Re: [RE-wrenches] Derik of Hi Power Hydro: Missing in Action?

[David Katz]

Wait a few day.  Asis.com, the local internet service is broken and has been 
for 4 days.
You can call Derik at 707-923-3507
David katz

-Original Message-
From: re-wrenches-boun...@lists.re-wrenches.org 
[mailto:re-wrenches-boun...@lists.re-wrenches.org] On Behalf Of Mark Dickson
Sent: Monday, August 09, 2010 10:33 AM
To: 'RE-wrenches'
Subject: [RE-wrenches] Derik of Hi Power Hydro: Missing in Action?

Try his other website: http://homehydro.com/ 
The last I spoke to him was a couple of months ago. . .

Best regards,
 
Mark Dickson,
NABCEP Certified Solar PV Installer T
Oasis Montana Inc.

-Original Message-
From: re-wrenches-boun...@lists.re-wrenches.org
[mailto:re-wrenches-boun...@lists.re-wrenches.org] On Behalf Of Mick Abraham
Sent: Monday, August 09, 2010 11:15 AM
To: RE-wrenches
Subject: [RE-wrenches] Derik of Hi Power Hydro: Missing in Action?

Hello, Wrench List members~

A recent thread on the Re-wrenches forum recommended Derik Veenhuis of
Hi Power Hydro.

www.hipowerhydro.com is non-operational and my email attempt to
de...@asis.com was "rejected by the recipient domain".

Can someone advise if I'm missing a character or two in the website
address or the email address? Does anyone know if Derik is OK/still
available for hydro project assistance?

List members can contact me off list if that seems more appropriate.

Jolliness,

Mick Abraham, Proprietor
www.abrahamsolar.com

Voice: 970-731-4675
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Re: [RE-wrenches] AC to AC syncrhonizer for hydro plant.

[David Katz]

 Jeremy,
You can use a PV Powered inverter if the Hydro is in range of the sizes 
they make.  You just need to rectifiy the AC output of the hydro. They 
are very tolerant of spikes and load changes in the house.  You will 
also need a device to prevent the voltage from exceeding the maximum 
input voltage of the inverter.  This is simpler and less expensive that 
trying to synchronize the turbine to the grid.
Call Derik Veenhuis at Hydroinduction Power - 707 925-3507. He has done 
this many times.

David

David Katz

Chief Technical Officer

AEE Solar

1155 Redway Drive

P.O. Box 339

Redway, CA  95560

Tel (707) 825-1200

Fax (707) 825-1202

dk...@aeesolar.com <mailto:da...@aeesolar.com>

www.aeesolar.com <http://www.aeesolar.com/>

DISCLAIMER:
This communication, along with any documents, files or attachments, is 
intended for the use of only the addressee and contains privileged and 
confidential information. If you are not the intended recipient, you are 
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any manner.



On 9/2/2010 3:55 PM, All Solar, Inc. Jeremy & Amy Rodriguez wrote:

Wrenches,
Got a phone call from a gentleman that is in need of a device that 
will take 240v 60hz and synch with the local utility.

I guess kind of like a grid tie inverter, but AC in not DC input.
Any ideas?
Jeremy
All Solar Inc.
CO, USA


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Re: [RE-wrenches] 120 volt grid tie inverter

[David Katz]

Has anyone tried string sizing 60 cell modules to an SMA 700.  It is not 
possible.


David Katz

Founder & CTO

AEE Solar

T(707) 825-1200

C(831) 325-9582

F(707) 825-1202

dk...@aeesolar.com <mailto:da...@aeesolar.com>

www.aeesolar.com <http://www.aeesolar.com/>


On 11/15/2010 5:29 PM, Glenn Burt wrote:

I think there is still an SMA 700W inverter available that uses 120VAC.
-Glenn

-Original Message-
From: re-wrenches-boun...@lists.re-wrenches.org
[mailto:re-wrenches-boun...@lists.re-wrenches.org] On Behalf Of Bob Ellison
Sent: Monday, November 15, 2010 11:14 AM
To: RE-wrenches
Subject: [RE-wrenches] 120 volt grid tie inverter

I have a customer who wants to grid tie a 120 volt dc system
Does anyone know of an inverter that can do this?

Thanks
Bob ellison


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Re: [RE-wrenches] Internet-based monitoring

[David Katz]

Joel,
Check out Solarlog.  it is a German company.  i have been testing one of 
their monitoring systems for about 6 months.  The cost is low and the 
features are great.  They have a web portal and you can look directly on 
your computer.  They also have a great free iPhone app.  Single inverter 
systems start at $495 retail, including the equipment and 5 years of 
monitoring

http://solarlog-web.net
David

David Katz

Founder & CTO

AEE Solar

T(707) 825-1200

C(831) 325-9582

F(707) 825-1202

dk...@aeesolar.com <mailto:da...@aeesolar.com>

www.aeesolar.com <http://www.aeesolar.com/>


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Re: [RE-wrenches] Internet-based monitoring

[David Katz]

Joel,
Check out Solarlog.  it is a German company.  i have been testing one of their 
monitoring systems for about 6 months.  The cost is low and the features are 
great.  They have a web portal and you can look directly on your computer.  
They also have a great free iPhone app.  Single inverter systems start at $495 
retail, including the equipment and 5 years of monitoring
http://solarlog-web.net
David
David Katz
Founder & CTO
AEE Solar
T(707) 825-1200
C(831) 325-9582
F(707) 825-1202
dk...@aeesolar.com<mailto:da...@aeesolar.com>
www.aeesolar.com<http://www.aeesolar.com/>


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Re: [RE-wrenches] Low temperature over-voltage bypass (not Apollo Solar)

[David Katz]

Title: David Katz


  
  
Lee,
We never had enough interest to warrant getting a UL listing on the
product. Is it for grid-tie or off-grid?
David


  
  
  
  
  
  
  
  
  
David Katz
Founder & CTO
AEE Solar
T(707) 825-1200
C(831) 325-9582
F(707) 825-1202
dk...@aeesolar.com
www.aeesolar.com
 
DISCLAIMER: 
This communication, along with any documents, files or
attachments, is intended
for the use of only the addressee and contains privileged
and confidential
information. If you are not the intended recipient, you are
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notified that any dissemination, distribution or copying of
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Try our new Online Store. Purchase
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On 1/10/2011 1:07 PM, Allan Sindelar wrote:

  
  Lee,
  I think Dave Katz at AEE had a solution, although I don't remember
  the details. You might contact him.
  
  








  Allan Sindelar
  Allan@positiveenergysolar.com
  NABCEP Certified Photovoltaic Installer
  EE98J Journeyman Electrician
  Positive Energy, Inc.
  3201 Calle Marie
  Santa Fe, New Mexico 87507
  505 424-1112
  www.positiveenergysolar.com

  
  
  On 1/10/2011 12:45 PM, Lee Bristol wrote:
  
Wrenches,

Does anyone know of a UL Listed low temperature, over-voltage bypass
device like the dis-continued Apollo Solar product?  I need to knock
out or bypass one module of a string when the temperature gets below 5
degrees F.  The Apollo product was appropriate but is no longer
available.

Thanks!

Lee


  
  

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Re: [RE-wrenches] Help me locate "Light It Technologies" aka "Montana Light" aka Don Smith

[David Katz]

Title: David Katz


  
  
Backwoods Solar still stocks Light-it products


  
  
  
  
  
  
  
  
  
David Katz
Founder & CTO
AEE Solar
T(707) 825-1200
C(831) 325-9582
F(707) 825-1202
dk...@aeesolar.com
www.aeesolar.com
 
DISCLAIMER: 
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Try our new Online Store. Purchase
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On 1/21/2011 8:08 AM, Mick Abraham wrote:
Hi, Mechanics~
  
  My contact information for "Montana Light" aka "Light It
  Technologies" has gone stale. The (406) 683-2697 phone number
  doesn't work, and moderate internet searches have also failed to
  turn up the connection. 
  
  I need some of those lighting adapters that screw into an Edison
  base lamp socket then allow an MR-16 projector style bulb to plug
  in. I think LIT is about the only place to get those so I would
  appreciate if someone could tell me how to find that company.
  
  Jolliness,
   
  Mick Abraham, Proprietor
  www.abrahamsolar.com
  
  Voice: 970-731-4675
  

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Re: [RE-wrenches] Photowatt warranty: who can I call?

[David Katz]

Title: David Katz


  
  
Mick,
Photowatt's operation in the US was owned by ATS.  They are now
producing modules in Ontario Canada.  
ATS Automation
   730 Fountain Street North
Building #2
Cambridge, ON
N3H 4R7 Canada
Tel: (519) 650-2332
Fax: (519) 650-6697
Email: i...@atsautomation.com
http://www.atsautomation.com/profile/worldwide/pro_apg_photowatt_headoffice.asp

Good luck.
  David



  
  
  
  
  
  
  
  
  
    David Katz
Founder & CTO
AEE Solar
T(707) 825-1200
C(831) 325-9582
F(707) 825-1202
dk...@aeesolar.com
www.aeesolar.com
 
DISCLAIMER: 
This communication, along with any documents, files or
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Try our new Online Store. Purchase
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easy!

  


  

  


On 1/22/2011 12:21 PM, Mick Abraham wrote:
Greetings, all~ A client has some Photowatt 72 cell
  modules--PW1000 is the model if I remember correctly. The client
  wants to have a warranty related chat with Photowatt, but they
  left the US market some time ago. 
  
  Can anyone supply proper contact information for the mother ship
  in France?
  
  Thanks,
  
  Mick Abraham, Proprietor
  www.abrahamsolar.com
  
  Voice: 970-731-4675
  

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Re: [RE-wrenches] Sunny boy 1800

[David Katz]

Jesse,
Here is one more thing to look at.  I have 3 SMA 1800 W inverters on my 
house and had a very similar problem when I installed them.  They are 
very sensitive to AC voltage.  Mine would turn off at 128 VAC.  My 
utility voltage is 125 per leg and because of voltage "drop" in a log 
run of wire, it would get over 128 when the inverters were putting out 
power. This made it go on and off every 5 minutes.  I changed the 
parameters through the Sunny WebBox and set the AC cut-off to 135 and 
the problem went away.

David

David Katz

Founder & CTO

AEE Solar

T(707) 825-1200

C(831) 325-9582

F(707) 825-1202

dk...@aeesolar.com <mailto:da...@aeesolar.com>

www.aeesolar.com <http://www.aeesolar.com/>



On 4/6/2011 4:41 PM, Jesse Dahl wrote:

Wrenches,

I've been working on a sunny boy 1800 with some problems. There is no manual 
and SMA website does not have it available.  I need to watch the lights on the 
inverter to find the problem, but I'm not there now and I can't get this off my 
mind, so I will ask the esteemed members of this list.

When it's cloudy, the inverter comes on and loads the array. I can watch the 
sunny keeper watts reading rise until it get around 1000w and full sun hits the 
array.  Once full sun hits the array, the inverter drops out.  It did it three 
times to me today, and the inverter will not come on during full sun. Grid 
volts and hz are okay durning this.

I know it's impossible to troubleshoot like this, but anyone deal with problems 
like this?


Thanks for the help!


Jesse Dahl

Sent from my iPad!!!
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Re: [RE-wrenches] Heavy Duty Modules?

[David Katz]

Doug
I know the frame on SolarWorld modules will not peel off.  I tried to 
remove the glass on one to use the frame for a display, and even after 
smashing the glass with a sledge hammers and jumping on the broken 
glass, I could not get the frame off.

Mitsibishi modules have a cross bar in the frame to add extra strength.
David Katz

David Katz

Founder & CTO

AEE Solar

T(707) 825-1200

C(831) 325-9582

F(707) 825-1202

dk...@aeesolar.com <mailto:da...@aeesolar.com>

www.aeesolar.com <http://www.aeesolar.com/>




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Re: [RE-wrenches] Trickle charge a generator cranking battery?

[David Katz]

I have been using a 10 watt module without a charge control to charge my 
generator cranking battery for more than 5 years and i have never had to 
add water.

David


David Katz

Founder & CTO

AEE Solar

T(707) 825-1200

C(831) 325-9582

F(707) 825-1202

dk...@aeesolar.com <mailto:da...@aeesolar.com>

www.aeesolar.com <http://www.aeesolar.com/>


On 4/15/2011 10:28 AM, William Miller wrote:

Friends:

Ii it possible, with the correct module, to trickle charge a generator 
cranking battery without the use of a charge controller?  What modules 
fit this criteria?


Thanks in advance.

William

William Miller
Miller Solar
Voice :805-438-5600
email: will...@millersolar.com
http://millersolar.com
<http://millersolar.com/>License No. C-10-773985


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Re: [RE-wrenches] balasted racks

[David Katz]

My favorite is AET.
David

David Katz

Founder & CTO

AEE Solar

T(707) 825-1200

C(831) 325-9582

F(707) 825-1202

dk...@aeesolar.com <mailto:da...@aeesolar.com>

www.aeesolar.com <http://www.aeesolar.com/>


On 4/16/2011 8:38 PM, Nick Vida wrote

hey wrenches.

i am looking at some ballasted racks. Any favorites or least 
favorites? trifling experiences?


i would appreciate hearing from you!

thanks,

nick vida


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Re: [RE-wrenches] Interfacing an Air 403 wind generator

[David Katz]

Peter,
I recently bought a 250 watt grid tie inverter from SWEA in Holland.  It 
is designed for connecting a 250 watt wind generator to the grid without 
batteries.  The kit came with a diversion control to prevent over 
voltage, and a grid-tie inverter that plugs directly into an ac outlet.  
This is legal, up to 600 watts in Holland.  I am planing to test it with 
an AirBreeze, but i have not had time to do it yet.  cost was around 
$300 and reviews i have read say they work.
I see on the web that they may be available from a company called 
Insight Wind and Solar. 
http://insightwas.com/catalog/swea-watt-grid-inverter-starter-wind-p-39.html

Let me know if you try it.
David


David Katz

Founder & CTO

AEE Solar

T(707) 825-1200

C(831) 325-9582

F(707) 825-1202

dk...@aeesolar.com <mailto:da...@aeesolar.com>

www.aeesolar.com <http://www.aeesolar.com/>


On 5/5/2011 10:26 AM, Peter Talmage wrote:
I have a client with an independent power system who is going utility 
interfaced. We are putting the 24 volt arrays on Ephase inverters. He 
wants the Air 403 to be interfaced as well. Has anyone done this and 
if so, how ?  Thanks


Peter Talmage, P.E.

Energy and Design


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Re: [RE-wrenches] Xantrex 3 XW system bypass

[David Katz]

Brian,
I have that setup in the old AEE trailer.  We used it for charging a 
plug in hybrid for a race.  When ever the car was not plugged in, power 
went backwards through the SW4024 and charged batteries.  The waveform 
worked fine with and SMA 1800, which has a 120 VAC output.

David

David Katz

Founder & CTO

AEE Solar

T(707) 825-1200

C(831) 325-9582

F(707) 825-1202

dk...@aeesolar.com <mailto:da...@aeesolar.com>

www.aeesolar.com <http://www.aeesolar.com/>


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Re: [RE-wrenches] Fwd: Car charging station without grid

[David Katz]

Gary,
I have a Nissan Leaf with a standard Level 2 charging port that accepts 
AC and I also have a Level 3 port that is directly connected to the 
battery.  At this point there are no chargers for this port, but they 
are coming, so technically it is easy to get to the DC side of the car.
Also, I made a standalone charging station for the UC Davis plug-in 
hybrid race team by using a Sunnyboy/SunnyIsland combination with 25 
kw-hours of battery.  When the car charger was plugged into the AC 
outlet it drew 3 kw.  2kw came from the array and one came from the 
battery through the SunnyIsland.  When the charger was unplugged, the 
array charged the batteries through the SunnyBoy and SunnyIsland.  This 
allowed the batteries to absorb the array output between charges.

David Katz



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Re: [RE-wrenches] history of grid-tie inverters

[David Katz]

Hi Jim,
Ascension Technology in MA sold AC modules in 1996 using ASE 300 watt modules 
with the Ascention Sunsine inverter mounted on the back.  There are 20 kw of 
them on the pentagon.
AEE sold AC modules using 100 watt Solec and Siemens modules with NKF 
micro-inverters in 1996.  I know Larry Schlussler from SunFrost is still 
operating 6 of them.  We also use Omnion grid tie inverters in the mid 90's.  A 
2500 watt inverter was almost as big as a refrigerator and nearly as heavy.  I 
just gave one away a few years ago.
John Berdner, who now works for SolarEdge brought SunnyBoy inverters to the US 
in 2000 because Xantrex did not pay him for so BOS equipment that APT was 
making for Xantrex.  At the same time he convinced UL that the Xantrex SW5548 
should not have UL listing and UL took away their listing.  Xantrex had 90% 
market share of grid tie inverters until that time, then they dropped to 0%.  
The SMA's were the first 600 volt inverters to be used in the US.  Before that, 
everything was 48 volt.
Regards,
David Katz
AEE Solar

From: re-wrenches-boun...@lists.re-wrenches.org 
[mailto:re-wrenches-boun...@lists.re-wrenches.org] On Behalf Of Jim MacDonald
Sent: Wednesday, September 14, 2011 10:38 AM
To: RE-wrenches
Subject: [RE-wrenches] history of grid-tie inverters

Hi wrenches
I am writing a paper for school which talks a bit about the first grid-tied PV 
systems [both authorized and unauthorized] in history.
I am scouring old copies of Home Power and reading about the guerrilla solar 
systems of the 90's.

Could anyone direct me to a website, article, or book that talks about the 
first grid-tied PV systems?  If it includes info about pioneer GT systems in 
Europe, Japan, and elsewhere as well, that'd be great.


thanks

Jim MacDonald
Solar Energy Systems, LLC
Brooklyn, NY 11222


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Re: [RE-wrenches] High Temp Batteries

[David Katz]

Chris,
One of our customers had this problem in outdoor lighting in Las Vegas. He 
switched to Lithium-Ion batteries from K2 in Henderson NV and says they have 
been working well for 3 years in desert heat.  They make small 12 volt packs 
with built-in charge control and discharge protection.  They may be a good 
choice if the system is under 100 amp hours.
David Katz
AEE Solar

From: re-wrenches-boun...@lists.re-wrenches.org 
[mailto:re-wrenches-boun...@lists.re-wrenches.org] On Behalf Of Chris Daum
Sent: Thursday, September 22, 2011 8:35 AM
To: 'RE-wrenches'
Subject: [RE-wrenches] High Temp Batteries

Dear Wrenches:

I have people trying to power medical equipment in an extremely hot 
environment--they need batteries that can withstand temps of 75 degrees Celcius.

The Yuasa batteries they've been using are only rated to 50C and don't last 
long (and thus, are cost-prohibitive to use and replace).

The MK AGMs are also only rated to 50C.  Any ideas or alternatives would be 
appreciated.

Chris Daum
Oasis Montana Inc.
406-777-4309
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Re: [RE-wrenches] What's the right action?

[David Katz]

Hi Allan
You could credit him the interest on the $600 he loaned you.
David

From: Allan Sindelar [mailto:al...@positiveenergysolar.com]
Sent: Thursday, October 06, 2011 03:32 AM
To: RE-wrenches 
Subject: [RE-wrenches] What's the right action?

OK, here's one way off the beaten path.

I live in an historic offgrid rural neighborhood of eccentrics. Makes for quite 
rewarding life and work. In 2003 a neighbor came to me for a system. His budget 
was $6K and needs were modest. He didn't want installation, would install it 
himself. We built a system on a plywood panel with DR2424 and XP250, DC175, 
SunSaver, Tri-Met, with all proper disconnects, prewired with connection points 
labeled. Array was two SX150s on a pole-top rack, and it used eight golf carts; 
a good budget system for that time. Phil Undercuffler (of Outback now) did the 
work well. The neighbor was pleased with the result and took the system home 
with him except for the batteries. Paid in full, check was good (as they 
virtually always are).

He never came back for the batteries. We saw each other periodically, and after 
once or twice I stopped asking about them, figured he had his reasons. Golf 
carts are the only batteries we routinely stock, and his were eventually 
rotated back into stock to keep it fresh, so no special-order loss there. Last 
week we passed on our "road" and he stopped me to ask for the dimensions for 
the battery box he was about to build, and said he'd be in touch to get the 
batteries.

In 2003 golf carts were $75 and cores kept the beer fund stocked in good 
weather. Today they're $150 exchange, with a $20 core value. So I'm posting to 
get preemptive guidance when he comes for his batteries.

It seems the most straightforward approach is to simply tell him the current 
cost of the batteries and offer to apply the $600 he paid in 2003 toward the 
current cost for eight without core exchange. He won't be expecting to fork out 
an extra $760. I'd like to keep him satisfied, and can see at least eight 
different ways to approach this, all justifiable and none ideal.

Has this ever happened to you? What would you do, that's fair, equitable, and 
is likely to keep a reasonable customer happy?

I'll post what eventually happens when it's done. Of course, that could be 
another eight years.

Thanks, Allan
--
Allan Sindelar
al...@positiveenergysolar.com
NABCEP Certified Photovoltaic Installer
NABCEP Certified Technical Sales Professional
New Mexico EE98J Journeyman Electrician
Positive Energy, Inc.
3201 Calle Marie
Santa Fe, New Mexico 87507
505 424-1112
www.positiveenergysolar.com


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Re: [RE-wrenches] intermittent battery problem

[David Katz]

How old are the batteries? Did you do the hydrometer reading, or are you 
relying on info from the customer. It is easy toi misread a hydrometer. When 
was the last time the batteries were at 30+ volts?
David Katz

From: Ron Young [mailto:solarea...@solareagle.com]
Sent: Saturday, October 08, 2011 11:01 AM
To: RE-wrenches 
Subject: [RE-wrenches] intermittent battery problem

Howdy Wrenches,

One of my customers that lives 3 hours out in the back country is having an 
intermittent problem that I haven't encountered before. The batteries drop 
rapidly in voltage but hydrometer readings are in the green. Turning off the 
inverter and just using DC doesn't change anything. Meters on the Mate, Outback 
MX and Whisper controller are all the same so it's not a metering problem. On 
the way to bed the batteries were at 25.4, overnight with no loads they dropped 
to 22.9 then a short 15 min. charge with a generator brings the batteries back 
up and two hours later they are at 25.8. This scenario has occurred several 
times and then doesn't appear for a day or two.

It doesn't seem to be sulfation as the batteries are reading good on the 
hydrometer every time. All cells check out. The inverter doesn't seem to be the 
problem. They have a Sunfrost on a separate DC circuit. It sounds like an 
intermittent circuit problem or electronics issue. Customer has checked and 
tightened all the connections he can get at but hasn't been inside the 
components. Would appreciate any suggestions or clues before I make the trip.

Ron Young

earthRight Products - Solareagle.com<http://Solareagle.com>
Alternative Energy Solutions ~ Renewable Energy Products


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Re: [RE-wrenches] intermittent battery problem

[David Katz]

If it takes 2 hours of charging to get to 25.8, the batteries are very 
discharged. It should be that high as soon as you start charging with a decent 
charger.
David Katz

From: Ron Young [mailto:solarea...@solareagle.com]
Sent: Saturday, October 08, 2011 11:01 AM
To: RE-wrenches 
Subject: [RE-wrenches] intermittent battery problem

Howdy Wrenches,

One of my customers that lives 3 hours out in the back country is having an 
intermittent problem that I haven't encountered before. The batteries drop 
rapidly in voltage but hydrometer readings are in the green. Turning off the 
inverter and just using DC doesn't change anything. Meters on the Mate, Outback 
MX and Whisper controller are all the same so it's not a metering problem. On 
the way to bed the batteries were at 25.4, overnight with no loads they dropped 
to 22.9 then a short 15 min. charge with a generator brings the batteries back 
up and two hours later they are at 25.8. This scenario has occurred several 
times and then doesn't appear for a day or two.

It doesn't seem to be sulfation as the batteries are reading good on the 
hydrometer every time. All cells check out. The inverter doesn't seem to be the 
problem. They have a Sunfrost on a separate DC circuit. It sounds like an 
intermittent circuit problem or electronics issue. Customer has checked and 
tightened all the connections he can get at but hasn't been inside the 
components. Would appreciate any suggestions or clues before I make the trip.

Ron Young

earthRight Products - Solareagle.com<http://Solareagle.com>
Alternative Energy Solutions ~ Renewable Energy Products


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Re: [RE-wrenches] intermittent battery problem

[David Katz]

Ron
If the customer does not get enough elecrolyte into the hydrometer to lift the 
float, the level could be in the green on a dead battery. If they don't have a 
dead cell they must have a fully discharged battery. An 1100 ah battery seeing 
a 100 amp charge would be closer to 30 volts after 2 hours of charging if it 
had even a 50% charge.
David Katz

From: Ron Young [mailto:solarea...@solareagle.com]
Sent: Saturday, October 08, 2011 11:31 AM
To: RE-wrenches 
Subject: Re: [RE-wrenches] intermittent battery problem

There is no amp hour meter in the system. The dump load on the Whisper sounds 
like a possibility... Batteries are 4ks21 Surrettes with an 1100 a/h rating 
@20hr rate and should have plenty of life left in them. They have been eq'd on 
a regular basis and maintenance has been good. Alas the customer doesn't own a 
multimeter so can't check the individual battery voltages but has checked each 
cell with tubular hydrometer and tell me that all cells are in the green. They 
may misread a hydrometer but the colour is easy to see so I'm pretty sure they 
don't have a bad cell.

Ron

earthRight Products - Solareagle.com<http://Solareagle.com>
Alternative Energy Solutions ~ Renewable Energy Products

On 2011-10-08, at 11:20 AM, jay peltz wrote:

HI Ron,

Do you have an amp hr meter in the system?

When you say 15 min of genny brings the batteries back up, back up to what as 
you also say, 2 hrs later they are at 25.8v?

I would guess the problem is the dump load controller on the Whisper, its 
turing on for some reason, draining the batteries.

But for me without an amp hr meter, hard to really know what is happening 
overnight ie was there really a drain on the system?

jay

peltz power

On Oct 8, 2011, at 11:01 AM, Ron Young wrote:

Howdy Wrenches,

One of my customers that lives 3 hours out in the back country is having an 
intermittent problem that I haven't encountered before. The batteries drop 
rapidly in voltage but hydrometer readings are in the green. Turning off the 
inverter and just using DC doesn't change anything. Meters on the Mate, Outback 
MX and Whisper controller are all the same so it's not a metering problem. On 
the way to bed the batteries were at 25.4, overnight with no loads they dropped 
to 22.9 then a short 15 min. charge with a generator brings the batteries back 
up and two hours later they are at 25.8. This scenario has occurred several 
times and then doesn't appear for a day or two.

It doesn't seem to be sulfation as the batteries are reading good on the 
hydrometer every time. All cells check out. The inverter doesn't seem to be the 
problem. They have a Sunfrost on a separate DC circuit. It sounds like an 
intermittent circuit problem or electronics issue. Customer has checked and 
tightened all the connections he can get at but hasn't been inside the 
components. Would appreciate any suggestions or clues before I make the trip.

Ron Young

earthRight Products - Solareagle.com<http://Solareagle.com/>
Alternative Energy Solutions ~ Renewable Energy Products


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Re: [RE-wrenches] intermittent battery problem

[David Katz]

How many years have they been off grid. It is pretty common for people to have 
problems when the days get shorter and the nights get longer in the fall. My 
guess is he gets about 30 amps of charge using a 2500 watt generator and 
probably less if loads are on when they charge. You should tell them they need 
to run the generator for 40 hours to catch up. Customers never like to hear 
that. A trimetric will help them keep up.
David Katz

From: Ron Young [mailto:solarea...@solareagle.com]
Sent: Saturday, October 08, 2011 06:42 PM
To: RE-wrenches 
Subject: Re: [RE-wrenches] intermittent battery problem

Thanks Bob but he has a tubular type hydrometer, not the pointer type. They're 
usually ok but I'll check it against mine when I go there which looks like a 
certainty.

They EQ the batteries on a regular basis as per my instructions (they say) but 
will have to nail them down on that. The small 2500w generator worries me but 
they have 800w solar and a Whisper 100. The wind blows a lot. Inverter is a 
3524 Outback.

Ron

On 2011-10-08, at 5:07 PM, bob ellison wrote:

I bet he has a cheap pointer type hydrometer, I have seen them be way off from 
reality.
My guess is that the gravity is low the voltage changes quickly, specific 
gravity changes slowly in a battery bank.
To fully charge a 24 volt bank you need to get it to 29 + volts and keep it 
there for several hours, depending on the battery bank size.
Charging it to 25.4 is nothing in the long run.
Give them a LONG full charge, what are the inverters? Does it ever get an EQ 
charge?

Bob Ellison

From: 
re-wrenches-boun...@lists.re-wrenches.org<mailto:re-wrenches-boun...@lists.re-wrenches.org>
 [mailto:re-wrenches-boun...@lists.re-wrenches.org] On Behalf Of Ron Young
Sent: Saturday, October 08, 2011 2:02 PM
To: RE-wrenches
Subject: [RE-wrenches] intermittent battery problem

Howdy Wrenches,

One of my customers that lives 3 hours out in the back country is having an 
intermittent problem that I haven't encountered before. The batteries drop 
rapidly in voltage but hydrometer readings are in the green. Turning off the 
inverter and just using DC doesn't change anything. Meters on the Mate, Outback 
MX and Whisper controller are all the same so it's not a metering problem. On 
the way to bed the batteries were at 25.4, overnight with no loads they dropped 
to 22.9 then a short 15 min. charge with a generator brings the batteries back 
up and two hours later they are at 25.8. This scenario has occurred several 
times and then doesn't appear for a day or two.

It doesn't seem to be sulfation as the batteries are reading good on the 
hydrometer every time. All cells check out. The inverter doesn't seem to be the 
problem. They have a Sunfrost on a separate DC circuit. It sounds like an 
intermittent circuit problem or electronics issue. Customer has checked and 
tightened all the connections he can get at but hasn't been inside the 
components. Would appreciate any suggestions or clues before I make the trip.

Ron Young

earthRight Products - Solareagle.com<http://Solareagle.com>
Alternative Energy Solutions ~ Renewable Energy Products


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Re: [RE-wrenches] Solar gathering?

[David Katz]

Next year it will be in Orlando.
David Katz

- Original Message -
From: Jesse Dahl [mailto:dahlso...@gmail.com]
Sent: Monday, October 10, 2011 07:06 AM
To: RE-wrenches 
Subject: Re: [RE-wrenches] Solar gathering?

Thanks for the advice!  Dallas here I come...next year!

Jesse

Sent from my iPad!!!

On Oct 8, 2011, at 10:37 AM, "Joel  Davidson"  
wrote:

> Dear Jesse,
> 
> 1. Go to the Dallas solar exhibition and spend a lot of time on the floor 
> talking to real engineers with field experience (not salespeople). First 
> question to ask is "How many PV systems have you installed?" Anyone with less 
> than 50 systems under their belt is either reading from the book or still in 
> training.
> 
> 2. Attend a Bill Brooks training session. Bill has strong opinions that some 
> wrenches disagree with but has seen more PV installations than over 99% of 
> the people on Earth and has spend decades thinking about what is good and bad 
> PV.
> 
> 3. Meet with and walk the exhibit floor with and talk shop day and night with 
> as many wrenches as you can (at least 3 a day).
> 
> 4. Go to the exhibits all the time they are open and keep your ears open. 
> Wrenching is parts and the people who put parts together. Only go to sessions 
> and workshops when the exhibits are closed.
> 
> 5. Don't become a true believer in any one part or one way to put parts 
> together. There are many good and bad parts and techniques. The quest is 
> finding something better.
> 
> Have fun.
> Joel Davidson
> "Not all change is for the better, but nothing gets better without change."
> 
> - Original Message - From: "Jesse Dahl" 
> To: "RE-wrenches" 
> Sent: Saturday, October 08, 2011 7:56 AM
> Subject: [RE-wrenches] Solar gathering?
> 
> 
>> All,
>> 
>> I am looking for advice on a trade show or continuing Ed classes to attend 
>> in the future.  I have around $1800 to spend on this endeavor.
>> 
>> Any suggestions?
>> 
>> Thanks as always,
>> 
>> Jesse
>> 
>> Sent from my iPhone
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Re: [RE-wrenches] intermittent battery problem

[David Katz]

Ron,
I don't think it was the water.  It was probably the 10 hours they ran the 
generator that brought them up a bit.  If the water is low, the electrolyte is 
more concentrated and will make the s.g seem higher.  Adding water to the 
proper level will make the reading more accurate.
I still think they are pretty sulfated.  When they said they reached 29 volts 
in 5 minutes every morning with a charge of less than 30 amps (an assumption, 
since they are running a 2500 watt generator), that sounds like a battery with 
very little capacity.  The fact that they stayed at 25.7 all day was probably 
because of the 800 watt PV array and light loads.  It would be interesting to 
do a real equalization and a capacity test to see what is left of the batteries.
David

David Katz
CTO & Founder
AEE Solar Inc
P: 707 825-1200
F: 707 825-1202
dk...@aeesolar.com
www.aeesolar.com


From: re-wrenches-boun...@lists.re-wrenches.org 
[mailto:re-wrenches-boun...@lists.re-wrenches.org] On Behalf Of Ron Young
Sent: Friday, October 21, 2011 11:39 AM
To: RE-wrenches
Subject: Re: [RE-wrenches] intermittent battery problem

Hi Maverick & everyone,

I visited the site a couple of days ago and load tested the batteries, checked 
individual voltages in the string of six Surrette 4KS25's (4.3v each), checked 
all connections etc. The client told me that when they would go to bed battery 
volts read 25.7. Through the night this would seem to stay steady. About 4 a.m. 
as far as they could tell the voltage would drop to about 24.5. This happened 
without a load present and with no charging present (calm, no wind, no sun). 
They would start up the generator for five minutes in the morning and see the 
voltage come up to just above 29v then turn off the generator (a small Honda 
2500) and the voltage would settly at 25.7 and remain there most of the day 
even when using their light loads, some lights, phone system, laptop and the 
Sunfrost.

When checking the batteries I noticed they needed watering and mentioned this 
to the customer. The electrolyte was just over the plastic screen above the 
plates by about 1/4 inch. He said he had just watered them and always kept them 
filled. I replied that they were low and when he looked he said no, that's 
where I keep them! When I checked the specific gravity reading it was very rich 
reading around 1.275 - 1.280. I topped them up properly to about 1/4 inch below 
the bottom of the cell channel which took about 5 cups per each battery. Of 
course as soon as I topped them up the s.g. dropped to around 1.175. I told him 
to put the generator on for about ten hours and call me in the morning.

I heard from the client today and in the last two days the voltage has only 
dropped from 25.6 to 25.4 overnight and s.g. reading is at 1.260 or better so 
problem seems to be solved.

So it appears the battery was under watered for several years. I'm still not 
sure why this would result in a sudden voltage drop, especially in the middle 
of the night with no loads present and no charging. Any additional thoughts 
appreciated.

Best Regards,
Ron Young
earthRight Products - Solareagle.com<http://Solareagle.com>


On 2011-10-21, at 5:18 AM, 
maver...@mavericksolar.com<mailto:maver...@mavericksolar.com> wrote:


Ron,

Just curious what the outcome was?

Thank you,

Maverick


Maverick Brown
BSEET, NABCEP Certified Solar PV Installer (r)
President & CEO
Maverick Solar Enterprises, Inc.
Office: 512-919-4493
Cell:512-460-9825

Sent from my HondaJet!


On 2011-10-11, at 12:11 PM, Maverick Brown [Maverick Solar] wrote:


Ron,

Sounds like you might have a voltage drop in the system at point of measurement.

A large voltage drop can happen for a few valid reasons.
1. High current demand. > Trimetric or better yet PentaMetric can show this 
demand.
2. Poor Cable connection. Visual / Thermal inspection or local Vdc measurement 
along the cable chain.
3. Low to moderate current demand with low SOC. Check the MX60 Logging function 
to see when the last day "Float" happened, i.e. how many minutes of Float in 
the last 60 days, etc. If there are none or few, then you still might be at a 
low SOC. (Trimetric or better yet PentaMetric can show the SOC as well).

Of course, not sure what happened to the Sunfrost, but a DC Clamp meter, might 
determine if it is normal now.

good luck,

Maverick



From: 
re-wrenches-boun...@lists.re-wrenches.org<mailto:re-wrenches-boun...@lists.re-wrenches.org>
 [mailto:re-wrenches-boun...@lists.re-wrenches.org] On Behalf Of Ron Young
Sent: Tuesday, October 11, 2011 2:00 PM
To: RE-wrenches
Subject: Re: [RE-wrenches] intermittent battery problem
Wrenches,
I received some additional info from the customer this morning. They have asked 
me to hold off my visit until they get a few more clues but some of what they 
are telling me doesn't necessarily jive with a sulphated battery. Would 

[RE-wrenches] Shell solar module question

[David Katz]

Wrenches,
I received the letter below from Photon magazine. I am posting it hear because 
it seems like a great way to get an answer:


Hi David,



Over the past year, Photon magazine's German publication has been reporting on 
significant delamination/hotspot problems reported with Shell Solar modules 
(RSM and S series) in Germany, and the customer-unfriendly response of 
Solarworld (which inherited the warranties when it acquired Shell Solar in 
2006).



Now, I am trying to figure out if similar problems are happening in North 
America -- e.g., how many of these defective modules were sold in North America 
and who are some of the main installers and system owners that are potentially 
affected. Can you recommend any sources that can help answer some of these 
questions? These panels were probably sold sometime between 2000 and 2006.



Thank you for your assistance,

Mike



Michael D. Matz





PHOTON USA Corp.

514 Bryant Street

San Francisco, California 94107, USA


David Katz
CTO & Founder
AEE Solar Inc
P: 707 825-1200
F: 707 825-1202
dk...@aeesolar.com
www.aeesolar.com
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[RE-wrenches] Sharp 62 Watt Shingle Installation Info needed

[David Katz]

Wrenches,
I just picked up 32 Sharp 62 watt roofing shingles that I want to install on my 
barn since it is time for a new roof.  Has anyone had any experience putting 
these modules on a roof in conjunction with cement tiles, which sharp's data 
sheet says they integrate with.
David Katz

David Katz
CTO & Founder
AEE Solar Inc
P: 707 825-1200
F: 707 825-1202
dk...@aeesolar.com
www.aeesolar.com
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Re: [RE-wrenches] Battery / no-battery

[David Katz]

The Heart Transverter can be grid-tied with or without a battery, but it is not 
through UL yet.
David Katz

- Original Message -
From: b...@midnitesolar.com [mailto:b...@midnitesolar.com]
Sent: Thursday, October 27, 2011 12:27 PM
To: RE-wrenches 
Subject: Re: [RE-wrenches] Battery / no-battery

On 10/27/2011 12:14 PM, Nathan Jones wrote:
> Gary,
> Sorry to interject on top of your previous reference to AC coupling. I had 
> not read your post before replying. I am not aware of any way to use a single 
> inverter for battery and non battery DC input. My thoughts with Williams 
> first post was an AC coupled arrangement of some sort. I would think that if 
> something like this was in development someone on the list would be aware of 
> it. But then again,maybe they aren't talking.
> Nathan Jones
> Power Source Solar


I may have dreamed this, but I thought for sure that I saw a solar 
grid-tie inverter at SPI either one or two years ago that
had a 48V tap that could be hooked up to a battery.  This was not one of 
the main inverter companies
we use but some Asian company I remember   Vaguely...   I remember 
that it was kind of odd but
not a real bad idea.  Most inverters do have an internal DC bus so this 
isn't totally out of the question.

If I could see a list of exhibitors from past SPI's, I might be able to 
remember.

boB





> On Thu Oct 27th, 2011 11:35 AM CDT Gary Willett wrote:
>
>> William:
>>
>> Like you, I'm unaware of an inverter that functions as grid 
>> tied/interactive, to which a battery bank can be added later to the same 
>> product.
>>
>> My guess is that Sunny Boy(s) would be installed first, followed by Sunny 
>> Island(s) if battery backup is wanted later.
>>
>> Same thing could be done with Schneider/Xantrex GT grid tied, followed later 
>> with an XW inverter/charger.
>>
>> Regards,
>>
>>
>> Gary Willett, PE
>> Icarus-Engineering LLC
>>
>> Icarus Solar Services LLC
>>
>>
>> On 10/27/2011 00:20, William Miller wrote:
>>> Friends:
>>>
>>> Is there such a thing as an inverter that does not need batteries today, 
>>> but next week you can add batteries?  A potential client tell me a 
>>> competitor is offering such an inverter.  I have a narrow field of 
>>> experience with battery inverters:  Trace, Xantrex and Outback, so I might 
>>> be unaware of a product.
>>>
>>> Thanks in advance,
>>>
>>> William
>>>
>>>
>>> Miller Solar
>>> Voice :805-438-5600
>>> email: will...@millersolar.com
>>> http://millersolar.com
>>> License No. C-10-773985
>>>
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Re: [RE-wrenches] mc4 inline fuses

[David Katz]

Conrad,
The inline fuse for PV cables is made by Shoals Technologies.  
http://shoals.com/?page_id=100026

David Katz
CTO & Founder
AEE Solar Inc
P: 707 825-1200
F: 707 825-1202
dk...@aeesolar.com
www.aeesolar.com

From: re-wrenches-boun...@lists.re-wrenches.org 
[mailto:re-wrenches-boun...@lists.re-wrenches.org] On Behalf Of conrad geyser
Sent: Thursday, November 10, 2011 6:21 PM
To: 'RE-wrenches'; 'boB Gudgel'
Subject: [RE-wrenches] mc4 inline fuses

Hi all,

Does anybody have any experience with / have a source for MC 4 inline fuses?  
http://www.win-solarllc.com/index.php?page=shop.product_details&flypage=flypage-ask.tpl&category_id=5&product_id=122&vmcchk=1&option=com_virtuemart&Itemid=113

thanks,

Conrad
Cotuit Solar

From: re-wrenches-boun...@lists.re-wrenches.org 
[mailto:re-wrenches-boun...@lists.re-wrenches.org] On Behalf Of Ron Young
Sent: Thursday, November 10, 2011 6:33 PM
To: boB Gudgel; RE-wrenches
Subject: Re: [RE-wrenches] Xantrex Vesta Online units

So would these be suitable for an off-grid application Bob? Any comments on the 
reliability? The proposed set is in individual residences on a First Nations 
reserve and the recipients will have zero technical knowledge for operation of 
them.

Ron Young

On 2011-11-10, at 2:41 PM, b...@midnitesolar.com<mailto:b...@midnitesolar.com> 
wrote:

On 11/10/2011 1:41 PM, Ron Young wrote:
Hi all, does anyone have any experience with the Xantrex Vesta Online units? I 
have just been contacted by a client who has several of these in storage and he 
wants to put them into use as off-grid inverter systems. The only thing I've 
been able to find out about them is that they seem to be UPS units. Client has 
no further info or manuals. I have a pic if anyone needs a look.

Best Regards,
Ron Young


The Vesta that I remember was a very early Xantrex,  late Trace battery box 
like thing with an inverter
in it.  The inverter would normally have been either a Statpower Prosine  or a 
Trace PS2512 or
some other voltage.   We called it the Pentasine cuz it had 5 transformers.

I wasn't sure if the Vesta was a shipping product but I guess they/we did ship 
some.

I have a couple of those that I use for shelves in the basement.  They had 
doors.

boB








earthRight Products - Solareagle.com<http://Solareagle.com/>
Alternative Energy Solutions ~ Renewable Energy Products
1-877-925-2929
blog: 
http://www.earthrightsolar.tumblr.com<http://www.earthrightsolar.tumblr.com/>
website: http://www.solareagle.com<http://www.solareagle.com/>
email: sa...@solareagle.com<mailto:sa...@solareagle.com>
79F North Third Ave
Williams Lake, BC
V2G 2A3




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Re: [RE-wrenches] Convert Grid Tie SW4048 to Backup System; Add New Inverter, AC Coupled

[David Katz]

Nathan,
I use an SW for backup in AC coupling. I use one of the auxiliary 1 amp relays 
to activate a larger relay on the AC output of the grid tie inverter to break 
the Ac connection when the batteries reach full charge voltage.  This is I 
simple but crude pwm charge control merthod.  When the AC breaks, the grid tie 
inverter goes off for 5 minutes.  The loads operate on the Sw, pulling the 
battery down, which closes the relay and the cycle repeats.
David Katz

- Original Message -
From: Nathan Jones [mailto:solardud...@yahoo.com]
Sent: Tuesday, November 22, 2011 07:10 AM
To: re-wrenches@lists.re-wrenches.org 
Subject: Re: [RE-wrenches] Convert Grid Tie SW4048 to Backup System;Add New 
Inverter, AC Coupled

Bill,
I believe Allans post indirectly answered my question.  While he did not 
specifically state the SW could be used in an AC coupled arrangement, I believe 
it was implied. Since the listing issue, as I understand it, was due to failure 
to drop out of sell mode in a certain set of circumstances and never had 
anything to do with the behavior of the inverter in any of its "incoming AC 
only" settings as far as disconnecting there should not be any question as to 
its suitability for AC coupling there. The only question would be how they 
would react and manage backfed AC from a GTI in event of a grid failure. That 
question is unknown to me and has not been specifically answered yet. Any one 
have an answer to that?
Nathan Jones
Power Source Solar
Springfield, Mo
R
417-827-0738
On Tue, Nov 22, 2011 6:08 AM CST Bill Loesch wrote:

>
>Fellow Wrenches,
>
>Didn't Jim Duncan provide the impetus for the delisting and hasn't he
>provided a comprehensive discussion here (or some other linked location)
>before?
>Does anyone have an answer to Nathan's question of 20 November 11?
>
>Bill Loesch
>
>- Original Message - 
>From: "William Miller" 
>To: "RE-wrenches" 
>Sent: Sunday, November 20, 2011 1:12 PM
>Subject: Re: [RE-wrenches] Convert Grid Tie SW4048 to Backup System; Add New
>Inverter, AC Coupled
>
>
>> Joel:
>>
>> I don't belive it was an NEC thing, it was a UL/ETL consideration.  This
>> relates to the NEC only in that it is required to use listed equipment.
>>
>> William Miller
>>
>>
>> At 09:21 AM 11/20/2011, you wrote:
>> >Where in the NEC is the requirement for the GTI interface?
>>
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Re: [RE-wrenches] Diversion load for AC coupled system

[David Katz]

Larry,
If you need a bigger diversion than a Tristar can handle, you can use a relay 
controlled by the auxiliary output of a charge control or inverter and have the 
relay close when the voltage is 0.2 volts higher than the diversion voltage.  
You can switch on a load that is 50 to 75 % of the diversion load and let the 
diversion controller do the fine tuning.  Let me know if that does not make 
sense. 
David Katz

- Original Message -
From: Larry Crutcher,   Starlight Solar Power Systems 
[mailto:la...@starlightsolar.com]
Sent: Tuesday, November 29, 2011 05:35 PM
To: RE-wrenches 
Subject: [RE-wrenches] Diversion load for AC coupled system

Hello Wrenches,

I would like some advice on diversion load control of 3800 watts of PV solar. 
The battery bank is 48 volts and the battery inverter is the MS4448PAE. This 
will AC couple with a grid tied inverter during an outage. Magnum Energy 
recommends the addition of a dump load for safe battery voltage control.  The 
customer may leave the home unattended for weeks so I am looking for 
reliability here. Quality, as well. 

A pair of Tristar 60's should be suitable for the 3.8kW output but I haven't 
been able to find a load that is sized for this job. I welcome any advice on 
this subject.  Thanks in advance.

Larry Crutcher
Starlight Solar Power Systems
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Re: [RE-wrenches] Diversion load for AC coupled system

[David Katz]

Larry,
I think you want the PWM controller to start first so the turn on will be 
smooth.  If the current capacity of the diversion controller is exceeded then 
you want the relay to switch in the big load.  At that point the diversion 
controller will back off and pickup the difference.  That is why I suggested 
the the relay controlled load be 50 to 75% of the pwm diversion load, so that 
whenever it turns on the pwm controller will be working, too.
David

David Katz
CTO & Founder
AEE Solar Inc
P: 707 825-1200
F: 707 825-1202
dk...@aeesolar.com
www.aeesolar.com
From: re-wrenches-boun...@lists.re-wrenches.org 
[mailto:re-wrenches-boun...@lists.re-wrenches.org] On Behalf Of Larry Crutcher, 
Starlight Solar Power Systems
Sent: Wednesday, November 30, 2011 8:49 AM
To: RE-wrenches
Subject: Re: [RE-wrenches] Diversion load for AC coupled system

David,
Ah..I think I see what you are saying. But, don't you mean .2 volts lower than 
the diversion load? That way there will only be limited current left for the 
diversion controller to handle. If it is the other way, what stops full current 
from flowing through the diversion controller if the .2 volts is not reached? 
Or is .2 volts two close to worry about that?

Larry Crutcher
Starlight Solar Power Systems



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Re: [RE-wrenches] rail less standing seam attachments

[David Katz]

Jay,
Try Rooftech. There are no rails and you don’t need to find the rafters.
They are great for do it yourselfers
David

On Fri, Mar 30, 2018 at 4:26 PM jay  wrote:

> HI All,
>
> I’ve got a client who is set on wanting to do rail less racking.   I’m
> just working with him on overall design, hes doing the work.
>
> Its not a large system.  16 modules on two roof orientations, ( 4 on one,
> 12 on the other)  with offset modules.  Standing metal seam roof that is
> being installed with solar in mind,  lots of fasteners.
>
> Hes very competent and pays attention to details.
>
> Any positive/negative recommendations.
>
> thanks in advance,
>
> jay
>
> peltz power
>
>
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Re: [RE-wrenches] generator search

[David Katz]

Check to see if it has a 120 vac requirement to float the battery. The 20
kw one I have has a big electrical drain
David

On Mon, Apr 9, 2018 at 11:50 AM jay  wrote:

> HI All,
>
> I’ve got a new project wanting a 22-25kw single phase 120/240vac water
> cooled propane sound attenuated generator for an off grid situation.  I’m
> not going to be
> With AGS activation.
>
> I”ve been looking at the Kohler 24 RCL ( meets all the above criteria) but
> I’m checking to see if I can get it to work with 2 wire AGS.
>
> Onan also has one as well.
>
> Are there any other make/models that people would recommend or would
> caution me against?
>
> Thanks
>
> jay
>
> peltz power
>
>
>
>
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Re: [RE-wrenches] Mounting on rock

[David Katz]

Aaron,
I have seen large pole mounts in Portugal in an above ground ring of
concrete 3 feet high and 6 feet in diameter. I would get an engineers
opinion on the size but that would be easier than digging a hole in rock.
David Katz

On Thu, Apr 12, 2018 at 6:27 AM Aaron Mandelkorn  wrote:

> Hi all,
>
> I have a customer that requires a mounting option I have yet to
> encounter.  His site sits on top of of a massive hill of granite.  It is
> relatively flat.  Are there any mounting options that could work here?  We
> are only talking about (12) to (16) modules for an off grid array.  Is
> there anything that can bolt to rock?  I typically use dpw or Mt solar pole
> mounts but can't imagine how these options could work.  Any thoughts?
>
> Aaron Mandelkorn
> President / Founder
> Renewable Energy Outfitters
> www.reosolar.com
> Off Grid Depot
> www.offgridnow.com
> 970-596-3744
>
>
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Re: [RE-wrenches] Non breakable RV modules

[David Katz]

Jay. Check out Gigasolarpv.com
They make a composite material with crystaline cells.  They get 156 watt
from a 36 cell module.

On Mon, Aug 20, 2018 at 6:07 PM Jay  wrote:

> Hi All
>
> What are good options for a portable module for RV use.
> One that you can move around, (it’s going to fall over)and connect with a
> cable to an camper.
>
> The old unisolar ones were perfect.
>
> Any recommendations are appreciated
> Size?  50-100 watts, 12v nominal.
>
> Thx
> Jay.
>
>
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Re: [RE-wrenches] Low Voc for effective string?

[David Katz]

Bill,
What is the full charge voltage of your L-ion pack. The one I am using need
56 VDC. Next look at the module data sheet and see % or actual drop in peak
power voltage per degree C. The modules will be about 60 degrees C which is
40 degrees higher that where they are rated.
My guess is that if you need 56 volts from two 60 cell modules it will be a
much lower current than peak current. The modules will be running closer to
open circuit voltage.
If you battery reaches full charge at 48 volts, it should charge fine, but
you will have other bigger problems.
David Katz


On Tue, Sep 11, 2018 at 3:04 PM Bill Battagin  wrote:

> I've been on hold with OB for about 40 minutes now and I need to know if 2
> SW PVs with a Voc of 39.9 and a Vmpp of 31.3 will do an effective job of
> charging a 48 volt LA battery especially with temps of 95 degrees.  Anybody
> have experience with this or similar,  Appreciate the feedback.  It just
> seems I'm a little low in Vmpp if I want to equalize when its hot.  Will it
> be even more questionable in 10 years as PVs age?
>
> OB did just pickup only to tell me I need Java for the string sizing tool
> and he can't help me with this configuration.
>
> Bill
>
> On 9/11/2018 1:28 PM, Sindelar Solar wrote:
>
> If it's a 48V system, you might also look at Blue Ion LiFePo batteries and
> eliminate the lead for good. I just installed my first set and consider it
> a game changer.
>
> Allan
> On 9/11/2018 1:44 PM, Steve Romo wrote:
>
> Good afternoon everyone,
>
> What has been your experience with the Outback OPzV battery? I have a
> client who destroyed a set of Solar One HUP batteries (2490 A/HR) by
> forgetting to water them for a year. We are looking to take watering out of
> the equation.
> He does need this much storage (maybe more) My next thought was 3 strings
> of GS SLR 1000  batteries (cycle life is a lot better but at twice the
> cost)
> I appreciate any and all input.
> --
> Steve Romo
> Mountain Power Solutions LLC
> NABCEP certified PV Installer #110112-124
> Kohler Certified Generator Technician
> Generac Certified Generator Technician
>
> 970-433-6316
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> al...@sindelarsolar.com
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> New Mexico EE98J Journeyman Electrician
> Founder (Retired), Positive Energy, Inc.
> *505 780-2738 cell*
>
>
>
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Re: [RE-wrenches] Reliable 48 to 24 V DC to DC reducer

[David Katz]

I have had great luck using cheap LED drivers.  They say 110-240 vac input
but they rectify the input to DC.  I have used them to run 12 and 24 volt
stuff off of 48 vdc and even 400 vdc. They operate down to about 35 volts
dc. They are available in a variety of output voltage and current. And they
are isolated.   And they only cost a few dollars.
https://rover.ebay.com/rover/0/0/0?mpre=https%3A%2F%2Fwww.ebay.com%2Fulk%2Fitm%2F152134115704
David Katz

On Sat, Sep 15, 2018 at 7:58 AM Drake 
wrote:

> Since Solar Converters seems to have evaporated, I'm not sure where to
> look for a 48 to 24 V DC to DC converter. Samplex has 24 to 12. It seems
> like someone mentioned a Canadian company that makes these.
>
> I need to step down power from a 48 V battery bank to power El Sid pumps
> for an offgrid hydronic  heating system.
>
> Thanks,
>
> Drake
>
> Drake Chamberlin
>
>
>
>
>
> *Athens Electric LLC OH License 44810 CO License 3773 NABCEP Certified
> Solar PV 740-448-7328 *http://athens-electric.com/
>
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Re: [RE-wrenches] Lithium ion for 12 V system

[David Katz]

K-2 in Henderson NV has 12v Lion batteries with BMS
David Katz

On Sat, Oct 27, 2018 at 8:19 AM 
wrote:

>
> An off grid system owner contacted me, looking for a L-ion battery for a
> 12 V system. Does such a thing exist?
>
> Thanks,
>
> Drake
>
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Re: [RE-wrenches] Ni-Fe update?

[David Katz]

AEE Solar sold NiFe batteries from Russia in the late 1990s.  They last a
long time but were hard to use with inverters.  A 12 volt pack has 10
cells. Each cell reaches full charge at 1.7 volts so the pack would be at
17 volts. that is 68 volts in a 48 volt pack.  inverters turn off for
over-voltage before that.  When they are operating the cells are at 1.2
volts.  The charge efficiency is about 60% when you look at watt hours in
vs. watt hours out.  They also use a lot of distilled water.  I had a set
that required watering every 3 weeks.  I did not keep up with watering once
and one of the cells exploded when the water level got below the plates.
I would suggest L-ion batteries instead.
David Katz

On Wed, Nov 21, 2018 at 10:37 AM Ray  wrote:

> Charge efficiency is really low,  Charging parameters can be hard to get
> right, Voltage is not stable under heavy loads, and they are really
> expensive to boot.  I've never sold them for these reasons, but I have
> replaced some sets that customers were unhappy with.  They seem to work OK,
> only if there are no large surge loads, and the battery and array are sized
> large enough.  Unfortunately because of the cost, folks seem to really
> under size them, which only exasperates the above issues.
>
> There's good reasons this old battery chemistry has not been widely
> adopted by the solar industry.  It does have its place, and I understand
> the train industry uses it because A) they have cheap on grid charging
> available, so efficiency doesn't matter, and B) they have telecomm type
> loads with very little surge.
>
> Ray Walters
> Remote Solar
> 303 505-8760
>
> On 11/21/18 10:55 AM, d...@foxfire-energy.com wrote:
>
> Hi Guys, I have a potential customer inquiring about installing a pre
> packaged Iron Edison system.. I recall hearing strange stories about Ni-Fe
> batteries but don't recall the specifics. I have done a few searches with
> mixed results.. And have friends advising I run like a Rabbit.. Thought I'd
> run it by you folks for an update..
> Thanks, and Happy Turkey Day.
>
> db
>
>
> Dan Brown
> Foxfire Energy Corp.
> Renewable Energy Systems
> (802)-483-2564
> www.Foxfire-Energy.com
>
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Re: [RE-wrenches] Hober Pumps Reviews?

[David Katz]

Hi Guys.
I have been testing pumps from China for about a year. I recently got a
Hober that will pump 400 feet.  It has a 3-phase brushless motor and a
helical rotor.
I will start testing it soon. It looks really good, as do the others I am
testing. They are all excellent looking knockoffs of Grundfos and Lorentz.
David Katz

On Sat, Jan 5, 2019 at 9:06 AM William Dorsett 
wrote:

> Jay, thanks for your response. Do you have or anyone close, actual
> experience with Hober?  At 230 ft, plus as Dan suggested, we have to add
> the head to the storage tank. At that depth ShurFlo would run through
> diaphragms quickly and in a place where a bicycle represents middle class,
> that cost could be unsustainable. Centrifugal pumps really bog down at that
> depth, even from 270 gals per day it’s going to take quite a few watts to
> spin water to the surface. It’s not obvious that Hober  has pump curves
> available on their website, and very little about their pumps.
>
>
>
> Again thanks.
>
>
>
> Bill Dorsett
>
> “Start where you are. Use what you have. Do what you can” Arthur Ashe
>
> 1715 Leavenworth
>
> Manhattan, KS  66502
>
> www.fhreec.org
>
>
>
> 785/539-1956  Office
>
> 785/564-2583  Cell
>
> wmdors...@cox.net
>
>
>
> *From:* RE-wrenches  *On
> Behalf Of *jay
> *Sent:* Wednesday, January 02, 2019 10:19 PM
> *To:* RE-wrenches 
> *Subject:* Re: [RE-wrenches] Hober Pumps Reviews?
>
>
>
> Hi William
>
>
>
> I would steer you way way clear from the Shurflo 9300.  It’ll break, they
> won’t have parts and it’ll never get rebuilt.
>
>
>
> The Hober uses the most common  international design which is a DC to AC
> 3phase variable speed pump controller, basically an inverter.
>
> It then runs any 3 phase pump within its wattage parameters. These pumps
> are everywhere, cheap, pretty efficient and extremely reliable.  There are
> many many of these inverters/controllers on the market.
>
>
>
> It is really hard to get good data on how to size the PV watts to pump
> watts using these inverters. Unlike a DC positive displacement pump which
> will still pump but more slowly if low DC input, the centrifugal pump’s
> output drops off dramatically if you get below its operating window.  And
> that window is dependant on the pump specs vs flow vs dynamic lift.
>
> So need more water, add more PV, double PV watts to running watts as a
> bare minimum.  And specify a pump that is pumping in the bottom of the
> curve instead of near the top helps to allow it to produce better during
> lower PV watts input.
>
>
>
> Good luck,
>
>
>
> Jay
>
>
>
> Peltz power
>
>
>
>
>
>
>
>
>
>
>
>
>
> On Jan 2, 2019, at 4:44 PM, William Dorsett 
> wrote:
>
>
>
> Happy New Year Wrenches  From a young lady who is trying to bring clean
> water to a village in Uganda:
>
>  “ This is Rosanna Bauman from Garnett. I'd talked to you about 2
> years ago about solar pumps for our friends in Uganda. We installed the
> solar panels but are just now getting the money saved up for the
> well-drilling. We have clean water located 75 meteers below, no rock.
> Looking at a Shur-flo or a Hober. We can get the Hober shipped direct from
> China to Uganda DHL, plus it's about $200 less.  However, we would like
> some advice as to their reliability. We want something reliable.
>
> Have any of your Solar Wrenches used or heard of this company? Looking at
> using a 3000 liter/day pump to pump 1,000 liters, since it will be directly
> tied to solar power, no battery back-ups.
>
> You're welcome to call me if you have questions!
>
> Thanks!
>
>   Rosanna Bauman”
>
>
>
> Thanks for your thoughts
>
> Bill Dorsett
>
> “Start where you are. Use what you have. Do what you can” Arthur Ashe
>
> 1715 Leavenworth
>
> Manhattan, KS  66502
>
> www.fhreec.org
>
> 785/539-1956  Office
>
> 785/564-2583  Cell
>
> wmdors...@cox.net
>
>
>
>
>
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[RE-wrenches] Heliene PV Modules

[David Katz]

Does anyone have experience with Heliene modules?  Are they a good USA made
module?
Thanks
David Katz
Backwoods Solar
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Re: [RE-wrenches] Anyone recognize this pole mount system?

[David Katz]

Timothy,
They are definitely NOT Tamarack.  I doubt you can bring them up to code.
Current code is 115 MPH.  Tamarack is currently working on certified
engineering on their pole mounts for up to 150 MPH wind and up to 50 PSF of
snow load. I can see that the one on the orange pole is not going to make
an engineer happy.  That one definitely looks home made.
David Katz
Tamarack Solar Products

On Thu, Mar 14, 2019 at 1:12 PM Timothy Econopouly <
tim.econopo...@suncommon.com> wrote:

> They look like vintage Tamarack or MT Solar top of pole mounts
>
> On Thu, Mar 14, 2019 at 3:32 PM Ray  wrote:
>
>> That's my call too, The Unirac TPM was truly an inferior product, and
>> would both change tilt and rotate on the pole in high winds.  It needs to
>> be pinned to the pole and have bracing added to hold its tilt.  The other 2
>> look possibly home made, there are quite a few of those around; folks have
>> some welding equipment and go for it themselves.  I recently replaced a
>> horrible home made pole mount made out of Unistrut, the whole thing could
>> barely hold up the weight of the modules.  Yours don't look too bad,  but I
>> would give it the old field test: grab out on one corner and put your full
>> weight on it to see how it behaves.  I also like to shake it up and down at
>> the right frequency to see how it behaves too.  It really should be strong
>> enough for a person to be able to crawl around on it.
>>
>> The tilt angle looks really extreme, many racking companies do not rate
>> their systems for tilt beyond 45 degrees.
>>
>> Also, I would write up some disclaimer  to release yourselves from
>> liability.  It should note the substandard racking, the potential for
>> failure in high winds or snow loads, and that the customer has chosen not
>> to replace the racks.
>>
>> Ray Walters
>> Remote Solar
>> 303 505-8760
>>
>> On 3/14/19 1:18 PM, Howie Michaelson wrote:
>>
>> Not sure about the grey steel bracketed one, but the other 2 (?) look
>> like the old Unirac TPMs, which haven't been in production for more than 15
>> years (?).
>> Howie
>>
>> *Howie Michaelson **Sun Catcher*
>>
>> *NABCEP Certified Solar PV Installer™ *
>>
>> *Solar Electric Systems Sales & Service 802-272-0004*
>>
>>
>> On Thu, Mar 14, 2019 at 3:11 PM Lorenzo Ortiz 
>> wrote:
>>
>>> Wrenches,
>>>
>>> Anyone recognize these pole mounts?
>>> We adopted a bastard system and are trying to bring it up to code.
>>>
>>> Thanks
>>>
>>> --
>>>
>>> Loren Ortiz
>>> Technical PV Design Specialist - Commercial/Residential/Off-Grid
>>>
>>> lo...@cal-solar.com californiasolarco.com
>>> *Main: 530-274-3671 ext: 311 * *Fax: 530-274-7518*
>>>
>>>
>>>
>>>
>>>
>>> <https://californiasolarco.com/referral_form/>
>>> *Showroom located at: 149 E Main St. Grass Valley, CA 95945*
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Re: [RE-wrenches] Retrofit BMS

[David Katz]

I have used Nuvation BMS with Nissan Leaf batteries in a off grid hone.
They have been running for 2 years and the cells are staying within 0.02
volts.
There are a lot of parameters to set but their tech help is great. They can
drive 4 relays based on almost anything you can think of and they also have
modbus output.
David Katz

On Fri, May 3, 2019 at 2:47 PM Andrew Truitt  wrote:

>
> Wrenches - I have an opportunity to take possession of some lightly used 2
> kWh Lishen LFP battery packs for next to nothing.  What's the catch?  No
> BMS.  Anyone have any experience retrofitting a BMS on Li+ batteries?  This
> looks interesting <http://electrodacus.com/>, and this EV BMS
> <https://www.orionbms.com/>is theoretically compatible with PV, but I'd
> love to compare with something a little more proven.
>
>
>
> *Regards, *
>
>
> *Andrew Truitt*
>
> www.dr.ventures
> d: 202.486.7507
>
> NABCEP Certified PV Installation Professional ID: 032407-66
> Colorado Journeyman Electrician License No.: 600132
>
> [image: Logo]
>
>
>
> The content of this email is confidential and intended for the recipient
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Re: [RE-wrenches] 12v solar direct greenhouse fan

[David Katz]

Snap Fan makes great ones. Snap-fan.com
David Katz

On Fri, May 17, 2019 at 5:40 AM David Palumbo  wrote:

> I have an old off grid customer looking for a greenhouse fan, about 20”,
> to run direct off an old 48w 12v module.
>
>
>
> Backwoods is listing DC Super Fans that say battery based and not intended
> to operate direct from solar module.
>
>
>
> Where can we get a fan to fit the bill for PV direct operation?
>
>
>
> Thanks,
>
> Dave Palumbo
>
> Hyde Park, VT
>
>
>
> Sent from Mail <https://go.microsoft.com/fwlink/?LinkId=550986> for
> Windows 10
>
>
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Re: [RE-wrenches] Large off-grid inverter/storage

[David Katz]

The sentence “25KW per hour“ does not make sense. Do they mean 25KWh per
hour? That would be 600 KWh per day! That would require over 200KW of PV.
David Katz

On Thu, Sep 5, 2019 at 3:33 PM Dave Angelini Offgrid Solar <
offgridso...@sti.net> wrote:

> I often find that numbers like 25KW per hour are just overblown and the
> rest of the Offgrid load power data is too high.
>
> Offgrid is all about the state of the art in not needing high power levels
> by using the best equipment available for the loads.
>
> One can't simply take a power bill from a utility and try to duplicate it
> offgrid. The loads have to be reduced drastically.
>
> Maybe this is not the case here and if so I digress. Good Luck
>
> *Dave Angelini Offgrid Solar
> "we go where powerlines don't"
> http://members.sti.net/offgridsolar/ <http://members.sti.net/offgridsolar/>
> e-mail  offgridso...@sti.net 
> text 209 813 0060*
>
> On Thu, 5 Sep 2019 16:16:27 -0600, "Dana"  wrote:
>
> You will have to park the ‘Package’ somewhere… Yeah off grid takes space &
> WLA batteries like to be warm in the winter & not too hot in the summer.
>
> Basements? Dedicated building? Storage container [insulated]?
>
> Radiant floors make for happy batteries. Cool in summer & warm in winter.
>
>
>
>
>
>
>
> Dana Orzel  Great Solar Works, Inc.
>
> *C - 208.721.7003   d...@solarwork.com
> *
>
> Idaho Contractor - # 028765 Idaho PV # 028374
>
> NABCEP # 051112-136   www.solarwork.com
>
> "Responsible Technologies for Responsible People since 1988"
>
> *P* Please consider the environment before printing this email.
>
>
>
>
>
> *From:* RE-wrenches  *On
> Behalf Of *Andrew
> *Sent:* Thursday, September 05, 2019 3:15 PM
> *To:* RE-wrenches 
> *Subject:* [RE-wrenches] Large off-grid inverter/storage
>
>
>
> Hey Everyone,
>
> I have been recently been getting more and more inquiries
> for some quite large off-grid sytems(25kw per hour) and seeing what you
> guys have for suggestions on bigger inverters and storage systems?  I could
> do 2 triple stack Schneider’s and a bunch of HUPS industrial batteries but
> it all just takes up so much space and I know there are some other
> companies out there with package units. Thoughts?
>
>
>
> Andrew Perkins
>
> Greenwired
>
> P: 707-923-2001 ext. 100
>
> 1150 #1 Evergreen Rd
>
> Redway, CA 95560
>
> www.greenwired.com
>
> [image: Description: signature]
>
>
>
> --
>
>
>
>
>
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Re: [RE-wrenches] replacement Solarworld Sunmodule SW plus 250 poly clear frame

[David Katz]

SolarWorld is back in business


Sky is the limit...
 The possibilities
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are endless...
   One of the best
Solar Products
  Installation and Service Supplier
,
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We the pioneer in the Solar industry are back with the bang!! With over 40
years of experience and expertise in delivering high performance, from
small to large scale projects across all regions we are the One Stop Shop
for all your Solar needs.
We are humble and thrilled to start our journey fresh on full swing.
  SOLARWORLD
WE ARE BACK! www.solarworld.com.sg
Contact Us Today:
SolarWorld Asia Pacific Pte Ltd
Ph: +65-68423886 | +65-97730261| +49 (0)1728224282
Email: service-singap...@solarworld.com.sg



 SAVE ENERGY SAVE MONEY SAVE THE PLANET


On Fri, Sep 13, 2019 at 4:59 PM John Blittersdorf <
john.blittersd...@gmail.com> wrote:

> Jibril,
> I have a solarworld 250 poly clear frame that has been used only as a
> display panel at shows and events.  Contact me off list or give me a call.
>   Can send a photo of it to make sure it looks like the ones you have.
>
> John Blittersdorf
> 200 West Road
> <https://www.google.com/maps/search/200+West+Road?entry=gmail&source=g>
> N Chittenden, VT 05763
>
> john.blittersd...@gmail.com
> 802-770-8625 voice and text
>
> On Fri, Sep 13, 2019 at 7:39 PM James "Jibril" Gustafson <
> djibrilf...@gmail.com> wrote:
>
>> Sadly, today my crew managed to shatter the glass on a Solarworld module
>> that we had removed from a hail damaged, then re-roofed, roof.  The client
>> is really ready to have system running again, and a 30 minute Google search
>> found no available replacements.  Does any one know where I might lay my
>> hands on one of these?
>>
>> Thanks,
>> Jibril
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Re: [RE-wrenches] Convex modules

[David Katz]

Yes. I think that response was lacking.  And it was dated over a year ago.

On Mon, Nov 18, 2019 at 9:21 AM Jerry Shafer 
wrote:

> David, Wrenches
> I do not see anything talking about glass just the frame and even if they
> included glass 1 mm over 1m this is still out of that tolerance, to me it
> sounds like poor quality control or is internally considered acceptable.
> Jerry
>
> On Mon, Nov 18, 2019 at 7:04 AM David Katz 
> wrote:
>
>> Here is a response from Jinko:
>>
>>
>>
>> On Mon, Nov 18, 2019 at 7:39 AM Jerry Shafer 
>> wrote:
>>
>>> Wrenches
>>> In the way back when years Sharp had one then two braces across the
>>> short side and stronger frames.
>>> Regarding the glass issue to me it sounds like poor quality and little
>>> QC of products. Again years ago l had a shipment of SolarWorld modules that
>>> the frames were bowed out on the long side, l contacted them and they
>>> stopped production to fix the problem, what has this module manufacturer
>>> said?
>>>
>>> On Mon, Nov 18, 2019, 7:24 AM Jeff Clearwater <
>>> je...@villagepowerdesign.com> wrote:
>>>
>>>> Yes good thought Jay but it strikes me if we are trying to offset the
>>>> results of anticipated bowing with crowning its time for a beefier frame or
>>>> thicker glass. REC modules went with 2 cross bars in their frame when going
>>>> to 72 cell. I’ve been  observing frames get thinner over time - wondering
>>>> how a 30 mm frame could do the job on 72 cell mods when we used to have
>>>> twice that on 60 cell mods. It’s great to save aluminum and weight but not
>>>> at the expense of panel life. Can’t imagine the impact resistance goes up
>>>> with less support never mind possible degradation to the wafers due to
>>>> flexing?
>>>>
>>>> Any panel manufacturers on the List that can comment?  Any other
>>>> modules besides RECS using cross bars?
>>>>
>>>> Thanks
>>>>
>>>> Jeff Clearwater
>>>>
>>>> Sent from my iPhone
>>>>
>>>> On Nov 17, 2019, at 2:25 PM, Jay  wrote:
>>>>
>>>> I’m wondering if it’s designed to account for gravity sag once the
>>>> modules are mounted. Lots of modules I’ve seen especially the larger format
>>>> ones seem to be concave with time.
>>>>
>>>> If I understand correctly, these are bowed up which would allow them to
>>>> settle flat?
>>>>
>>>> Jay
>>>>
>>>>
>>>>
>>>> On Nov 17, 2019, at 2:17 PM, Kristopher Schmid 
>>>> wrote:
>>>>
>>>> 
>>>> The banding is a good thought, Glenn, except that the one module that
>>>> was oriented the opposite way was deformed in the opposite direction.  This
>>>> rules out the forklift idea, too.  I will check specs.  I doubt that
>>>> testing will reveal anything immediate, but I'm a bit concerned about the
>>>> potential long term effects.
>>>>
>>>> On Sat, Nov 16, 2019, 9:12 AM Kristopher Schmid 
>>>> wrote:
>>>>
>>>>> So, I opened up a pallet of Jinko 400 watt half cell modules yesterday
>>>>> and noticed that every module was convex to the glass side.  The center 
>>>>> was
>>>>> 1/4 inch higher than the corners.  Has anyone else seen this?  Should I be
>>>>> concerned?  Manufacturing issue?  Intentional?
>>>>>
>>>>> Thanks,
>>>>> Kris
>>>>>
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Re: [RE-wrenches] Top of Pole Mount recommendations

[David Katz]

Tamarack Solar Products has Top-of-Pole mounts with stamped engineering
drawings for that wind speed, but only up to 6 modules per mount
David Katz

On Wed, Dec 11, 2019 at 8:35 AM Lou Russo  wrote:

> Aloha Wrenches,
>
> I have a project that I originally called out Preformed Line Products's
> 15,14, and 9 panel TPM product. It has come to light that the product will
> not meet the AHJ (County of Hawaii) requirements. Which is ASCE 7-10 135
> mph.
>
> So now I am on the hunt.
>
> Anybody got a recommendation?
>
> As always, thank you.
>
> Aloha,
>
> Lou Russo
> l...@spreesolarsystems.com
> 808 345 6762
> Spree Solar Systems LLC
> CT-34322
>
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[RE-wrenches] Lithium Ion Batteries

[David Katz]

Hello Wrenches,
I am working with some people that want to use a 20 kw-hour to 30 kw-hour
48 volt lithium-ion battery with an Outback Radian and Outback FM charge
controllers.
They are considering using Discover, Blue-Ion, Battle Born or SimpliPhi
batteries.
Does any one have any recommendations of which battery functions best with
the Outback system.
Thanks,
David Katz
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Re: [RE-wrenches] 250KW-500KW Off-grid Inverters?

[David Katz]

If you are working in Africa, Asia, or Europe the AC output  is 380-400
3-phase or 230 1-phase without the 120V center tap.
If you are working on a country that used to be a puppet government of the
USA it will be 120, 240 480 etc.
David Katz

On Mon, Apr 13, 2020 at 1:37 PM Kirk Herander  wrote:

> Delta inverters with Blue ion and/or  Dellta's own battery pack.
>
> On 4/13/2020 4:18:15 PM, Jeff Clearwater 
> wrote:
> Hey There Esteemed Wrenches,
>
> Okay so hospitals all over the world are clambering for battery-inverter
> systems and now with potential international funding not available before.
> Goal is to replace diesel and higher reliability - we'll add solar later as
> we go.
>
> But most medical clinics and small hospitals in the developing world are
> needing 100KW-500 KW systems.
>
> I'm aware of the Dynapower Inverters out of S. Burlington Vermont- they
> offer a 500KW, a 250 KW and a 125 KW at 800-1500 VDC and 480 and 600 VAC 3
> ph.
>
> Anyone have direct experience with them?
>
> What other alternatives should we consider?
>
> Thanks!
>
> Jeff
>
> --
> ~~~
> Jeff Clearwater
> Village Power Design
> linkedin <https://www.linkedin.com/in/jeff-clearwater-0622a312/>
> www.villagepowerdesign.com
> cell - 413-559-9763
> ~~~
>
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Re: [RE-wrenches] Solis inverters

[David Katz]

I have used 4 of the 3.6 kw and 4 kw units. They have all worked
flawlessly.
They have been well vetted by Sunrun.
David

On Tue, May 5, 2020 at 1:27 PM Jay  wrote:

> Hi all,
>
> Are there any comments about Solis inverters?
>
> Specifically the 10kw single phase?
>
> GINLONG, SOLIS-1P10K-4G-US-SA2-NE,
>
> Thanks
>
> Jay
>
> Peltz power.
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Re: [RE-wrenches] cast-in-place ballasted ground mounts

[David Katz]

Hi Kirk,
Check out DiamondPiers.  They say that they are equal to a 24" diameter, 5
foot deep concrete pier and require no concrete.  You just need a
jackhammer type tool.  I have not tried them.  They could be good for
multipole ground mounts
https://www.diamondpiers.com/how-it-works
David Katz

On Mon, May 18, 2020 at 7:13 AM Kirk Herander  wrote:

> Hi,
> Looking for info on smaller (50kw or less) suppliers of cast-in-place
> ground mount systems Thanks.
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Re: [RE-wrenches] Charging a Bolt with an SW

[David Katz]

The old SW waveform changes with battery voltage.  On the 24 volt version
there are less steps when the battery is over 28 volts. My washing machine
motor does not run when the battery is over 28.  I just have to turn on the
microwave when I want to do laundry on a sunny day.
David

On Sun, Jun 7, 2020 at 1:05 PM Jay  wrote:

> I’ve got offgrid  2 clients and they have no issues.
>
> They each have a Bolt and can choose the charging rate. They can run it at
> either power. But only use higher power when they have lots of sun.
> Older Stacked vfx and Schneider xw, no issues.
>
> I would expect the SW to work, however it’s an odd beast as it’s waveform
> steps change with load. More load, more steps, therefor cleaner so maybe at
> lower charge rate it’s not clean enough.
>
> As to your issue it could be power factor Being really poor.
> Can you tell us what inverter, yea 5 years ago is a long time.
>
>
>
> Jay
>
> Peltz power.
>
>
>
>
>
> On Jun 7, 2020, at 11:53 AM, Darryl Thayer  wrote:
>
> 
> I think you said it well, about 5 years ago I tried to charge a car from
> an off-grid system.  I did not record my events but the inverter had twice
> the power of the level two charger, yet the inverter would get hot and trip
> out.  I was told a ferroresonant transformer may help, and it might be
> different with different cars.  However, I was warned the ferroresonant was
> to stop input wave problems from arriving at the output not to prevent the
> output wave problems showing up on the input.   The off-grid customer gave
> up.
>
> On Sun, Jun 7, 2020 at 6:36 AM Hilton Dier III 
> wrote:
>
>> The issue with EV chargers is that they create a lot of reactive power.
>> Think of it as "slosh" in the waveform. That means that charging at 2,000
>> watts sloshes a lot more than 2kW through the cable, plug, outlet, and from
>> the inverter. If you've got a reasonably good sinewave inverter the charger
>> will like it fine. However, the inverter might not like the charger if you
>> cut things too close. Make sure to have a lot of top end left in your
>> inverter. Always use a transformer based inverter. The SW series has a big
>> chunk of metal in it, so that's good. At 120V the Bolt will only draw 1440
>> watts max.
>>
>> An aftermarket Bolt 240V charger can draw up to 32 amps. That's 7.7 kW,
>> so too big for an SW. Treat it more like 40 amps. The OEM 120/240 EVSE
>> (smart charging cord) that comes with the car can draw 8 or 12 amps at 120V
>> or 12 at 240V. Assume that the 8 amps is really 12 and the 12 is really 15
>> or a bit more. I have seen 15 amp plugs and outlets with the hot prong
>> melting plastic around it. The plug on the OEM EVSE is 20A rated but make
>> sure your outlet is as well.
>>
>> --
>> Hilton Dier III
>> Missisquoi River Hydro
>> Renewable Energy Design
>>
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[RE-wrenches] Cheap solar

[David Katz]

Wrenches,
Here is a really scary link.  the guy is selling a book for $50 that 
shows you how you can build your  own PV module for $125.

http://www.power4home.com/index.php?hop=roeib
Cheers

David Katz


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Re: [RE-wrenches] Solar power Magic

[David Katz]

Bob-O
I see a use for SolarMagic from National Semiconductor in large systems 
with many parallel strings, installed by inexperienced contractors who 
put some of the strings in the shade, not realizing how little you  get 
with minimal shading of one string in parallel strings of modules.  They 
might have to buy these to appease the system owner who is not getting 
what they expect from their system.
They Tigo converter is very interesting and has an MSRP of $56.  At this 
price it will make some sense.

Cheers,
David

David Katz

President

AEE Solar

1155 Redway Drive

P.O. Box 339

Redway, CA  95560

Tel (707) 825-1200

Fax (707) 825-1202

da...@aeesolar.com <mailto:da...@aeesolar.com>

www.aeesolar.com <http://www.aeesolar.com>



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Bob-O Schultze wrote:

Hiya Dana,
No to all those things, but... I'm told they are about $200 a pop. Say 
they increased output by a total of 5%. Seems unlikely, but say they 
did. Speaking in retail, $200 represents what these days... 40 watts 
or so including racking, give or take? Say you are using a 200W 
module. 5% = 10W. Hm. I can envision some tight spots where that 
might pencil, but not many.

Bob-O


On Jul 26, 2009, at 5:41 PM, Dana wrote:

Does anyone have any experience with these units?
 
Do they work with off grid lower voltages?
 
Do they work with all controllers?
 
Do they affect MPPT function positively or negatively?
 
Do they work well with Grid tie?
 
How would you gauge the increased performance?
 
 
Dana Orzel
 
Great Solar Works, Inc

www.solarwork.com <http://www.solarwork.com>
E - d...@solarwork.com <mailto:d...@solarwork.com>
V - 970.626.5253
F - 970.626.4140
C - 970.209.4076
“I'd put my money on solar energy… I hope we don't have to wait 'til 
oil and coal run out before we tackle that.”
—Thomas Edison, in conversation with Henry Ford and Harvey Firestone, 
March 1931




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Re: [RE-wrenches] High snow load on PV Modules

[David Katz]

Tump,
Mitsubishi makes the modules for Shuco with the cross bar.  The sell the 
same module directly.  REC modules are also rated at 5400pa. they do it 
with thicker glass.  Those Norwegians know snow load.

David

David Katz

President

AEE Solar

1155 Redway Drive

P.O. Box 339

Redway, CA  95560

Tel (707) 825-1200

Fax (707) 825-1202

da...@aeesolar.com <mailto:da...@aeesolar.com>

www.aeesolar.com <http://www.aeesolar.com>



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Re: [RE-wrenches] Watt-hour meter

[David Katz]

You can use a standard 120 vac kwh meter in an RV base and add an 
extension cord cut in half for input and output.


David Katz

President

AEE Solar

1155 Redway Drive

P.O. Box 339

Redway, CA  95560

Tel (707) 825-1200

Fax (707) 825-1202

da...@aeesolar.com <mailto:da...@aeesolar.com>

www.aeesolar.com <http://www.aeesolar.com>



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Eric Andrews wrote:


I'm looking for a Watt-hour meter that is hard-wired (not a 
Kill-O-Watt plugin) and resembles a kW-h utility meter for a 
trade-show display...


 

 


Eric R. Andrews

NABCEP Certified PV Installer

 


Eco Solar, Inc.

www.ecosolarnow.com

 


PO Box 5194

Klamath Falls, OR 97601

541-281-8252 cell

541-273-3200 office

mailto:e...@ecosolarnow.com <mailto:e...@ecosolarnow.com>

 


/Saving the World...  One Solar Panel at a Time!/

 

 




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Re: [RE-wrenches] High snow load on PV Modules

[David Katz]

I think Open Energy is in bankruptcy now.

David Katz

President

AEE Solar

1155 Redway Drive

P.O. Box 339

Redway, CA  95560

Tel (707) 825-1200

Fax (707) 825-1202

da...@aeesolar.com <mailto:da...@aeesolar.com>

www.aeesolar.com <http://www.aeesolar.com>



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P  Please consider the environment before printing this e-mail.



Brian White wrote:
When I worked for Open Energy, we installed their tile product at 
Sierra Nevada College in Incline Village. I do not recall what they 
state as the official snow load rating, but I know that the tiles can 
be walked on with out causing damage / glass breakage. This was one of 
the aspects I spent a lot of design time on to make sure high snow 
loads were possible. The tile has a polymer base that supports the 
back of the glass as opposed to traditional extruded aluminum rails 
that grab around the edge of the glass.
 
Suntech is now manufacturing and branding the tile product for Open 
Energy (Suntech has the licensing rights) but I do not think that they 
are on the CEC list yet under Suntech's name. If interested, send 
inquiries to so...@eagleroofing.com <mailto:so...@eagleroofing.com>, 
or additional information and product specs can be found at 
http://www.openenergycorp.com or http://www.appliedsolar.com.
 
The product may not make economical sense if the customer is not 
installing a concrete roof tile roof, but it does meet the snow load 
rating request, so I thought I would post.
 
Brian C. White

Sr. Design Engineer - PV Systems
 
Eagle Roofing Products

120 North Auburn Street - Suite 212
Grass Valley, CA  95945
Phone: 530-273-2948
Cell: 530-575-5550
e-mail:* **bri...@eagleroofing.com* <mailto:bri...@eagleroofing.com>
 
 



*From:* re-wrenches-boun...@lists.re-wrenches.org on behalf of Tump
*Sent:* Tue 7/28/2009 4:15 AM
*To:* re-wrenches@lists.re-wrenches.org
*Subject:* [RE-wrenches] High snow load on PV Modules

I am looking for some information o PV modules that are rated to 
withstand 240lbs/sqft.
I have a friend that lives in Tahoe City, CA & the roof is 4/12 
pitch,  engineering is requiring panels to meet those requirements. 
Any of you northern climate wrenches know anything that may be helpful?

Bill B you have anything? As always thanks in advance TUMP


 t...@hughes.net
  *www.SWNL.net
* <http://www.swnl.net/>*   Serving Mid Coast Maine & Northern California
 Me.# 207-832-7574  Cl.#  610-517-8401

    MAINE'S CHARTER 
   _  NABCEP"Certified PV Designer & Installer"_* _
_  
*    MAINE'S CHARTER 

   _Trace Xantrex "Certified" Dealer / Installer"
_/  
/*


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Re: [RE-wrenches] Subterranean solar panels

[David Katz]

This is a stupid idea.  It is probably a hoax.
David

David Katz

President

AEE Solar

1155 Redway Drive

P.O. Box 339

Redway, CA  95560

Tel (707) 825-1200

Fax (707) 825-1202

da...@aeesolar.com <mailto:da...@aeesolar.com>

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Re: [RE-wrenches] Shell Solar RV20 PV charge controller

[David Katz]

Randy
Some of the RV20 charge controls were made by Specialty Concepts in 
California ((818)-998-5238) and some were made by GoSolar in Victoria, 
Canada.  If it is a GoSolar version you should throw it away.  Shell 
sold everything they had to us about 5 years ago.  We tossed the GoSolar 
units and sold the Specialty Concepts one at very low prices.
If it is a Specialty Concepts unit, it will have a square pot at the 
bottom of the circuit board on the back. Counter-clockwise lowers the 
voltage.  They were originally set to charge to 14.4 volts.  That is 
safe for most sealed batteries considering there will be some voltage 
drop in the wiring.  There is no feature for equalization to worry about 
with sealed batteries.

David

David Katz

Chief Technical Officer

AEE Solar

1155 Redway Drive

P.O. Box 339

Redway, CA  95560

Tel (707) 825-1200

Fax (707) 825-1202

dk...@aeesolar.com <mailto:da...@aeesolar.com>

www.aeesolar.com <http://www.aeesolar.com/>



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Randy Brooks wrote:

Fellow Wrenches,

Does anyone have a manual for an old Shell Solar RV20 PV charge 
controller?  Or know where I can get a copy.  I searched the web 
without success.  I'd like to know if the charge settings are 
adjustable for sealed batteries.


Thanks,

Randy Brooks

Brooks Solar, Inc.

*/Solar Power for People/*

140 Columbia View

Chelan, WA  98816

509-682-9646

ra...@brookssolar.com <mailto:ra...@brookssolar.com>

www.BrooksSolar.com




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Re: [RE-wrenches] "Name that solar module" guessing game!

[David Katz]

Mick,
If these modules have failed, it is a good bet that they are Kyocera 
J-51s  
David


David Katz

Chief Technical Officer

AEE Solar

1155 Redway Drive

P.O. Box 339

Redway, CA  95560

Tel (707) 825-1200

Fax (707) 825-1202

dk...@aeesolar.com <mailto:da...@aeesolar.com>

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Re: [RE-wrenches] Great service at the wholesale level?

[David Katz]

I am certainly interested in which wholesale distributors offer good 
service, if any.

David

David Katz

Chief Technical Officer

AEE Solar

1155 Redway Drive

P.O. Box 339

Redway, CA  95560

Tel (707) 825-1200

Fax (707) 825-1202

dk...@aeesolar.com <mailto:da...@aeesolar.com>

www.aeesolar.com <http://www.aeesolar.com/>



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Wind-sun.com wrote:

And where exactly would that be?
 
..

Northern Arizona Wind & Sun - Electricity From The Sun Since 1979
Solar Discussion Forum: http://www.wind-sun.com/ForumVB/
..

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Re: [RE-wrenches] SW4024 compatibility question

[David Katz]

Allan
Ask Greg Thomas at Outback. He wrote the software.
David

David Katz

Chief Technical Officer

AEE Solar

1155 Redway Drive

P.O. Box 339

Redway, CA  95560

Tel (707) 825-1200

Fax (707) 825-1202

dk...@aeesolar.com <mailto:da...@aeesolar.com>

www.aeesolar.com <http://www.aeesolar.com/>



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Allan Sindelar wrote:


Esteemed Wrenches:

Wrench esoterica time... another contest like Mick's to win the chance 
to take time off...


 

A customer has a late-2005 SW4024 with Rev. 4.30 firmware. He needs to 
add a second inverter for series stacking to increase output to run a 
big well pump. We have an early SW4024 with Rev 1.0 firmware, and we 
have both Rev. 4.01 and 4.10 firmware chipsets in our parts archives. 
Are the two inverters compatible if series-stacked with a firmware 
upgrade?


 


Thank you.

 


Allan Sindelar

al...@positiveenergysolar.com <mailto:al...@positiveenergysolar.com>

NABCEP Certified Photovoltaic Installer

EE98J Journeyman Electrician

*Positive Energy, Inc.*

3201 Calle Marie

Santa Fe, New Mexico 87507

505 424-1112

www.PositiveEnergySolar.com <http://www.positiveenergysolar.com/>

 




  
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Re: [RE-wrenches] Evergreen - now what?

[David Katz]

GE makes their modules in China, and they are going out of module 
production completely soon.

Unisolar makes theirs in Mexico.
Schott brings the cells in from Germany made with silicon from europe
Sharp brings the cells in from Japan made with silicon from Japan
REC makes modules in Sweden from silicon made in the US
David

David Katz

Chief Technical Officer

AEE Solar

1155 Redway Drive

P.O. Box 339

Redway, CA  95560

Tel (707) 825-1200

Fax (707) 825-1202

dk...@aeesolar.com <mailto:da...@aeesolar.com>

www.aeesolar.com <http://www.aeesolar.com/>



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Dave Click wrote:
Jeff, off the top of my head- I think the new Schott modules are made 
in NM, Sharps are at least assembled in TN, and when these get UL 
listed, they will be made in FL (I think they're made somewhere else 
in the US until their factory is ready):

http://www.advancedsolarphotonics.com/
GE and Unisolar too, right? When the Applied Materials modules take 
off, I think we'll see a bunch of those modules made in the US as 
well, though not under the AM brand.


 Original Message 
Subject: Re: [RE-wrenches] Evergreen - now what?
From: Jeff Yago 
To: RE-wrenches 
Date: 2009/11/5 10:00



We are currently waiting on a stack of Evergreen modules (which are 
now very late to ship!) and we were getting ready to order another 
batch, so does this mean we should be looking into another supplier?  
We try very hard to buy USA products, but that is getting harder and 
harder to do.  It looks like its now just SolarWorld in California. 
What other module manufacturers are still actually making their 
modules in US and not importing from China.
 
Jeff Yago

DTI Solar

 


Netscape.  Just the Net You Need.




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Re: [RE-wrenches] Evergreen - now what?

[David Katz]

SolarWorld is made in the US from US silicon. They start with refined 
silicon and make the cells in Oregon, then make the modules in CA.
They have been doing a great job since 1980 when they were ARCO > 
Siemens > Shell ...

They may be the only real US module manufacturer - German owned though.
David

David Katz

Chief Technical Officer

AEE Solar

1155 Redway Drive

P.O. Box 339

Redway, CA 95560

Tel (707) 825-1200

Fax (707) 825-1202

dk...@aeesolar.com <mailto:da...@aeesolar.com>

www.aeesolar.com <http://www.aeesolar.com/>

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Doug Wells wrote:
Moving forward I am sure that module manufacturers will have plants in 
a variety of locations.
Evergreen just expanded its facility in Mass to make the ESA and I 
assume they would still be manufacturing there.
Sharp is in Memphis, but they produce abroad as well. First Solar is a 
good example. They started in little Perrysburg Ohio, and still 
produce there. However they now have plants and offices all over the 
world.
I also like to support American Made but it is a line that is 
continually blurred.
I am 2.5 hours from Evergreen in Mass. but the last Evergreen modules 
I bought were on sale from Germany. Cheaper too.
You will have to stay on top of not just brand, but specifically where 
they were produced.


Doug Wells
The Solar Specialists
Morrisville, VT 05661
(p) 802-223-7014
(c) 802-498-5856
www.thesolarspecialists.com





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Re: [RE-wrenches] strings of older solar panels

[David Katz]

Lee
I would be inclined to use groups of 4 modules wired for 24 volts 
connected to an Enphase inverter.  This will give you less problem with 
mismatch loss. 256 watts is high but they are probably a bit lower in 
output that that.

David

David Katz

Chief Technical Officer

AEE Solar

1155 Redway Drive

P.O. Box 339

Redway, CA  95560

Tel (707) 825-1200

Fax (707) 825-1202

dk...@aeesolar.com <mailto:da...@aeesolar.com>

www.aeesolar.com <http://www.aeesolar.com/>



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Solar Plexus wrote:

Hi Wrenches.

I have a customer with 32 of the Solarex MSX-64 solar panels an a 
battery-based system.  He wants to go batteryless inverter.  So I am 
looking at  2 strings of 16 in series.But the solar panel spec 
sheet doesn't say anything about system voltage rating.  Can I do this?
 If  one solar panel in the string is shaded, does it see the full 
string voltage of around 280 volts?  Is there something in the way new 
panels are made that makes them more able to handle this voltage, or 
is it just that they are now tested for it?
My guess is this request may be happenning a fair amount.  Is there a 
reason these panels are not listed on the California GoSolr website?


Lee Tavenner
Solar Plexus


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[RE-wrenches] Online system sizing software

[David Katz]

Has anyone tried the free online sizing software at

http://www.solardesigntool.com/overview.html

They have a pay version too.  




David Katz

Chief Technical Officer

AEE Solar

1155 Redway Drive

P.O. Box 339

Redway, CA  95560

Tel (707) 825-1200

Fax (707) 825-1202

dk...@aeesolar.com <mailto:da...@aeesolar.com>

www.aeesolar.com <http://www.aeesolar.com/>



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Re: [RE-wrenches] Evergreen EC 110

[David Katz]

Evergreen is making an ES-C series 80 watt and 120 watt modules in 
China.  They do not have the same dimensions as the old EC series.  AEE 
will have them after the new year.

David

David Katz

Chief Technical Officer

AEE Solar

1155 Redway Drive

P.O. Box 339

Redway, CA  95560

Tel (707) 825-1200

Fax (707) 825-1202

dk...@aeesolar.com <mailto:da...@aeesolar.com>

www.aeesolar.com <http://www.aeesolar.com/>



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Bob-O Schultze wrote:

Gro and Evergreen has split the sheets.
AEE, maybe.
Bob-O

On Dec 2, 2009, at 10:34 AM, penobscotso...@midmaine.com wrote:

Hey Tump,
  Evergreen still makes these. I suspect Gro or one of the other
Evergreen dealers stocks them.

Daryl




  

Anyone have one of these around? Please contact me off list. THANKS

<mailto:t...@swnl.net> t...@swnl.net <http://www.swnl.net/>
www.SWNL.net
  Solarwinds Northernlights
  Serving Mid Coast Maine & Northern California
Me.# 207-832-7574  Cl.#  610-517-8401

 Blair "TUMP" May
   MAINE'S CHARTER 
   NABCEP"Certified PV Installer"

   MAINE'S CHARTER 
  Trace Xantrex "Certified" Dealer / Installer"


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Re: [RE-wrenches] dual stacked inverters on 208V service

[David Katz]

Nik,
Since you cannot operate 2 inverters in a 3 phase mode, they will need 
to operate independently, so don't try to sync them.  Operate both 
independently.  if the building is set up for 120/208 there is not 240 
anyway.  You could stack them in 120V synchronized and connected across 
a single phase.  you may be able to stack them at 240 and only connect 
one of the inputs to AC in.

good luck.
David

David Katz

Chief Technical Officer

AEE Solar

1155 Redway Drive

P.O. Box 339

Redway, CA  95560

Tel (707) 825-1200

Fax (707) 825-1202

dk...@aeesolar.com <mailto:da...@aeesolar.com>

www.aeesolar.com <http://www.aeesolar.com/>



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Nik Ponzio wrote:

Hi Gang,

I have a problem. We are installing a gridtie PV system with 2 
battery-based inverters for 240V. The service coming in to the condo 
is 120/208 split-phase fed from 3-phase 208 in main building. The 
master inverter pickups up L1 but the slave inverter will not sync. 
What am I missing?


Thanks and Happy New Year to all!



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Re: [RE-wrenches] Evergreen

[David Katz]

Since modules are getting so inexpensive, the big questions is what is 
the best way to get 33% more power? Is it better to use 33% more modules 
on a fixed array, or use a tracker?  Which one costs less?  It costs 
$1.50 to $2.00 per watt for a tracker.   If modules cost $3 per watt and 
a fixed mount costs $.040 per watt , 33% of $3.40 per watt is $1.12 per 
watt.   And trackers don't come with a 25 year power output warranty.  I 
see tackers making sense when the array is powering a centrifugal pump 
in the summer or possible a time-of-use grid tie that pays more in the 
summer.  You are definitely better off with more modules on a fixed 
array in an off grid situation because you always need more power in the 
winter when the tracker is least effective.

David

David Katz

Chief Technical Officer

AEE Solar

1155 Redway Drive

P.O. Box 339

Redway, CA  95560

Tel (707) 825-1200

Fax (707) 825-1202

dk...@aeesolar.com <mailto:da...@aeesolar.com>

www.aeesolar.com <http://www.aeesolar.com/>



DISCLAIMER:
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Dana wrote:


You got it!

 

It boggles my mind to watch the two OB FM60s and see the difference 
each day and then to go back and see the data over time. It is a very 
good argument for tracking. We have a Durango client that we installed 
12 KW GIT tracked and it is outperforming the expectations of our 
client too.


 


Dana Orzel

 


Great Solar Works, Inc

www.solarwork.com

E - d...@solarwork.com

V - 970.626.5253

F - 970.626.4140

C - 970.209.4076

 


I will be the shift in how the world uses power! - Dana Orzel

 

*From:* re-wrenches-boun...@lists.re-wrenches.org 
[mailto:re-wrenches-boun...@lists.re-wrenches.org] *On Behalf Of 
*Allan Sindelar

*Sent:* Thursday, December 31, 2009 8:13 PM
*To:* RE-wrenches
*Subject:* Re: [RE-wrenches] Evergreen

 


Dana,
Thank you for this information. I would like to clarify what you 
wrote. We have long accepted that trackers may be expected to increase 
daily output by about 35-40% in the summer and 10-15% in the winter, 
due to the differences in the sun's seasonal elevation and the 
resultant length of the solar day. It sounds as if you measured the 
effective increase from approximately summer solstice - winter 
solstice and got a 32% gain. You previously got the same gain (33%) 
measuring from last winter solstice to summer solstice. This makes 
sense, as it averages winter and summer gains over two roughly equal 
periods, with variations (summer monsoons, etc.) being within 
acceptable error.
And whether grid-tied, grid-tied with backup, or off-grid is 
irrelevant as long as you can compare and record the outputs of the 
two otherwise identical arrays, one tracked and one fixed.
Do I understand this right? If so, it's good real-world data for 
design purposes.

Allan

*Allan** Sindelar*
al...@positiveenergysolar.com <mailto:al...@positiveenergysolar.com>
NABCEP Certified Photovoltaic Installer
EE98J Journeyman Electrician
*Positive Energy, Inc.*
3201 Calle Marie
Santa Fe, New Mexico 87507
*505 424-1112*
www.positiveenergysolar.com <http://www.positiveenergysolar.com/>



Dana Orzel wrote:

This is for a grid tied with battery backup Outback system.

The 32% increased gain for the tracker VS. fixed mount production is 
an average of the last 180 days and I checked it in the spring for the 
last 180 days [over the winter] and it was 33%. The 12 -- Evergreen 
180 watt modules produce about 65 -70% of our home and office's 
electrical requirements.


Thanks,

Dana Orzel

Dana,

That 32% is a very useful number, and it matches with our
experience as well. But I need to verify a couple of assumptions,
please:

Does this represent average annual production, rather than peak
seasonal? And is it a grid-tied system?

Thanks,

Allan

 


Allan Sindelar

No virus found in this incoming message.
Checked by AVG - www.avg.com
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Re: [RE-wrenches] Obscure/obsolete QO breaker....

[David Katz]

You can get that from AEE - their part number 053-07819. it is on page 
153 of the catalog.  It is made of a 6 space, 3 phase indoor load 
center, a QO160 and a QO260 and the QD2DTI interlock which is available 
from AEE - 053-02094 in case you want to buy the part separately.

David

David Katz

Chief Technical Officer

AEE Solar

1155 Redway Drive

P.O. Box 339

Redway, CA  95560

Tel (707) 825-1200

Fax (707) 825-1202

dk...@aeesolar.com <mailto:da...@aeesolar.com>

www.aeesolar.com <http://www.aeesolar.com/>



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Chris Daum wrote:
 
Dear folks:


I have a customer working to integrate a couple of older Trace SW2512s into
his system, and he's looking for a Square D part that is no longer available
new, a Square D AC bypass Breaker QO2DT1 (or capital I), consisting of the
Breaker box  QO403L60NS, Breaker  QO160 and Breaker Q0260.

If anyone's got one lying around the shop, please contact me off list.
Thanks and have a great weekend!

Chris Daum
Oasis Montana Inc.
406-777-4309



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Re: [RE-wrenches] Teacher wants a cutaway PV module

[David Katz]

I am pretty sure that tempered glass with shatter as soon as you cut 
into the edge.  That is the nature of tempered glass. 
David


David Katz

Chief Technical Officer

AEE Solar

1155 Redway Drive

P.O. Box 339

Redway, CA  95560

Tel (707) 825-1200

Fax (707) 825-1202

dk...@aeesolar.com <mailto:da...@aeesolar.com>

www.aeesolar.com <http://www.aeesolar.com/>



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Windy Dankoff wrote:

Mick,

If you have a junk module, I'm fairly sure you can cut it up by using 
a lapidary saw - the wet diamond slow-speed kind that gem and mineral 
people use. I mean I'm sure you can cut it. Fairly sure it will not go 
to pieces. I'm not sure there's much to be learned by looking at it, 
but ...


Windy


On Feb 22, 2010, at 1:42 PM, Mick Abraham wrote:


Yo, Wrenchies~

Does anyone offer a sample PV module which would allow a 
cross-section view of the laminate/metal frame?


I told my teacher friend that a laminated glass unit could not be 
sawed in half without totally shattering the glass. I also told him 
that I would ask around to see if anyone makes a cutaway especially 
for show & tell purposes.


Any suggestions would be welcomed. If nothing else maybe we buy some 
of those mini-modules that are potted in plastic, no metal frame, 
then get after it with an angle grinder and a thin cutting wheel. 
That sounds like a lot of carnage but I haven't done any major 
destruction so far this year, so maybe it's time...


Jolliness,

Mick Abraham, Proprietor
www.abrahamsolar.com <http://www.abrahamsolar.com>

Voice: 970-731-4675



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Re: [RE-wrenches] Solar World 175's

[David Katz]

Backwoods Solar has them.
David

David Katz

Chief Technical Officer

AEE Solar

1155 Redway Drive

P.O. Box 339

Redway, CA  95560

Tel (707) 825-1200

Fax (707) 825-1202

dk...@aeesolar.com <mailto:da...@aeesolar.com>

www.aeesolar.com <http://www.aeesolar.com/>



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Warren Lauzon wrote:

Try Hitney Solar, they usually have a few.
 
..

Northern Arizona Wind & Sun - Electricity From The Sun Since 1979
Solar Discussion Forum: http://www.wind-sun.com/ForumVB/
..

- Original Message -
*From:* David Palumbo <mailto:d...@independentpowerllc.com>
*To:* 'RE-wrenches' <mailto:re-wrenches@lists.re-wrenches.org>
*Sent:* Wednesday, January 27, 2010 4:31 PM
*Subject:* Re: [RE-wrenches] Solar World 175's

Does any one have ten SW175's they would like to sell? Or know of
a source for same? I have a project needing 30 and I can get my
hands on only 20 so far. I have tried AEE and have cleaned out
Power UP so far.

 


/David Palumbo/

/President, Independent Power LLC/

/462 Solar Way Drive, Hyde Park, VT 05655/

NABCEP Certified

/www.independentpowerllc.com <http://www.independentpowerllc.com> /

/(802) 888-7194/

 



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Re: [RE-wrenches] Need NT185U1 Sharp module

[David Katz]

I am pretty sure that AEE has several hundred Mitsubishi UD185MF5

David Katz

Chief Technical Officer

AEE Solar

1155 Redway Drive

P.O. Box 339

Redway, CA  95560

Tel (707) 825-1200

Fax (707) 825-1202

dk...@aeesolar.com <mailto:da...@aeesolar.com>

www.aeesolar.com <http://www.aeesolar.com/>



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Max Balchowsky wrote:

NT185U1. Anyone know where I can find one?


- Original Message 
From: Max Balchowsky 
To: RE-wrenches 
Sent: Wed, February 24, 2010 5:38:14 PM
Subject: Re: [RE-wrenches] Need NT185U1 Sharp module

Need to replace a module damaged by a golf ball strike, NT185U1. Anyone know 
where I can find one, I know sharp has a NT175 U1 mono in the same frame size, 
but I'd like to find a 185 somewhere..

Thanks, 


Max Balchowsky
SEE Systems
1436 Irvine Ave
Newport Beach, Ca.92660
760-403-6810



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Re: [RE-wrenches] Et tu Honeywell?

[David Katz]

The Honeywell turbine appears to be made by a company called 
Windtronics, which is a division of Earthtronics.  Earthtronics appears 
to sell CFL light bulbs.  I have talked to several people at Windtronics 
who cannot answer any technical questions.  True Value Hardware is 
giving out brochures for the wind generator. The brochure claims 2500 KW 
per year in calss 4 winds.  I list them as vapor ware for now.  At least 
until someone calls me back.

David


David Katz

Chief Technical Officer

AEE Solar

1155 Redway Drive

P.O. Box 339

Redway, CA  95560

Tel (707) 825-1200

Fax (707) 825-1202

dk...@aeesolar.com <mailto:da...@aeesolar.com>

www.aeesolar.com <http://www.aeesolar.com/>



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Brian Teitelbaum wrote:


Hi All,

 


Has anyone seen this "Honeywell" turbine?

 


http://www.earthtronics.com/honeywell.aspx

 


Interesting what it says at the bottom of the page:

 

"The Honeywell Trademark is used under license from Honeywell 
International Inc. Honeywell International Inc. makes no 
representation or warranties with respect to this product."


 

 


Brian Teitelbaum

AEE Solar



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Re: [RE-wrenches] sources of DC equipment

[David Katz]

Hi Daryl
Ed Eaton (SEI Instructor) builds and sell a line of LED lights for 12, 
24 and 48 VDC. - haree...@yahoo.com is his email address.


David Katz



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Re: [RE-wrenches] Amphenol Helios as MC4 substitute

[David Katz]

The MC3 tool works great on the Amphenol pins.  The MC4 tool definitely 
will not work


David Katz

Chief Technical Officer

AEE Solar

1155 Redway Drive

P.O. Box 339

Redway, CA  95560

Tel (707) 825-1200

Fax (707) 825-1202

dk...@aeesolar.com <mailto:da...@aeesolar.com>

www.aeesolar.com <http://www.aeesolar.com/>



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Drake Chamberlin wrote:

Rebekah

Will my existing MC 4 crimping tool work with the Amphenol connecter?


At 10:43 AM 4/11/2010, you wrote:

Hi Jay!
I bet it does! What a freakin racket mc had going!
Looking forward to battery lab this summer!

Rebekah Hren
(336)266-8800


On Apr 11, 2010, at 10:37 AM, jay peltz <mailto:j...@asis.com>> wrote:



HI Rebekah,

The most amazing thing is that the tool is only $100 even on this site.
Since the parts are interchangeable, then does this tool work for 
the MC as well?


jay

peltz power
On Apr 11, 2010, at 5:38 AM, Rebekah Hren wrote:


Hi Wrenches,
After the MC4 shortage update a few weeks back I started scouting 
for parts.
Amphenol showed up as a compatible connector that can mate with MC4 
- apparently Suntech d series modules are switching to Amphenol.


Has anyone used/seen these? What do you think the implications 
might be for connecting an MC4 to a non MC4 (supposedly these mate 
perfectly and have been tested to have no higher resistance than 
MC4 to MC4)?


Here's a supplier page: 
http://sg.farnell.com/jsp/level5/module.jsp?moduleId=en/543752.xml


I have a pdf of the announcement from Suntech with more info, can 
email on request.

Thanks,
Rebekah Hren
Durham NC



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Drake Chamberlin
Athens Electric
OH License 44810
CO License 3773
NABCEP TM  Certified PV Installer
Office - 740-448-7328
Mobile - 740-856-9648



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Re: [RE-wrenches] Grid-tie hydro

[David Katz]

Derik at HI Power hydro has done several of these with grid tie DC 
voltage with diversion.

You can reach him at de...@asis.com
http://www.hipowerhydro.com/
cheers,
David

David Katz

Chief Technical Officer

AEE Solar

1155 Redway Drive

P.O. Box 339

Redway, CA  95560

Tel (707) 825-1200

Fax (707) 825-1202

dk...@aeesolar.com <mailto:da...@aeesolar.com>

www.aeesolar.com <http://www.aeesolar.com/>



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Mark Dickson wrote:


Hello Wrenches,

Got one for you. . .

We have a customer that has great potential for a micro-hydro system 
and already has the grid on his property.  The obvious way to tie the 
turbine unit in would be to go back through batteries and a GVFX or 
XW.  In trying to eliminate the batteries and the inefficiencies I 
want to look at using a battery-less grid-tie inverter.  I am assuming 
that I could use a small inverter such as the PVP 1100 and 
high-voltage Stream Engine.  The problem I am trying to work around is 
how to divert the ~240DC output of the turbine, if and when the grid 
goes down.  Would this be as simple a placing a relay on the AC side 
of the inverter and having it switch on/off a large diversion load?


For the diversion load I was thinking I could just series up a set of 
water heater elements to get to the necessary voltage.


 

Has anybody accomplished this before?  Jay?  Are there any other 
elegant solutions for this?


 


Has anybody successfully used a WindyBoy with hydro?

 


Best regards,

 


Mark Dickson,

NABCEP Certified Solar PV Installer ^(TM)

Oasis Montana Inc.

 




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Re: [RE-wrenches] Lorentz Sub Pump

[David Katz]

Allan,
Are you running 100+ volts DC through a Square D breaker?  They are not 
rated for anything above 48VDC.  Midnite Solar makes a manual transfer 
switch that can be fitted with 150 VDC breakers.  That may be a better 
choice.

David


David Katz

Chief Technical Officer

AEE Solar

1155 Redway Drive

P.O. Box 339

Redway, CA  95560

Tel (707) 825-1200

Fax (707) 825-1202

dk...@aeesolar.com <mailto:da...@aeesolar.com>

www.aeesolar.com <http://www.aeesolar.com/>



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Kent Osterberg wrote:

Allan,

Here the electrical inspector won't let us install the CU-200 or other 
SQFlex controls because they are not UL listed.  The pump is not 
listed either, but he doesn't object to that.  So I've installed the 
SQFlex pumps using a pair of SQ D QO breakers with interlock kit so 
they can be run on a generator or solar system.  To turn them off, a 
2-gallon pressure tank with pressure switch (adjusted to operate at 10 
psi) works great if the PV array is near the pumping system. 


Kent Osterberg
Blue Mountain Solar, Inc.



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Re: [RE-wrenches] Lorentz Sub Pump

[David Katz]

Hi Jeff O,
What do you use for power for the relay coil?.  The pump can run on 
voltage up to 300 VDC. I suppose you could tap the output of one module 
or add a separate small module.

David

David Katz

Chief Technical Officer

AEE Solar

1155 Redway Drive

P.O. Box 339

Redway, CA  95560

Tel (707) 825-1200

Fax (707) 825-1202

dk...@aeesolar.com <mailto:da...@aeesolar.com>

www.aeesolar.com <http://www.aeesolar.com/>



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Jeff Oldham wrote:

Hi Roy,

You do have a choice about controllers, as I mentioned I use off-the-shelf 
components. For your need you have at least 2 sweet options - 1) get a relay to 
switch the pump power and use a float switch to control the coil, go with a SSR 
for even higher reliability.  This is a $50 substitute for a $300 CU-200. 2) 
Use a Cla-val at the tank and a pressure switch and 2gal press. tank at the 
pump. This works at any distance w/o control wires and is fully hydraulic and 
highly reliable plus this valve does not throttle as it reaches full. This is 
my control of choice if the distance between pump and tank is much over 400', 
cost must be considered as this is about a $700 setup.

-jeff o

>From the Solar, Wind and Hydro powered office of Jeff Oldham/Regenerative 
SOLutions


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Re: [RE-wrenches] E-meter/Link-10 prescaler

[David Katz]

Hi Todd,
If you get desperate, you can buy them from the company that 
manufactured them for Xantrex.   It is the same company that made the 
Link meters for them and still sells them in Europe.
It is TBS electronics. 
http://www.tbs-electronics.nl/products_expertpro_15voltageprescalerkit.htm

Cheers,
David


David Katz

Chief Technical Officer

AEE Solar

1155 Redway Drive

P.O. Box 339

Redway, CA  95560

Tel (707) 825-1200

Fax (707) 825-1202

dk...@aeesolar.com <mailto:da...@aeesolar.com>

www.aeesolar.com <http://www.aeesolar.com/>



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toddc...@finestplanet.com wrote:
I am looking for any old stock or leads for the now discontinued 
E-meter/Link-10 prescaler. 0-100 volts.


Thanks,

Todd


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Re: [RE-wrenches] low voltage modules in high voltage applications

[David Katz]

I still have some old Xantrex STXR inverters that work on 48 volts and i 
can give him a deal on a Beacon 48 volt grid-tie inverter too.  The 
modules are probably safe at 48 volts.  Give him my number.  i have a 
bridge to sell him, too.

David

David Katz

Chief Technical Officer

AEE Solar

1155 Redway Drive

P.O. Box 339

Redway, CA  95560

Tel (707) 825-1200

Fax (707) 825-1202

dk...@aeesolar.com <mailto:da...@aeesolar.com>

www.aeesolar.com <http://www.aeesolar.com/>



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Richard L Ratico wrote:

Just thinking out loud here.if we all sort of sit back and wait for the
flames, is that where we really want to be? Granted, the party responsible for
this debacle has dug their own hole, but I don't relish the thought of the waste
of a building, the danger involved in fighting a fire, the pollution, etc. that
will likely result. Does this guy deserve a warning? Or has he already had one?

Dick Ratico
Solarwind Electric

--- You wrote:
Is there any way someone could get a picture of this installation for 
the "Hall of flame" gallery ?


I can just see those separate wires going through the roof, but I can't 
print it.


boB

--

My local solar competition and long time friend Ken Schaal (who is also 
on this list) called today to say this guy had also tried to get his 
help. Ken knows where this building is located and will try and get some 
before the fire photos. 


Jeff Yago
DTI Solar

P.S. All the other comments were very funny, especially the walk lights 
and calculators. Nice to see folks have a sense of humor. 
--- end of quote ---

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Re: [RE-wrenches] Enphase performance

[David Katz]

Bill,
Sunpower likes to sell overpriced, private labeled inverters along with 
their modules.  The make installers who want to use their modules, but 
"Sunpower" inverters.

David

David Katz

Chief Technical Officer

AEE Solar

1155 Redway Drive

P.O. Box 339

Redway, CA  95560

Tel (707) 825-1200

Fax (707) 825-1202

dk...@aeesolar.com <mailto:da...@aeesolar.com>

www.aeesolar.com <http://www.aeesolar.com/>



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any manner.






Bill Loesch wrote:

Marv,
 
What would be a (or more) reason(s) that the module manufacturer 
wouldn't want to be on your approved list (and sell more modules)?
 
Thank you,
 
Bill Loesch

Solar 1 - Saint Louis Solar

- Original Message -
*From:* Marv Dargatz <mailto:mdarg...@enphaseenergy.com>
*To:* RE-wrenches <mailto:re-wrenches@lists.re-wrenches.org>
*Sent:* Monday, May 10, 2010 4:59 PM
*Subject:* Re: [RE-wrenches] Enphase performance

Marco,

Sorry, I missed that question in the previous e-mail.

A couple of points about the compatibility list:

1.  We include only modules that have passed our internal math
check for compatibility over the temperature range of the inverter.

2.  If the module manufacturer objects to being on the
compatibility list, we will not include them.

Sunpower has objected, so they are not on the list.

Zhejiang Wanxiang Solar Co. Ltd is also shown as compatible with
the M210.

The list is only a guideline.  Any module that falls within the
voltage spec over the expected operating temperature range of the
installation, and does not exceed the inverter DC input short
circuit current rating is certainly a valid combination, and the
inverter is fully warranted.  Notice that module power rating is
not a factor here.

I hope this helps.


See ya!

Marv
707 763-4784  x7016





Marco Mangelsdorf wrote:


So why is the Enphase 210 just limited "officially" to the Sanyo
line?

Thanks,

marco

Dana, Marco, Wrenches,

In most locations, if the interest is in maximum lifetime energy
production, it does make sense to use modules with STC power
ratings significantly higher than the inverter max power rating.

This is explained in the whitepaper located at:

 
http://www.enphaseenergy.com/downloads/Enphase_White_Paper_Module_Rightsizing.pdf

Remember, under most real world conditions the module will not
produce STC rated power.  The inverter WILL produce maximum rated
power plus some small percent to allow for the CEC max power test
methods.  Also, the module will produce less power every year
(under the same conditions) and the inverter will produce its'
max rated power for its' entire lifetime.

By the way, this all applies to string, central, or
microinverters.  Of course, micros still retain the advantages of
dealing with mismatch, partial shading/soiling, etc.

Bottom line is, the "perfect" match will depend on your
particular installation.


See ya!
 
Marv

707 763-4784  x7016



Dana Brandt wrote:

Something to remember is that my simulation was for a specific
location in Washington. The answer might be different for your
location and weather patterns.

I agree that it seems wrong to have the inverter rating 20% less
than the array nameplate. Typically, I would consider that sort
of pairing a poor design. You're right that there will certainly
be some clipping - especially with cloud-edge effects. The real
question in my mind is not whether the inverter will ever clip
the output of the array, but what's the real impact of that on
energy generation on an annual basis. This is what lead me to do
the modeling simulations which indicated the effect is negligible
when taken in the context of the total annual production.
Compared to the whole year's sun, there just isn't that much
energy in high production spikes like cloud edge effects that the
inverters will clip - at least not around here.

One thing to consider is that if you go with smaller modules you
need more inverters. You might compare the cost of the additional
inverters to the value of the 0.2% energy loss from clipping over
  

Re: [RE-wrenches] current carrying conductor

[David Katz]

Marco,
When you are drawing 120 VAC, the neutral is a current carrying conductor.
David

David Katz

Chief Technical Officer

AEE Solar

1155 Redway Drive

P.O. Box 339

Redway, CA  95560

Tel (707) 825-1200

Fax (707) 825-1202

dk...@aeesolar.com <mailto:da...@aeesolar.com>

www.aeesolar.com <http://www.aeesolar.com/>



DISCLAIMER:
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communication and its attachments without reading, printing or saving in 
any manner.






Marco Mangelsdorf wrote:


I have a disbelieving business partner who believes that the neutral 
conductor in a standard 120/240VAC service is a current carrying 
conductor.


 


Could someone please disabuse him of that notion?

 


Thanks,

marco

 




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Re: [RE-wrenches] AM noise on batteryless inverters

[David Katz]

I have an SMA 2500U in my bedroom outside wall and Tigo Maximizers on 
the modules and have noise on AM radio in the bedroom in the daytime.


David Katz

Chief Technical Officer

AEE Solar

1155 Redway Drive

P.O. Box 339

Redway, CA  95560

Tel (707) 825-1200

Fax (707) 825-1202

dk...@aeesolar.com <mailto:da...@aeesolar.com>

www.aeesolar.com <http://www.aeesolar.com/>

DISCLAIMER:
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On 6/19/2010 12:47 PM, frenergy wrote:

Along these "AC noise" lines...

   About 6-7 years ago I installed 2, SMA 2500U inverters at a 
friend's (most dangerous situation, installing for a friend...like 
selling a friend your used car!) place.  This guy is a Ham radio 
operator AND the inverters are on the wall opposite all of his gear 
(what was I thinking?) Fortunately, he's still my friend...no noise 
can be detected on his ham radios.


Bill

Feather River Solar Electric
4291 Nelson St.
Taylorsville, CA  95983
530-284-7849/6544 fax


- Original Message - From: "jay peltz" 
To: "RE-wrenches" 
Sent: Friday, June 18, 2010 12:00 PM
Subject: Re: [RE-wrenches] AM noise on batteryless inverters



Hi Darryl,

Personally I've tried this and had no luck with offgrid

But the issue is that a very competent installer friend, whos not on 
the wrenches has had issues with PV powered and AM radio noise, but 
not with

SMA or Fronius.
He's actually swapped inverters same location from PV to SMA and the 
AM noise was gone and has had this problem enough times to no longer 
use them for folks who like to listen to AM during the day.


So I'm trying to find if anyone else has had anything similar?

Thanks,

jay

peltz power


On Jun 17, 2010, at 9:30 PM, Darryl Thayer wrote:

I have heard that putting small ferrite donuts around the AC and DC 
wires will reduce this noise.  Place them inside the inverter.  they 
are avaiable from DigiKey

Darryl


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Re: [RE-wrenches] AM noise on batteryless inverters

[David Katz]

Whoops - I meant to say *_no_* noise in the thread below. AM radio works 
perfectly.


David

AEE Solar

David Katz

Chief Technical Officer

AEE Solar

1155 Redway Drive

P.O. Box 339

Redway, CA  95560

Tel (707) 825-1200

Fax (707) 825-1202

dk...@aeesolar.com <mailto:da...@aeesolar.com>

www.aeesolar.com <http://www.aeesolar.com/>

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On 6/19/2010 5:57 PM, David Katz wrote:
I have an SMA 2500U in my bedroom outside wall and Tigo Maximizers on 
the modules and have noise on AM radio in the bedroom in the daytime.


David Katz

Chief Technical Officer

AEE Solar

1155 Redway Drive

P.O. Box 339

Redway, CA  95560

Tel (707) 825-1200

Fax (707) 825-1202

dk...@aeesolar.com <mailto:da...@aeesolar.com>

www.aeesolar.com <http://www.aeesolar.com/>

DISCLAIMER:
This communication, along with any documents, files or attachments, is 
intended for the use of only the addressee and contains privileged and 
confidential information. If you are not the intended recipient, you 
are hereby notified that any dissemination, distribution or copying of 
any information contained in or attached to this communication is 
strictly prohibited.  If you have received this message in error, 
please notify the sender immediately by e-mail reply and destroy the 
original communication and its attachments without reading, printing 
or saving in any manner.



On 6/19/2010 12:47 PM, frenergy wrote:

Along these "AC noise" lines...

   About 6-7 years ago I installed 2, SMA 2500U inverters at a 
friend's (most dangerous situation, installing for a friend...like 
selling a friend your used car!) place.  This guy is a Ham radio 
operator AND the inverters are on the wall opposite all of his gear 
(what was I thinking?) Fortunately, he's still my friend...no noise 
can be detected on his ham radios.


Bill

Feather River Solar Electric
4291 Nelson St.
Taylorsville, CA  95983
530-284-7849/6544 fax


- Original Message - From: "jay peltz" 
To: "RE-wrenches" 
Sent: Friday, June 18, 2010 12:00 PM
Subject: Re: [RE-wrenches] AM noise on batteryless inverters



Hi Darryl,

Personally I've tried this and had no luck with offgrid

But the issue is that a very competent installer friend, whos not on 
the wrenches has had issues with PV powered and AM radio noise, but 
not with

SMA or Fronius.
He's actually swapped inverters same location from PV to SMA and the 
AM noise was gone and has had this problem enough times to no longer 
use them for folks who like to listen to AM during the day.


So I'm trying to find if anyone else has had anything similar?

Thanks,

jay

peltz power


On Jun 17, 2010, at 9:30 PM, Darryl Thayer wrote:

I have heard that putting small ferrite donuts around the AC and DC 
wires will reduce this noise.  Place them inside the inverter.  
they are avaiable from DigiKey

Darryl


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Re: [RE-wrenches] Interstate UL-16 HC problem

[David Katz]

Title: David Katz




Wrenches
The only time I ever see L16s last this long is when they are
over-sized so much that they can lose half of their capacity and still
satisfy the customer.  Batteries are considered worn out when they only
hold 80% of their original capacity.  If the customer really only needs
40-50% of the original capacity sold to them, them might get 10 years
with really good care.  
David











David Katz
Chief Technical Officer
AEE Solar
1155 Redway Drive
P.O. Box 339
Redway,
CA  95560
Tel (707) 825-1200
Fax (707) 825-1202
dk...@aeesolar.com
www.aeesolar.com
 
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intended
for the use of only the addressee and contains privileged and
confidential
information. If you are not the intended recipient, you are hereby
notified that any dissemination, distribution or copying of any
information
contained in or attached to this communication is strictly prohibited. 
If
you have received this message in error, please notify the sender
immediately
by e-mail reply and destroy the original communication and its
attachments
without reading, printing or saving in any manner.
 



On 7/1/2010 3:47 AM, Dave Palumbo wrote:

  
  

  
  
  Tom,
   
  I have
seen many Surrette
battery banks of two series strings in parallel  last 10 to 12 years.
Also have
had a few with three string banks go that long. All were well designed
systems
with homeowners providing good maintenance.
   
  Dave
   
  
  
  From:
re-wrenches-boun...@lists.re-wrenches.org
[mailto:re-wrenches-boun...@lists.re-wrenches.org] On Behalf Of The
Office
of Tom Duffy
  Sent: Wednesday, June 30, 2010 10:56 PM
  To: 'RE-wrenches'
  Subject: Re: [RE-wrenches] Interstate UL-16 HC problem
  
  
   
  Jay
   
  Higher
charge settings, proper absorb times (do the math) and
absorb voltage settings, diligent maintenance and twice yearly good
EQs, on a
single series connected, properly sized string, of quality L16s, will
yield at
least 10 to 12 years. Maybe not on a Deka, Exide or even Interstate
which have
thinner plates than Trojan or Surrette. I have seen some 14 year
strings in
use, though they were pretty well exhausted.
   
  Now
I’m only talking about single series banks. There is no hope
for parallel banks without a lot of extra time and work and even then
not the
life were talking about here.
   
  Remember
that 8  400 AH L16s in a 48 volt string is a rather
small-small cabin, for three days autonomy, so proper sizing is a must
for good
life. It’s really about cycles because the positive plate is finite and
at the
hoped for end to its life there is really no positive plate left. Most
of the
batteries out there however will die from sulfation suffocation long
before
this end.
   
  
    Tom
Duffy
   
Systems Design Engineer
  
   t...@thesolar.biz
    
575-539-2111 X 301
  Although
no trees were killed in the sending of this message, a
large number of electrons were terribly inconvenienced.
   
  Confidentiality
Notice:
This
message including any attachments is for the sole use of the intended
recipient(s) and may contain confidential and privileged information.
Any
unauthorized review, use, disclosure or distribution is prohibited. If
you are
not the intended recipient, please contact the sender and delete any
copies of
this message.
  
  
  
  
  From:
re-wrenches-boun...@lists.re-wrenches.org
[mailto:re-wrenches-boun...@lists.re-wrenches.org] On Behalf Of jay
peltz
  Sent: Wednesday, June 30, 2010 7:20 PM
  To: RE-wrenches
  Subject: Re: [RE-wrenches] Interstate UL-16 HC problem
  
   
  HI Tom,
  
   
  
  
  Are you saying that you are seeing 14 years on a
single
string of L-16's?
  
  
  If so I would like to hear your charging
 recommendations.
  
  
   
  
  
  thanks,
  
  
   
  
  
  jay
  
  
   
  
  
  peltz power
  
  
  
  
  On Jun 30, 2010, at 9:32 AM, The Office of Tom
Duffy wrote:
  
   
  
  Bob
   
  Yes
the problem is hard sulfation due to chronically under
charging. The absorb time and voltage is the most critical charge mode
for
charging batteries. The default settings on inverters and charge
controllers
are always way too short, so they hold the batteries in absorb for a
little
while, then go to float, leaving the batteries under charged forever,
thus we
get hard sulfation. This is what you have here. Typically two parallel
strings
will yield about 6 ½ years of life in a system that is used off grid.
While a
single series string will yield 10 to 14 years (properly maintained) 14
years
is not the rule however. 
   
  A
bit of due diligence is now required to get these back, (and
they may not be worth it). Separate the two strings and give them 62
volts for
10 hours; you’ll have to watch them so they don’t get too hot. Set the
absorb
settings below and give them about three weeks. If there is some
improvement in
capacity, another EQ; 61 volts for two hours may just do it. 
   
  With
the Magnum 48 volt inverter 

Re: [RE-wrenches] 2500 W inverter for $300

[David Katz]

Often the CCC inverters have a very high standby power draw, and some shut off 
at 15 volts so you cannot equalize.  The don't have chargers and transfer 
switches.  They are not UL listed.  Some don't allow proper grounding, with 
negative battery and neutral bonded. They don't offer much motor starting surge.
David Katz

Sent from my iPhone

On Aug 9, 2013, at 8:08 AM, "RE Ellison" 
mailto:reelli...@gmail.com>> wrote:

Do they have a charger or just a CCC inverter?
Harbor freight sells units like this.
Unless they are a continuing customer or a friend, I would be inclined to tell 
them good luck.
PLEASE call someone else, asap!


We know how this story will end,

Bob

From: 
re-wrenches-boun...@lists.re-wrenches.org<mailto:re-wrenches-boun...@lists.re-wrenches.org>
 [mailto:re-wrenches-boun...@lists.re-wrenches.org] On Behalf Of Drake
Sent: Friday, August 09, 2013 9:24 AM
To: RE-wrenches
Subject: [RE-wrenches] 2500 W inverter for $300

A couple of customers have found 2500 W inverters rated as true sine wave for 
prices in the $300 range. My strong gut feeling is that they are junk, but I 
have no experience with these. They feel the inverters from Outback, Magnum etc 
are far overpriced.

What would you say to a customer who wanted to purchase one of the units?

Thanks,

Drake


Drake Chamberlin
Athens Electric LLC
OH License 44810
CO License 3773
NABCEP Certified PV
740-448-7328
http://athens-electric.com/
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Re: [RE-wrenches] XW 600 VDC Controller?

[David Katz]

Greg
I have been using one for over a year with 4.5kw of modules.  It works great.
David Katz

Sent from my iPhone

On Sep 22, 2013, at 5:03 PM, "Greg Egan" 
mailto:g...@remotepowerinc.com>> wrote:

Friends,

Have a customer that needs to put the array 420' from the batteries.  Have 
never really wanted to wire an off grid customer for hi voltage DC but the 
price difference on that much copper has me considering it.  Anyone used the 
XW-MPPT 80-600 and been happy with it?  I did a search of the archive and only 
found 1 post with my keywords in it.

Thanks again,

Greg Egan
NABCEP Certified PV Installer, Licensed Journeyman Electrician
Remote Power Inc.
g...@remotepowerinc.com<mailto:g...@remotepowerinc.com>
--

<http://www.remotepowerinc.com>

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Re: [RE-wrenches] Energy usage for an electric car

[David Katz]

My nissan leaf uses about 25 kW-h to go 70 miles.
David Katz

Sent from my iPhone

On Sep 27, 2013, at 1:20 PM, "William Miller" 
mailto:will...@millersolar.com>> wrote:

Friends:

Have any of you researched the energy usage for an electric car?  The car in 
question is a Tesla Sedan.

Thanks in advance.

William

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Re: [RE-wrenches] Fwd: Re: DC arc welder?

[David Katz]

You can buy a 24 volt DC MIG welder from ReadyWelder.
David Katz

Sent from my iPhone

On Nov 23, 2013, at 10:37 AM, "Allan Sindelar" 
mailto:al...@positiveenergysolar.com>> wrote:

Forwarding from Windy.

 Original Message 

Sure you can solar weld! Afterall, some of us have welded from battery power 
when we preferred NOT to.

   :0) <<  that's the HONK of a Solar Bozo (Emeritus)

But seriously, Back in the 1930's to 50's when thousands of farms and ranches 
had wind power, 32V was the standard voltage for the 2-3kW systems. Among the 
many tools and appliances available, it was common to have a 32V welder. I used 
one of them back in the 70's. I was nothing but a box with a coil in it. The 
coil wasn't for inductance, just for resistance. It was steel wire maybe 1/8" 
thick with taps to give a choice of current. For max. current, the coil would 
be completely out of circuit.

The guys I shared the shop with abandoned their buzz box 'cuz the DC was so 
smooth.

Towers are still standing on welds I did in the late 70's using 6011 and 7013 
rod (if I remember right).

I had a cell failure early on, and my system was 30, not 32V. Worked fine for 
years.

I'm quite sure 24V would work, at least for smallest rods. It certainly works 
for MIG welding. Century made a 24V "Portable MIG" to use on 24V diesel 
vehicles and farm machines for field repairs. They were made in 70's and 80's. 
Nice, 'cuz they are light-weight / no transformer. I used one on my PV system 
until I moved recently. I had 3-4V of line loss and it still worked fine with 
.030 wire. Again, it has steel coils with taps for control.

If you want MIG, search for a Century Portable MIG. Otherwise, get the smallest 
sticks and try 24V. I think I tried it, or heard that it's not quite enough V. 
36V is MORE than you need. If you do 36, use undersized cable because you'll 
need resistance anyway!

Searching … 24V MIG is in remote storage with hen's teeth and unobtainium.
but discussion at
http://forum.ih8mud.com/tools-fabrication/416445-snap-24v-portable-mig.html
confirmed that you can do stick with 24V.
AND somebody suggested this:
http://store.cyberweld.com/twsgspgun10.html

The spool gun looks like the modern way to solve the problem for professional 
use. Reviews there say it doesn't have speed control on the gun. So you need a 
resistance coil with taps, and you need a speed control.

I hope this helps!
Windy

Windy Dankoff Solar Bozo Emeritus

 Specialist in solar-electric applications & solar water pumping
  Education   <>   Industry support<>Since 1975
   -
  Founder, retired, Dankoff Solar Products, Inc.
  spin-offs:  Dankoff Solar Pumps  •  Positive Energy  •  Conergy USA
 Co-author, work in progress: The Handbook of Solar Water Pumping

12-minute TV interview:
http://www.youtube.com/watch?v=yt3hKgriSbo&list=TLrXFKMLwzCwuUD5h52WCzKdWRR-Juk3XA
   -
   windydank...@mac.com<mailto:windydank...@mac.com>
   Santa Fe, NM
   home (505) 466-4280
   cell (505) 490-0313



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Re: [RE-wrenches] Shedding ice

[David Katz]

Mark,
I believe the Midnite Classic has this feature built in. Check with them.
David Katz

From: Mark Dickson [mailto:m...@oasismontana.com]
Sent: Monday, January 16, 2012 10:00 AM
To: 'RE-wrenches' 
Subject: [RE-wrenches] Shedding ice

I recall a conversation a while back about the possibility of “reversing” the 
current in a solar module to increase the cell temp enough to shed ice/rime.  
To follow-up, has anybody been successful at this?  I am guessing, if so, it 
would entail, removal of diodes, increasing PV and battery capacity and some 
way to sense the ice at the very least. . . It sounds good in theory, but I am 
skeptical as to whether it will work in reality. . .

Best regards,

Mark Dickson,
NABCEP Certified Solar PV Installer ™
Oasis Montana Inc.


From: re-wrenches-boun...@lists.re-wrenches.org 
[mailto:re-wrenches-boun...@lists.re-wrenches.org] On Behalf Of Allan Sindelar
Sent: Monday, January 16, 2012 10:52 AM
To: re-wrenches@lists.re-wrenches.org
Subject: Re: [RE-wrenches] Request for Gennie Recommendation

Wrenches,
I very much appreciate this ongoing thread, thank you.

This actually feels like one of those "damned if you do, damned if you don't" 
scenarios. The system is six years old, poorly designed and installed. Two 
SW5548s, most likely chosen in order to run a 2HP conventional well pump for 
this manufactured home. Thirty-two L16s in four strings, in two unvented 
battery boxes in an unheated shed at 7800'. 1.66kW of PV plus an H40? wind 
generator, in an area not known for great wind resource. The inverters either 
were never programmed correctly or lost programming the first time a battery 
was replaced, so the batteries never got above default 57.6V and were never 
equalized. When the L16s started failing, the installer instructed the owners 
to replace individual batteries, over and over until 17 of the 32 had been 
replaced, one or two or four at a time. With a continuing stream of failing 
cells, each time the well pump came on the voltage dropped to "must start" and 
the generator came on. With default programming, the inverters would charge to 
57.6V (if the batteries would get up there - not sure if they ever did), then 
go through the two-hour absorption, then shut off and soon the cycle would 
repeat.

The installer put a Link-10 in the home, but without a prescaler, so it 
couldn't work on a 48V system. So he tapped off of part of one string. All 
monitor programming was at default settings, so the system monitor had been 
useless to the homeowners since installation. This was designed and installed 
by someone in business doing wind and PV since the 1980s. His website claims he 
is "the most experienced contracting company in the Southwest specializing in 
electric/electronic installation, service and repair of independent, remote or 
utility integrated power generation power supplies. We provide electrical 
engineering design, specializing in on-site electrical power generation and 
related control systems." This is some mighty poor work.

Our immediate "rescue solution" was to string together 16 of the replacement 
batteries, program the inverters to corrective EQ, show the homeowner how to 
change inverter settings, and replace the Link-10 with a TriMetric with 
prescaler, guessing at 500 amp-hours. At first this appeared to have failed - 
the battery voltage rose quickly under charge and then fell just as quickly. 
But we later learned that this actually worked, as they told us that after 
running a long corrective EQ, the batteries came back and the generator ran far 
less. But then the existing generator failed to start; apparently just worn 
out, and they're in bad shape.

We plan to add about 2-2.5kW of array, although we have no load profile from 
them yet. The existing array is on two poles. The (original) smaller array of 8 
Sharp 80W 12V modules is shaded during winter by the larger array of 6 Sharp 
170W modules during the mornings. The larger array is shaded by both a juniper 
tree on winter mornings (until after 11 am) and by the power equipment shed on 
winter afternoons (after 3 pm). The ground is frozen now, so we have no easy 
way to either increase the array of move the existing arrays out of where they 
shade each other.

They have two SW5548s, so need around 15kW at 7800' to run the inverters at 
full capacity. The unknown is that we don't yet know what size the new battery 
bank will be; my SWAG is about 1,000 a-hr in a single string of industrial 
cells. Together the SWs can charge at 120A, so 1,000 A-hrs would be a good 
match. You are correct that the generator run time will be greatly reduced once 
the array is increased, the batteries replaced, and their loads reduced through 
customer education. But they need a gennie right away, as their PV and wind 
can't keep up and the system is shutting down. I'm hesitant to r

Re: [RE-wrenches] low head/low cost solar pump

[David Katz]

Mac,
The cheapest pump to do this job is the LVM Amazon, which is made in England, 
will pump 3 or 4 GPM at 10 feet of head and costs around $70.  They are made to 
run on a 12 volt battery and cannot handle more than 14 volts, so a small 
battery and controller are required.  You can use a low cost regulator and a 
relay powered by the module to only run the pump when the sun is shining.

If you use a Surflo 2088, use the 24 volt version with a nominal 12 volt 36 
cell module array direct.  This way the pump never sees too high of a voltage.  
It will operate at 17 to 18 volts, pump slightly less then spec says at 24 
volt, but since it is positive displacement it will pump fine at the low 
voltage.

David Katz
CTO & Founder
AEE Solar Inc
P: 707 825-1200
F: 707 825-1202
dk...@aeesolar.com
www.aeesolar.com
DISCLAIMER:
This communication, along with any documents, files or attachments, is intended 
for the use of only the addressee and contains privileged and confidential 
information. If you are not the intended recipient, you are hereby notified 
that any dissemination, distribution or copying of any information contained in 
or attached to this communication is strictly prohibited.  If you have received 
this message in error, please notify the sender immediately by e-mail reply and 
destroy the original communication and its attachments without reading, 
printing or saving in any manner.


From: re-wrenches-boun...@lists.re-wrenches.org 
[mailto:re-wrenches-boun...@lists.re-wrenches.org] On Behalf Of mac Lewis
Sent: Friday, February 24, 2012 7:50 AM
To: RE-wrenches
Subject: [RE-wrenches] low head/low cost solar pump

Hi wrenches,

I am looking for a relatively low cost solar pumping system.  The system has 
about 10 ft of elevation head and he just wants to water his garden which is 
about 200' away horizontally.  It can either be a submersible pump or a pump 
that can produce some suction.  Any experience with this?  Everything I've 
looked at thus far has been overkill and/or fairly expensive.

Thanks

--



Mac Lewis

"Yo solo sé que no sé nada." -Sócrates

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Re: [RE-wrenches] DC to DC power supplies

[David Katz]

Hi Jay,
Powerstream has complete units with leads so you don't need to get an enclosure 
or solder anything.  http://www.powerstream.com/dcdc.htm
They have a 24 vdc to 9 vdc for $31.
Kirt Jensen has taken good care of me there.
David

David Katz
CTO & Founder
AEE Solar Inc
P: 707 825-1200
F: 707 825-1202
dk...@aeesolar.com
www.aeesolar.com
DISCLAIMER: 
This communication, along with any documents, files or attachments, is intended 
for the use of only the addressee and contains privileged and confidential 
information. If you are not the intended recipient, you are hereby notified 
that any dissemination, distribution or copying of any information contained in 
or attached to this communication is strictly prohibited.  If you have received 
this message in error, please notify the sender immediately by e-mail reply and 
destroy the original communication and its attachments without reading, 
printing or saving in any manner.
 

-Original Message-
From: re-wrenches-boun...@lists.re-wrenches.org 
[mailto:re-wrenches-boun...@lists.re-wrenches.org] On Behalf Of jay peltz
Sent: Monday, February 27, 2012 4:41 PM
To: RE-wrenches
Subject: [RE-wrenches] DC to DC power supplies

HI All,

I'm in need of a 24vdc to 9vdc converter,
1-2 amps max.

Solar converters is 4-6 weeks out.

Any ideas?

thanks,

jay

peltz power
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Re: [RE-wrenches] PV harvest in grid-tied systems

[David Katz]

William
I have a grid tie system with a Outback Radian and Xantrex 600 volt charge 
controller with 4kw of modules and it sells back flawlessly.  I have 
revenue-grade monitoring on the system and I am very happy with the output.
David Katz

Sent from my iPhone

On Apr 16, 2012, at 6:51 AM, "William Miller"  wrote:

> Friends:
> 
> There has been recent discussion on this forum about PV production in 
> grid-tied with battery systems.  I have been faced with this same problem 
> in a 3 XW system installed in 2009.
> 
> The customer's power bill never went down.  PV harvest was abysmal.  The 
> system would create great short circuit current but would not harvest into 
> the batteries.
> 
> It is starting to appear the XW firmware was at fault.  The inverters would 
> charge the batteries too high so the charge controllers would back 
> off.  Upgraded firmware seems to be helping, but the data set is still 
> limited.
> 
> Remember this:  just because a PV system can produce does not mean it 
> will.  The charge controller knows only one thing:  battery voltage.  If it 
> is high, production is curtailed.
> 
> Off-grid production will also be reduced is consumption is curtailed.
> 
> Charge controllers that can be set for grid-tied applications help, but 
> only if the inverter(s) do not keep the battery voltage too high.
> 
> William Miller
> 
> 
> Miller Solar
> Voice :805-438-5600
> email: will...@millersolar.com
> http://millersolar.com
> License No. C-10-773985
> 
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Re: [RE-wrenches] PV harvest in grid-tied systems

[David Katz]

William 
I am using an Elkor meter with RS485 output connected to a SolarLog1000. There 
are two current transformers connected to the Elkor meter. I ran each wire from 
the 240 vac from the main load center through a current transformer to the 
Radian ac input. Then I ran the Ac output line from the radian back through the 
same current transformers to the subpanel for backed up loads. That way the ac 
passing through the radian from the grid to the subpanel reads 0 since it 
passes both way through the CTs, but power coming from the Radian is measured 
going to the grid and to the loads in the subpanel.
I am traveling in Europe at the moment and I done have a computer so I do not 
have the link to the monitoring. I will try to get it so you can take a look.
David

Sent from my iPhone

On Apr 18, 2012, at 2:30 PM, "Bill Loesch"  wrote:

> 
> David,
> 
> What did you choose for revenue-grade monitoring?
> 
> Comments?
> 
> Bill Loesch
> Solar 1 - Saint Louis Solar
> 314 631 1094
> 
> 
> On 18-Apr-12 4:01 AM, David Katz wrote:
>> William
>> I have a grid tie system with a Outback Radian and Xantrex 600 volt charge 
>> controller with 4kw of modules and it sells back flawlessly.  I have 
>> revenue-grade monitoring on the system and I am very happy with the output.
>> David Katz
>> 
>> Sent from my iPhone
>> 
>> On Apr 16, 2012, at 6:51 AM, "William Miller"  
>> wrote:
>> 
>>> Friends:
>>> 
>>> There has been recent discussion on this forum about PV production in
>>> grid-tied with battery systems.  I have been faced with this same problem
>>> in a 3 XW system installed in 2009.
>>> 
>>> The customer's power bill never went down.  PV harvest was abysmal.  The
>>> system would create great short circuit current but would not harvest into
>>> the batteries.
>>> 
>>> It is starting to appear the XW firmware was at fault.  The inverters would
>>> charge the batteries too high so the charge controllers would back
>>> off.  Upgraded firmware seems to be helping, but the data set is still 
>>> limited.
>>> 
>>> Remember this:  just because a PV system can produce does not mean it
>>> will.  The charge controller knows only one thing:  battery voltage.  If it
>>> is high, production is curtailed.
>>> 
>>> Off-grid production will also be reduced is consumption is curtailed.
>>> 
>>> Charge controllers that can be set for grid-tied applications help, but
>>> only if the inverter(s) do not keep the battery voltage too high.
>>> 
>>> William Miller
>>> 
>>> 
>>> Miller Solar
>>> Voice :805-438-5600
>>> email: will...@millersolar.com
>>> http://millersolar.com
>>> License No. C-10-773985
>>> 
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Re: [RE-wrenches] Xantrex 600v charge controller

[David Katz]

Lars
I have been using the Xantrex 600 volt charge controller for 6 months.  It 
works great.  It is controlling 4kW coming in at 350 vdc charging a 48 volt 
battery.  You need to have the remote to set it up and monitor its output.
David Katz

Sent from my HTC smartphone on the Now Network from Sprint!


- Reply message -
From: "lars Ortegren" 
To: "re-wrenches@lists.re-wrenches.org" 
Subject: [RE-wrenches] Xantrex 600v charge controller
Date: Wed, May 16, 2012 12:07 pm



Wrenches,
I’m wondering if here is anybody out there that has installed 
any Xantrex 600v charge controllers out there. I looking at a job and thinking 
about replacing an MX-60 with a 700 foot pipe run to the array wired with #6 
thhn My understanding is that the further away you get from the battery 
voltage, the greater the efficiency loss is within the unit. Outback gives the 
curve to show the loss of output at higher voltages, but searching Schneider’s 
site I can’t find anything close. It’s either going to be this, or tying a 
grid-tied inverter through the Outback output, but doing that would only get me 
single stage charging. Has anyone watched these controllers over time? 
Monitored its output?
Thanks

Lars Ortegren
Director of Operations
California Solar Electric Company
10141 Evening Star Drive, Suite 6
Grass Valley, CA 95945
http://www.californiasolarco.com/

Phone : (530)274-3671
Fax: (530)274-7518

California C-10 Electical Contractor #779624
NABCEP Certified PV Installer # 091110-89
Certified NABCEP Continuing Education Provider


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Re: [RE-wrenches] Troubleshooting Off-grid PV

[David Katz]

I would check each string.  I have seen many failed 120 watt Kyocera modules. 
They had a delamination problem.
David Katz

Sent from my HTC smartphone on the Now Network from Sprint!


- Reply message -
From: "Eric Stikes" 
To: "RE-wrenches" 
Subject: [RE-wrenches] Troubleshooting Off-grid PV
Date: Sun, May 27, 2012 2:51 pm



Hi Wrenches,

I inherited an off-grid PV system that seems to be significantly under 
producing. I have:

12 KC120's (~17V 7A each) paired up 2 in series, for 6 strings terminated on 
new 15A breakers in a new Midnite combiner,
Output of combiner passes through a 60A breaker then into a SolarBoost 50 
charge controller. An SW4024 ties in the CC, a Kohler 8.5 Gen set, and a Yuasa 
24V battery bank.

My problem is that I never see more than about 5A (displayed at charge 
controller) coming off the array, even in full sun, regardless of the state of 
charge of the batteries. I figure I should see, at least once in a while, 
closer to between 20-30A. Batteries are, admittedly, passed their life 
expectancy as the system was installed in '02 and I am sure this is part of the 
problem. I'm thinking that if the batteries are at about 1/2 capacity (don't 
own a hydrometer...yet), the controller senses the batteries are near full SOC 
even at lower voltage (~24V) and is therefore attempting to trickle charge even 
in the bulk stage. Though this is not how the CC is supposed to function in 
bulk, obviously, I'm assuming the old batteries are altering the standard 
operating conditions of the system. I've adjusted the Bulk set point on the CC 
but that doesn't seem to make a difference.

I doubt this is part of the problem but the generator is problematic as well 
(it has it's own array of maladies).

Any insight is greatly appreciated. Thanks!

--
Eric Stikes
Owner
SunHarvest Solar
+1 (530) 798 - 3738
www.harvesthesun.com<http://www.harvesthesun.com/>
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Re: [RE-wrenches] Trace SW4024, 1998 vintage - Still OK for grid-tie?

[David Katz]

The SW requires and inductor to operate in current mode for grid tie.  Maybe 
someone remembers the part number. It may be hard to find.
David Katz

Sent from my HTC smartphone on the Now Network from Sprint!


- Reply message -
From: "Bob Clark" 
To: "re-wrenches@lists.re-wrenches.org" 
Subject: [RE-wrenches] Trace SW4024, 1998 vintage - Still OK for grid-tie?
Date: Sat, Jun 30, 2012 5:10 pm



RE-Wrenches:

Have a potential customer who wants to connect to the grid after many years of 
off-grid living.  He is asking if his older Trace inverter (SW4024 inverter; 
Date of manufacture:  3rd quarter of 1998; S/N:  W07878; 120 volts and 33.3 
Amps) would still be OK to use in a grid-tie system.

What say you?  Does it still comply with the latest standards for grid-tie 
inverters?  Should he start over with a new inverter?

Bob Clark
SolarWind Energy Systems, LLC
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Re: [RE-wrenches] Outdoor woodstove/furnace and solar

[David Katz]

I have a Central Boiler brand of outdoor wood furnace.  It has an electric 
damper that has to be powered whenever the fire is burning, which draws about 
50 watts and a small circulator pump that draws a bit less than 100 watts.
I stopped using it years ago because it consumed so much wood, but it worked 
great.  It was a great way to get rid of pallets.
Unfortunately it was most needed whenever there was not much sun, so it 
definitely increased generator run time.
David Katz

Sent from my HTC smartphone on the Now Network from Sprint!


- Reply message -
From: "Ron @ earthRight Solar" 
To: "RE-wrenches" 
Subject: [RE-wrenches] Outdoor woodstove/furnace and solar
Date: Wed, Jul 4, 2012 4:48 pm



Hi Wrenches,

Have a client who wants to install an outdoor wood furnace for hydronic heating 
in his shop and home. Wondering if any have had experience with these. It seems 
like an intensive off-grid load because of fans and/or pumps. Any experience or 
model recommendations is appreciated, thanks!

Ron Young
earthRight - Solareagle
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