Greetings Esteemed Wrenches:
I've just heard back from our inspector here in Colorado, and we are
still being required to disconnect the batteries under 690.12. No where
in 690.12 are batteries mentioned, nor in the appropriate 690.71 section
that deals with batteries. The entire reasoning b
ge systems (Article 706) will have their
own requirements in time--that is guaranteed.
Bill.
-Original Message-
From: RE-wrenches [mailto:re-wrenches-boun...@lists.re-wrenches.org] On
Behalf Of Ray Walters
Sent: Tuesday, March 15, 2016 9:02 AM
To: RE-wrenches
Subject: [RE-wrenches] Rapid
ists.re-wrenches.org
<mailto:re-wrenches-boun...@lists.re-wrenches.org>] On
Behalf Of Ray Walters
Sent: Tuesday, March 15, 2016 9:02 AM
To: RE-wrenches mailto:re-wrenches@lists.re-wrenches.org>>
Subject: [RE-wrenches] Rapid Shutdown
Greetings Esteemed Wrenches:
nal Message-
From: RE-wrenches
[mailto:re-wrenches-boun...@lists.re-wrenches.org
<mailto:re-wrenches-boun...@lists.re-wrenches.org>] On
Behalf Of Ray Walters
Sent: Tuesday, March 15, 2016 9:02 AM
To: RE-wrenches mailto:re-wrenches@lists.re-wrenches.org>>
Subje
trip breaker as part of their ebox that works with the birdhouse
I've used one in the past
Is it not ul listed
That's all from me
Pat
Patrick A. Shortell
Licensed Master Electrician
Certified Solar Installer
71 Oregon Street
Long Beach N.Y. 11561
Www.thesolarstorehouse.com <http://ww
-that is guaranteed.
Bill.
-Original Message-
From: RE-wrenches
[mailto:re-wrenches-boun...@lists.re-wrenches.org
<mailto:re-wrenches-boun...@lists.re-wrenches.org>] On
Behalf Of Ray Walters
Sent: Tuesday, March 15, 2016 9:02 AM
T
cian
Solar Design Engineer
303 505-8760
On 3/15/2016 8:04 PM, b...@midnitesolar.com wrote:
On 3/15/2016 5:23 PM, Ray Walters wrote:
Hi Brad;
I think that remotely tripping the inverter might work with Outback,
but definitely not with Magnum. (I checked with them today) Also, if
the battery cable
What about building a 30 vdc system (5 x 6v batteries in series) and
adjust the settings on a Midnite Classic to work with that? How tight
does the 30 vdc output need to be?
On inverters, I've had trouble with the Suresine, basically not working
with GFCI outlets.
I keep trying different mod
Also worth looking at Magnum's new AC diversion load system. It does
the frequency shifting but also 4 kw dump load that can be set up to any
AC electric load.
R.Ray Walters
CTO, Solarray, Inc
Nabcep Certified PV Installer,
Licensed Master Electrician
Solar Design Engineer
303 505-8760
On 4/4
Hi Wayne;
Which GFCI outlets do you use? We've had trouble with random tripping
with the Morningstar.
I switched outlet models, thought I fixed it, but its tripping again.
Morningstar's list of approved GFCIs is outdated.
R.Ray Walters
CTO, Solarray, Inc
Nabcep Certified PV Installer,
Lic
Also look at the notes to the tables in Chapter 9. For conduit fill,
all wires are counted. 310.15 covers ampacity derating for more than 3
current carrying conductors in the raceway. The key is "current carrying
conductors". The neutral definitely carries current. You don't have to
count g
That doesn't make sense, the inverter's charger determines the max
charge rate and the max draw from the generator.
The 8.5 kW Kohler should have no problem running the 4.4 kW Magnum.
What is the altitude?
Is it wired for 240 vac ? If the generator is running at 120 vac, then
you are only r
However, in this case, Peter's installing lots of 120 vac branch
circuits, so all of those neutrals will be carrying full current (unless
they are shared neutral circuits). Mike Holt's exception would apply to
240vac circuits if they had a neutral. Further, Holt's exception would
not be appli
FYI, generally we haven't had cold start issues with propane units, as
long as the pipe is sized properly ( as mentioned in another recent
post) and the starter battery is kept fully charged.
This is based on about 20 years experience in the Rockies with temps
below 0, but not 40 below. We don
ttery charging needs to be added foroff grid
Jerry
Sent via the Samsung Galaxy S™ III, an AT&T 4G LTE smartphone
Original message ----
From: Ray Walters
Date:04/28/2016 7:28 AM (GMT-10:00)
To: RE-wrenches
Subject: Re: [RE-wrenches] Off-grid generator update?
FYI, generally w
What's wrong with the chargers being on? Just set the charge settings
(absorb 56 v, and absorb time 5 minutes) fairly low. It will lightly
charge for a few minutes, and then go to float.
Just because your customer imagines this to be a problem, doesn't mean
it actually is. Its not going to hur
n’t want and
I agree to have an additional cycle on the batteries when they don’t need it.
I’m working with OB to find out why this is happening.
Thanks
jay
peltz power
On Apr 29, 2016, at 11:07 AM, Ray Walters wrote:
What's wrong with the chargers being on? Just set the charge se
Hi All;
I'm in the process of finishing a grid tie with battery backup system,
and besides the many pitfalls of this type of work, I destroyed a Tripp
lite surge suppressor when I turned on the system.
The system has a pair of the new Outback VFXR 3524 inverters wired in
120/240 series config.
Could you tell us about the metal conduit vs. Romex installation
differences between the Enphase and SolarEdge?
Thanks,
R.Ray Walters
CTO, Solarray, Inc
Nabcep Certified PV Installer,
Licensed Master Electrician
Solar Design Engineer
303 505-8760
On 8/5/2016 11:54 AM, penobscotso...@midmaine.c
I think the issue has always been locating the right parts, not the
installation. Everyone carries the Cobra X flex, but not the ferrules.
We usually crimp lugs on and use breakers with stud terminals, so the
need for ferrules is minimal.
I have always wondered about the terminal bussbars from
So this may be a dumb question, but I'm assuming wire nuts are not
suitable for Fine strand wire? I agree that most installs are not code
compliant in this regard. Its really tough to find parts or even good
info on this.
R.Ray Walters
CTO, Solarray, Inc
Nabcep Certified PV Installer,
Licens
My guess is that in your case the GTPV will just help alleviate the volt
drop situation. I wouldn't start adding transformers, etc until you are
having a problem. Put in the contract that this extra cost may be
necessary for proper function, but I would keep it as a backup. Based
on the numb
Trojan L 16s have a known issue with premature cell failures. The T105s
seem to still be fine, but I won't sell the L16 anymore.
SG readings don't even matter when you have an obvious cell failure.
Its like doing blood work on a corpse.
R.Ray Walters
CTO, Solarray, Inc
Nabcep Certified PV Ins
My old trick for Wattsun trackers was just to turn them into fixed
racks. Usually the tilt actuator could be hot wired with a 12 v battery
to get summer and winter tilt.
R.Ray Walters
CTO, Solarray, Inc
Nabcep Certified PV Installer,
Licensed Master Electrician
Solar Design Engineer
303 505-87
Hi Gary;
I think it would be a waste of time to load test a sealed battery that
is 9 years old. Even at only 20% discharge, that battery only has 2800
cycles. At 80% discharge, its 550 cycles. The daily system cycle is
probably roughly a 10% cycle, coupled with the frequent deep cycles. We
1) I've used the Euro connectors you show for decades with good
results. Not necessarily legal here, but I like them
2) Before bad mouthing the wire nuts, I've found installer error to
almost always be the problem. In the installation pictured, the wire
nuts are not outdoor rated, and the
Hi Mac;
I'm not sure I understand how you would extend the wires without
splicing. BTW you only need to extend the hots, not the neutrals or
grounds.
*NEC 312.8* sets a cross sectional area limit of 75% for the splices and
wires inside an OCPD Enclosure.
I just found these inline splices to us
Hi Chris;
Its the same as a switch leg for a light. The neutral stays at the
light, only the hot is run down to the switch and back.
Also, with some critical load panel set ups available (ie Generac),
there is no provision to even run the neutrals to the new CLP.
This is cleaner and involves m
HI Drake;
My old Fluke clamp on died last year, and some good Wrench here turned
me on to the Seaward solar power clamp. It does everything the Fluke
did, and offers some amazing power analysis too. It can do real time
power readings that even account for power factor. It can break out THD
Sounds like ovens have gotten more complicated over the years. As soon
as I read "control board" and modified sine wave, I cringe. The good old
DR inverters worked great, I even ran my own shop on one for several
years back in the 90s. I for the most part quit selling them though, as
even tho
Constant pressure pumps are a much better set up. The Grundfos SQE is a
great example. Your well driller is right on target.
However, expecting 10 gpm from a 600 ft deep well off grid is overkill.
I would compromise on that flow rate. 5 gpm will be plenty of water in
most cases, outside of w
This thread actually brings up issues I've struggled with for years too.
QOs are really not good for over 50 v. The panel mount QOUs are
really expensive and special order. I believe they're only good to 125
vdc, so that not much help with higher voltage arrays.
There are much better breakers
Nice work William, thanks for posting all this info. That issue with
mounting the Mate 3 is just ridiculous, I totally agree they need to
make an adapter to interface with regular boxes. They can sell it
separately.
In the 90s it was understood we had to fab our own solutions, but at
this p
Greetings Esteemed Wrenches:
We have a tiny house project, and need to supply the pressure pump. My
go to pump has been the Grundfos MQ series of constant pressure pumps.
They have no start up surge, and don't require an external pressure
switch or pressure tank. For small part time cabins,
ll need a small pressure tank.
jay
peltz power
On Oct 28, 2016, at 1:13 PM, Ray Walters wrote:
Greetings Esteemed Wrenches:
We have a tiny house project, and need to supply the pressure pump. My go to
pump has been the Grundfos MQ series of constant pressure pumps. They have no
start up s
The exception under 690.8(B)(1) definitely applies. All of Midnite'
breakers and boxes are rated for 100% continuous operation. I believe,
this does not apply to their touch safe fuse assemblies, however. Also
FYI, you should be able to use the 90 deg C rating for complying with
110.14 (C)
It almost sounds like someone got in there and tried to reprogram stuff
themselves. Have you installed the proper anti-Gremlin devices?
R.Ray Walters
CTO, Solarray, Inc
Nabcep Certified PV Installer,
Licensed Master Electrician
Solar Design Engineer
303 505-8760
On 11/10/2016 12:34 PM, William
Solarray, Inc
Nabcep Certified PV Installer,
Licensed Master Electrician
Solar Design Engineer
303 505-8760
On 11/10/2016 9:26 PM, William Miller wrote:
Ray:
I have no reason to believe anyone has been meddling. No one knows the
password. It does look like some serious glitch.
William
On Nov 10, 2
ller
*Sent:* Thursday, November 10, 2016 11:26 PM
*To:* RE-wrenches
*Subject:* Re: [RE-wrenches] Outback Programming Ghost
Ray:
I have no reason to believe anyone has been meddling. No one knows the
password. It does look like some serious glitch.
William
On Nov 10, 2016, at 6:25 PM, Ray Walte
Here's the lug you would use for the inverter and batteries
https://www.delcity.net/store/Straight-Tinned-Copper-Lugs/p_810763.h_796015.t_1
It doesn't say here, but on the bag I got, it specifically is listed for
fine strand cables too.
I have 3 crimpers that I use: one like Allan's for the lar
I believe that the reason they don't list actual torque values for drill
settings is that they can vary quite a bit depending on the SOC of the
battery, temperature, drill age, etc.
If its a critical torque application, I would not depend on the drill
settings, but instead do a final tightening
I own the M18, and the power varies noticeably with discharge, and also
with higher amp hour packs. My drill screams with a 5 AH pack! I agree
its less of a drop with discharge than with lead acid or NiiCad, but its
still enough to make torque settings inaccurate.
R.Ray Walters
CTO, Solarray
stem I did, a third party was hired to audit the
PV work. It was on the checklist to spot check torques. I have been
spot-checking torque ever since.
*From:*RE-wrenches [mailto:re-wrenches-boun...@lists.re-wrenches.org]
*On Behalf Of *Ray Walters
*Sent:* Tuesday, November 29, 2016 1:14 P
Hey Dan;
If this just problem just started, I'm with Drake, you could have a
premature cell failure. I also agree with Allan, 2 wire pumps are
certainly problematic on inverters. Many well service folks don't even
install them because they don't last near as long as 3 wire pumps, so
your cu
Also, you didn't specify, but AC and DC are specifically allowed in the
same raceway per 300.3(C)(1). Only If the DC circuits are PV source or
output circuits, then 690.31(B) prevails, which says they can't share a
raceway. But again, as Chris mentions, this restriction does not apply
to dire
I've seen similar weirdness with many systems of various brands. The
issue seems to be having the generator shutting down while still under
load, with as you noted, the frequency and voltage dropping, and the
inverter not transferring quick enough.
Basically I suggest to my customers having si
Greetings All;
I just had the dreaded call from one of my higher profile commercial
clients: a remote radio repeater station had modules ripped off the
frame by high winds.
Two SW285s were damaged. The wind was strong enough to rip right
through the aluminum side rails. We had used the prop
Hi Daryl;
I wonder if the DP&W rack is allowing some bending or torqueing of the
module frame, that over time with thin aluminum causes metal fatigue,
cracking, and finally total failure. Funny both of our isolated
failures involved the same rack. Also, I did more sluething and these
modu
ugs the ground is best. That is a lay opinion, however.
William
Lic 773985
millersolar.com
805-438-5600
-Original Message-
From: RE-wrenches [mailto:re-wrenches-boun...@lists.re-wrenches.org] On
Behalf Of Ray Walters
Sent: Tuesday, January 10, 2017 2:31 PM
To: RE-wrenches
Subject: [RE-wrenches
hat is a lay opinion, however.
William
Lic 773985
millersolar.com
805-438-5600
-Original Message-
From: RE-wrenches [mailto:re-wrenches-boun...@lists.re-wrenches.org] On
Behalf Of Ray Walters
Sent: Tuesday, January 10, 2017 2:31 PM
To: RE-wrenches
Subject: [RE-wrenches] Solar World Wind
ismontana.com <http://www.oasismontana.com>
*From:* RE-wrenches [mailto:re-wrenches-boun...@lists.re-wrenches.org]
*On Behalf Of *Ray Walters
*Sent:* Thursday, January 12, 2017 2:16 PM
*To:* RE-wrenches
*Cc:* Sefchick,
lto:re-wrenches-boun...@lists.re-wrenches.org]
*On Behalf Of *Ray Walters
*Sent:* Thursday, January 12, 2017 5:22 PM
*To:* RE-wrenches
*Subject:* Re: [RE-wrenches] Solar World Wind Damage
Chris & Dana;
Our site is a mountain in Wyoming and does have some focusing effects,
so maybe 170 mph is po
HI Dave;
Based on the evidence, I might suspect a short in the inverter, or the
inverter was feeding a heavy load when the melt down occurred. I can't
see how a short at the battery would cause an inverter failure, unless
the melted lead caused the polarity to be reversed, or created a
positi
When I'm evaluating an old system, one thing I do is really yank on all
the battery connections. If it turns, tighten it down, and in several
cases, the cable just pulls loose from the connector. They are time
consuming to do right. Cable has to be stripped long enough, the
crimper needs to
117 vac is perfect output. If the washing machine is having issues, it
would be with the stepped waveform, not the voltage. The old Trace had
a pretty choppy "pure sine wave". I had washers not run on the Trace
SWs, and we were able to put a capacitor on the inverter output that
fixed the pr
Let Ebay decide. I sold an old SW4024 on there recently. I got $1500
for it, so I'd guess the Outback might be worth $1100?
Ray
On 12/16/2011 3:38 PM, Drake wrote:
A friend has a very early Outback 2024 FX that he is thinking about
selling. It sat in the original box until last year. When
apter that would let
me use that type of breaker on the Flexware box?
Ray Walters
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e only way I work on them with larger wire is with the breaker mounted in the
mounting plate and the mounting plate screwed in, then I bring the wire pre
bent/unstressed to the post.
Jay
Peltz Power
Sent from my iPad
On Dec 16, 2011, at 9:14 PM, Ray Walters wrote:
Hi Folks;
Anybody else
n the load side and be code compliant.
Ray Walters
On 12/22/2011 11:34 AM, Pekka Laine wrote:
All,
We have been contracted to install a 10kW-ac system into a 45-year old house that
has no main service breaker panel, only a 200A fused main switch (Zinsco). There
are five 125 A rated
be 10,965W because the gross power rating as defined by FPL
would be 9,971W.
Jason Szumlanski
Fafco Solar
-Original Message-
From: re-wrenches-boun...@lists.re-wrenches.org
<mailto:re-wrenches-boun...@lists.re-wrenches.org>
[mailto:re-wrenches-boun...@lists.re-wrenches.org
<mai
Original Message
Subject: Re: [RE-wrenches] Landing into a sub-panel without a main
service panel, just a main switch
Date: Fri, 23 Dec 2011 09:41:24 -0700
From: Ray Walters
To: JRQ
HI Jeffrey;
Electricity certainly can flow in both directions on a conductor
a statistical difference, I'm willing to concede the
point.
Jeffrey Quackenbush
--------
*From:* Ray Walters
*To:* RE-wrenches
*Sent:* Friday, December 23, 2011 10:29 PM
*Subject:* [RE-wrenches] Fwd: Re: Landing i
d
in a week delay, and another unpaid 2 hour round trip to fix.
(Outback or Carling care to cover my costs?)
My 2012 resolution: Quit losing money fixing other companies'
problems
Ray Walters
NABCEP Certified Installer
BS Mechanical Engineering
First In
That's great;
As a company, I'm willing to pay more for the breakers with the better
posts, because it will be much cheaper in the end.
Ray
We have just requested that Carling start providing real studs on all
of our C series breakers (MNEDCXX).
boB
Midnite Solar
On 12/27/2011 5:26 P
I, 2nd Allan's recommendation, or better, use sealed batteries, since
its battery backup, and so small. People are bad about battery
maintenance on anything but off grid. You definitely can't afford to
have hydrogen sulfide going up through the building.
Ray Walters
On 12/31/20
We've only had to use Schedule 80 out of the concrete, but never
otherwise had a problem. Is his concern the structure of the concrete?
It's ballast, not a pier that takes a compressive load. We've never had
a problem in 2 decades.
Ray
On 1/3/2012 11:48 AM, Jeff Yago wrote:
Drake,
This
H2 is actually very difficult to contain, and can migrate through most
materials.
A super sealed, very small space, with a lot of charging source, its
possible to reach combustion, but IMHO, you'd have to really try to
create a system to do that. I've had a cell burn off its H2 once, so
yes yo
I've only done it that way when some Bozo forgot to install the conduit
in the concrete. Definitely not the preferred method.
Ray
On 1/3/2012 3:19 PM, Drake wrote:
At 01:48 PM 1/3/2012, you wrote:
This is a very common way to install this conduit, so I really would
like to know how this in
I have a related question to this. Does setting up a pair of Outback
GVFXs with the balancing transformer and allowing one inverter to go to
sleep at lower AC output improve efficiency? It seems we would be
reducing electronic loads, but adding transformer losses. Any
comments? I have a rece
re, I
would pay a bit more for a breaker that didn't snap off in the field, as
its way cheaper than a return trip on an off grid project. Its always
nice to feel like we wrenches in the field are being listened to. We're
really trying to make this better and safer for everyone involved
I have only limited experience with the GIllette, but I was impressed
with the specs on that 15 Kw unit, it was a water cooled 4 cyl running
at 1800 rpm, just what your customer needs, but probably way more than
they want to spend.
Can you add more PV to reduce the generator run time?
Ray
On
Hi Mark;
Robin Gudgel at Midnite was talking about a setting on the Classic that
could do that. I'm not sure how far they went with the concept, but it
definitely is beyond mere theory. I'd check with them, and see where
they were at with that.
Ray Walters
On 1/16/2012 11:0
I've found the Zephyr Power vents to be a little undersized in larger
batteries with arrays over 1000 watts. Still get that smell in the room
outside of the battery box, though its not explosive. That was with the
12 v model. I wouldn't mind seeing someone make a similar vent plumbed
to larg
l slots are filled with PV breakers,
you're off the hook, at least according to Mike Holt, and my self for
the little that matters ;-)
Now you have to convince the AHJ, so you might want to show them Mike's
book on the subject.
Ray Walters
On 1/22/2012 2:13 PM, Rich Nicol wrote:
My take o
That's always been my interpretation as well, reinforced at seminars
with John Wiles and Bill Brooks.
Ray Walters
On 1/23/2012 6:13 PM, Dave Palumbo wrote:
Regarding NEC Article 250.30 Informational Note #1 //
//
My interpretation is that a standard net-metered PV system is
therefor
the definition of separately derived
system.
In the end, I don't believe it matters whether we consider the DC side
to be separately derived or not, as 250.30 only applies to AC, and 690
is now fairly clear about bonding and grounding requirements regardless.
Ray Walters
On 1/24/2012
sell some battery
amp-hrs at $1/ kwh every once in a while.
Ray Walters
On 2/4/2012 7:05 PM, b...@midnitesolar.com wrote:
Sounds like a voltage source (and sinking) inverter to me.
These types can cause current distortion which the UL1741 / IEEE 1547
specs try to prevent.
Apparent must
Hi Chris;
Marco Manglesdorf (on this list) is the man to talk to about that. He
is based in the Hawaiian islands; I only had the good fortune to work
for him for a few projects.
Ray Walters
On 2/6/2012 5:30 PM, Comet Systems wrote:
Ray,
The idea that the utility in an island is seeing an
Hi All;
I just had a customer ask if he could take the federal solar credit for
his PV system on his newly built off grid home.
I always thought you could, but the wording on the IRS form sounded a
bit like you couldn't take it for new construction.
What's the group's opinio
Personally I love my latest LED lights. They have gotten substantially
better just in the past year. We have some 8 watt units in our kitchen
that illuminate just like a 35 watt halogen, beautiful color rendition,
not that blue they used to have.
I especially like my new 1000 lumen spotlight t
No, both golf cart batteries and industrial cells get more cycle life per $.
Ray
On 2/14/2012 1:18 PM, William Miller wrote:
Colleagues:
Do any of you have experience with Interstate L-16 batteries? Are
they a good value?
Thanks in advance,
William Miller
__
Hi Allan;
B&B battery, which I've used for years for sealed battery applications
has excellent charts on discharge rate vs time; just what you need for
your design. I've also found them to have stable voltage under very
heavy loads (electric vehicles) right up until they're fully
discharged.
without over paralleling or breaking the off grid spinster budget.
Ray Walters
On 2/16/2012 6:39 AM, John DeBoever wrote:
Wrenches,
Drake,
Trojan Premium lineL16RE-A, L16RE-B and L16RE-2V are optimized for
renewable energy applications. They offer 1,600 cycles @ 50% DOD @ 77F.
For details
e old bank to a
neighbor, or use it on a separate system.
Ray Walters
On 10/11/2012 5:51 PM, SunHarvest
wrote:
Thanks Allan,
I always value your insight.
There is a TriMetric on this system but I'm look
say the attic, it will interrupt the electricity at
its source, not at the load.
Ray Walters
On 10/13/2012 9:12 AM, Rebecca Lundberg wrote:
Dear fellow wrenches,
Does anyone have suggestions for the 'best' way to keep up with
product availability for meeting 690.11 on DC AFCI? I
I've run a 3 HP well pump off a pair of Outbacks, but make sure you have
plenty of battery behind it. We had shut downs from low voltage, when
the batteries were at 50% charge from the starting surge.
My experience with Magnum has been good, and they have even more surge
current than the Outbac
de of the shunt.
Ray Walters
On 10/15/2012 9:21 AM, jay peltz wrote:
Hi Mac
Check out midnight they have exactly what you need
Jay
Peltz power
Sent from my iPad
On Oct 15, 2012, at 5:24 AM, mac Lewis <mailto:maclew...@gmail.com>> wrote:
Hi Wrenches,
I am looking for a >500A DC
an other wiring.
Ray Walters
On 10/26/2012 12:02 PM, benn kilburn wrote:
Glenn/Jason,
So you wouldn't use romex to feed an exterior outlet on an outside
wall, or to any outside lights???
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Did you get soil tests done? That seems really deep. We have strong
clay soils in New Mexico and Colorado, and I've always gone 4 ft in,
and 6 ft out. Never an issue, with wind gusts that have blown debris and
broken modules. No footing trouble though. I could see in a loose,
sandy soil
So if the Romex is loaded with THHN/THWN (damp/wet rated), and no where
does the outer covering of the Romex itself get exposed to the wet
location, that should be sufficient?
Ray Walters
On 10/26/2012 7:45 PM, Glenn Burt wrote:
300.9 Raceways in Wet Locations Above Grade.
Where raceways
eelings if they don't last very long.
A solid load capacity test would tell you a lot more about them.
Ray Walters
On 11/12/2012 3:55 PM, Allan Sindelar wrote:
Wrenches:
First question: for a large grid-tied with battery backup system (9.8
kW array, two SB5000s, dual Sunny Islands), we h
HI Todd;
That's very interesting. What roof pitch does that happen? I'm
guessing that at a step enough tilt, the frame damage is alleviated?
Also on your tall pole mounts what pole design do you use? I've tried
telescoping type, and guy wires on tall poles.
Ray
On 11/13/2012 12:08 PM, tod
vember 13, 2012 11:12am, "Ray Walters"
said:
HI Todd;
That's very interesting. What roof pitch does that happen? I'm
guessing that at a step enough tilt, the frame damage is alleviated?
Also on your tall pole mounts what pole design do you use? I've tried
telescoping
I would think good old CRC contact cleaner, as the connectors have a
grease coating that collects dust if left unconnected.
Follow up by regreasing with silicon gel as Glenn suggested.
I've been playing around with using unterminated connectors to
temporarily seal up the dangling connectors. Th
hand held LED flash light that is as bright as my car
headlights (1100 lumens) and I still haven't charged its Li+ battery in
6 months. LEDs are the future amigos.
Ray Walters
On 12/5/2012 8:33 PM, William Dorsett wrote:
In the early days, LED's were rated by the candela and so
in winter
scenario will probably cut the run time down by 80%. I've done that
same trick, and the customers loved it, but they moved it in in the
summer as it ran too much in the summer in 85 deg weather.
Ray Walters
On 12/10/2012 9:12 PM, Allan Sindelar wrote:
Wrenches,
We still t
#x27;s built in
low voltage disco keeps the batteries from getting ruined if the charge
system is down, but loads stay on.
I lived for years with a DC fridge, and my family has no desire to go back.
Ray Walters
12/11/2012 12:54 PM, Jason Lerner wrote:
Hello Larry,
I still install DC fridge/
Array direct is definitely better as Stephen points out, and I've built
units that run a fan other visibly moving device. Definitely don't want
to roof mount the module, as others pointed out, you want the kids to be
able to experiment with angles and shading. Throwing in some analog
meters f
re. My overall foot print is
less than building a new "efficient" home out in the vanishing wilderness.
I've tried it all, and that's just where I landed for now. I'm
currently working on an off grid PV charging system for a customer's
Chevy Volt, though, so I&#x
company
that has been doing tracking right for decades.
Ray Walters
On 12/15/2012 10:59 AM, Bill Turberville wrote:
Does anyone have suggestions for a 50KW single axis tracker system.
This is going on top of a berm that does not run east-west
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