functional yet, the
SOC management, based on the FNDC would “communicate” with the FX inverters and
the charge controllers if everything is via the hub. This could be beneficial
in systems where you have both solar and generator / grid charging going on.
Thanks,
Walt
Walt Ratterman
SunEnergy
voltage drop, and (b) there IS protection at the equipment room on the homeruns
from the combiners to the equipment room (assuming the combiners are at the
array) as long as we have individual circuit breakers on the input of each
charge controller.
Thanks,
Walt
Walt Ratterman
phone then.
Thanks,
Walt
Walt Ratterman
SunEnergy Power International
11 Laurel Lane South Washougal, WA 98671
(360)-837-3680 ▪ fax (360)-837-1315 ▪ Skype Walt-Mobile
wratter...@sunepi.org ▪ www.SunEPI.org <http://www.sunepi.org/>
Fr
Two answers, Jay,
Actually both.
For a lot of systems, we use the ILSCO or POLARIS multi-barrel insulated
mechanical compression device that holds up to 8 or more cables up to
whatever size you purchase them in.
Then, for larger systems, we use standard, 1/4 x 4" copper bus bar with
isolating bu
Michael:
The bus bar solution has to do at least partially, with:
- Equal resistance paths to each string of batteries (need to keep the
circuit cables the same length).
- Ability to remove (isolate) a string more easily.
With two strings, if the bus bar capacity exists in the hardware of the
Hello Chris,
We use the Polaris Insultaps all the time, but we have usually used them for
the battery paralleling only. Are you using these for the negative common bus
bar as well (in place of the bus bar in the flexware??) And are you doing the
same thing for the positive bus bar?
Thanks
W
Hello Travis,
Just for my $.02..
I gave up a while ago on the textbook 3 days of autonomy, but for a slightly
different reason (including yours).
We would give a battery bank 3 days of autonomy, and then place all kinds of
alarms and load shedding at 50% SOC, but nothing to tell folks w
It seems you are saying that the batteries are 12V batteries. And, as there
are 40 of them, this would indicate you have about 10 parallel strings. It
would have been difficult to keep this battery bank properly charged even if
the charging parameters were appropriate.
One string is best, two
Glenn:
This is correct on the battery bank separation.
You don't split out the battery banks until you reach a "cluster". For
example, one three phase setup is a cluster. If you have two, three-phase
setups - you have two clusters - and two battery banks.
And.I think if you check thro
– confirming that
prevailing wages are required, and giving what tasks need to be done under what
labor classification.
Walt
Walt Ratterman
SunEnergy Power International
11 Laurel Lane South Washougal, WA 98671
(360)-837-3680 ▪ fax (360)-837-1315 ▪ Skype Walt-Mobile
Hello guys...
I believe (but I can be wrong) that the code is pretty clear on this.
. No problem with the metal conduit.
. Use bonding bushing on the ends (to be sure that the conduit is
bonded)
. No problem with the ground wire touching the conduit - in fact the
b
PM
To: RE-wrenches
Cc: Walt Ratterman
Subject: Re: [RE-wrenches] Sunny Island DC Load Centers, Sealed Batteries
Walter, Kirpal,
Nice install in Burundi! I'm wondering about the battery cables - how did
you connect the battery lugs on the 2/0 (?) cable to the SI's? Is this an
SM
back boxes restricted for
"vertical installation only"?
I've got my own 3 phase Sunny Island thing coming up (maybe) so I look
forward to these answers.
Mick Abraham, Proprietor
www.abrahamsolar.com
Voice: 970-731-4675
On Wed, Oct 7, 2009 at 7:26 PM, Walt Ratterman
wrote:
Hello Kirpal
Hello Kirpal,
Walt Ratterman here. I can respond to at least the first part.
In Burundi, we used three 5 KW Sunny Island 5048's in a three phase
configuration.
For all of the DC and AC breakers, wireways, etc., etc., we used the Outback
Flexware equipment.
We put the DC o
Peter,
The DEKA charging manual that I have been working from for their sealed
batteries (AGM and Gel) quote 30% of C20.
And
.DEKAs literature also has a maximum charging voltage of 2.35 VPC.
Not sure about the other brands.
Thanks,
Walt
From: re-wrenches-boun...@lists.re-w
list if you are interested.
Maybe we can compare notes.
See ya,
Walt
Walt Ratterman
SunEnergy Power International
11 Laurel Lane South Washougal, WA 98671
(360)-837-3680 ▪ fax (360)-837-1315 ▪ Skype Walt-Mobile
wratter...@sunepi.org ▪ www.SunEPI.org
Hello Lee,
Walt here.
I will be leaving for Haiti in about a week, and be there for three….
We have done lots of schools. If you are strictly 12V, your choices primarily
are 12V CF and LED lights. There are lots of pros and cons to both.
The real question is what you intend to us
I would recommend the Morningstar controller. There is a model (I don't
have the catalog here) with a good timer, and LVD and good environmental
controls, and electronic circuit protection.
Walt
-Original Message-
From: re-wrenches-boun...@lists.re-wrenches.org
[mailto:re-wrenches-boun
998 Shari Ave
Yuma, AZ 85365
On Jun 30, 2009, at 2:43 PM, Walt Ratterman wrote:
Hello,
Why do you say that AGM batteries are a better choice?
I have been reading about the differences, and all I see (comparing DEKA Gel
versus DEKA AGM is that the cycle life of the AGM (at 50
http://www.wind-sun.com/ForumVB/
..
- Original Message -
From: Walt Ratterman <mailto:wratter...@sunenergypower.com>
To: 'Rick <mailto:r...@blueskyenergyinc.com> Cullen -
ailto:re-wrenches-boun...@lists.re-wrenches.org] On Behalf Of Walt Ratterman
Sent: Friday, June 26, 2009 3:22 PM
To: 'RE-wrenches'
Subject: [RE-wrenches] Solar Boost Controller in Senegal
Hello,
I am in a very remote part of Senegal, (near the Guinea and Mali borders…) and
I have
_
From: re-wrenches-boun...@lists.re-wrenches.org
[mailto:re-wrenches-boun...@lists.re-wrenches.org] On Behalf Of Walt Ratterman
Sent: Friday, June 26, 2009 3:22 PM
To: 'RE-wrenches'
Subject: [RE-wrenches] Solar Boost Controller in Senegal
Hello,
I am in a very remote part
.
>> Northern Arizona Wind & Sun - Electricity From The Sun Since 1979
>> Online Store: http://store.solar-electric.com/
>> Solar Discussion Forum: http://www.wind-sun.com/ForumVB/
>>
....
...
Walt Ratterman
SunEnergy Power International
11 Laurel Lane South Washougal, WA 98671
(360)-837-3680 ▪ fax (360)-837-1315 ▪ Skype Walt-Mobile
wratter...@sunepi.org ▪ www.SunEPI.org <http://www.sunepi.org/>
___
List spo
Island to let it know whether it is working on the Grid parameters or
on the Generator parameters. If the parameters are the same, I guess it
doesn't matter.
Thanks,
Walt
Walt Ratterman
SunEnergy Power International
www.sunepi.org
-Original Message-
From: r
Drake:
The voltage lost between the two points is the product of the current
flowing in the wire, and the resistance of that section of wire (times 2
depending on how you figure the distance.).
Walt
From: re-wrenches-boun...@lists.re-wrenches.org
[mailto:re-wrenches-boun...@lists.re-wre
, and last year. In some ways (in many ways) they need help more now than
they did in late 2001.
The difficulty is doing things in large quantities effectively, and working
through governments. In most cases neither is feasible.
Thanks a lot for your thoughts.
Walt
Walt Ratterman
Howie,
I can only add that we have installed all of our FNDC voltage sensing wires
to the busses in the FW1000 can and have no problem. That is kind of a
reverse affirmation, I guess.
Walt Ratterman
SunEnergy Power International
www.sunepi.org
-Original Message-
From: re-wrenches
work with PV only? (no generator, no grid, no batteries??)
Thanks,
Walt Ratterman
SunEnergy Power
www.sunepi.org
-Original Message-
From: re-wrenches-boun...@lists.re-wrenches.org
[mailto:re-wrenches-boun...@lists.re-wrenches.org] On Behalf Of Darryl
Thayer
Sent: Friday, March 13, 20
Max,
I would like to learn from this as well. I do a good bit of off-grid systems
connected to large generators.
Thanks,
Walt Ratterman
Walt Ratterman
SunEnergy Power International
11 Laurel Lane South Washougal, WA 98671
(360)-837-3680 ▪ fax (360)-837-1315 ▪
– large grid = pv / diesel hybrid,
at least in my book.
Walt Ratterman
SunEnergy Power International
www.sunepi.org
From: re-wrenches-boun...@lists.re-wrenches.org
[mailto:re-wrenches-boun...@lists.re-wrenches.org] On Behalf Of Joel Davidson
Sent: Tuesday, March 03, 2009 6:07 PM
To: jry
, but the tricky
part is being able to set the voltage on and off points. We are dealing with
both 48V and 24VDC systems.
Thanks,
Walt
Walt Ratterman
SunEnergy Power International
11 Laurel Lane South Washougal, WA 98671
(360)-837-3680 ▪ fax (360)-837-1315 ▪ Skype
Nick:
I am pretty sure you can put two of the inverters on Phase A, one on Phase
B, and one on Phase C
Will this make any difference to the owner?
Walt Ratterman
SunEnergy Power International
www.sunepi.org
-Original Message-
From: re-wrenches-boun...@lists.re-wrenches.org
don't have any experience with the Trojan L-16's yet, but probably will
soon...
Take care,
Walt Ratterman
SunEnergy Power International
www.sunepi.org
-Original Message-
From: re-wrenches-boun...@lists.re-wrenches.org
[mailto:re-wrenches-boun...@lists.re-wrenches.org] On Behal
Walt Ratterman here.
All of my work is done overseas, but I gave up on automatic generator
starting years ago. I now make extensive use of the relays for alarms, and
load shedding, but not automatic generator starting. I am a firm believer
that this needs to remain a people-thing for
Round trip...
(unless you are using a table that has already counted this in)
Take care,
Walt
From: [EMAIL PROTECTED]
[mailto:[EMAIL PROTECTED] On Behalf Of Marco
Sent: Monday, December 08, 2008 2:13 PM
To: re-wrenches@lists.re-wrenches.org
Subject: [RE-wrenches] voltag drop
I feel
th no generator
(the smaller systems) installations with many days of autonomy simply almost
never get charged back to full after the first few days of clouds, unless
the PV array is oversized AND the users cut way back on their loads.
Sorry about no documentation....
Take care,
Walt Ratterman
2 of
> the 4448 inverters will each put about 60 amps DC into a battery bank with
> only 17 amps in @ 240 volts or 34 amps ac @ 120 volts.
>
>
> Just another wrenches opinion,
> Bob
>
> On Tue, Sep 30, 2008 at 10:57 AM, Walt Ratterman <[EMAIL PROTECTED]> wr
There are mechanical control systems that automatically control the flow
(such as the old fly-ball mechanisms), but these are very expensive, and
generally not such a good idea until you get up to the larger sizes.
The introduction of electronic load control (where you accept all of the
flow and p
,
Walt
Walt Ratterman
SunEnergy Power International
11 Laurel Lane South Washougal, WA 98671
(360)-837-3680 ▪ fax (360)-837-1315 ▪ Skype Walt-Mobile
<mailto:[EMAIL PROTECTED]> [EMAIL PROTECTED] ▪<http://www.sunepi.org/>
ww
/lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org
List rules & etiquette:
www.re-wrenches.org/etiquette.htm
Check out participant bios:
www.members.re-wrenches.org
Walt Ratterman
Sent Wirelessly
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coming in from the panels (if we are forced to stay with
12V) is right at 60 amps.
To get the low voltage disconnect function, do you see any problem going with
multiple PS-30M charge controllers, and using just one of them for the 40W load?
Thanks,
Walt
Walt Ratterman
SunEnergy
to learn more about the wireless solutions (but our
spplications are not candidates for digital cell phones, or wireless
internet...)
Thanks
Walt
SunEnergy Power
www.SunEPI.org
Walt Ratterman
Sent Wirelessly
-Original Message-
From: "Allan Sindelar" <[EMAIL PROTECTED]&g
et at either 46 V or higher.
Walt Ratterman
SunEnergy Power International
www.sunepi.org
From: [EMAIL PROTECTED]
[mailto:[EMAIL PROTECTED] On Behalf Of Tump
Sent: Thursday, August 28, 2008 12:54 PM
To: re-wrenches@lists.re-wrenches.org
Subject: [RE-wrenches] battery reference gen start m
i.org
Walt Ratterman
Sent Wirelessly
-Original Message-
From: "Wind-sun.com" <[EMAIL PROTECTED]>
Date: Fri, 22 Aug 2008 08:46:28
To: RE-wrenches
Subject: Re: [RE-wrenches] Braided grounding wire
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List sponsored by Home Power
.
All that being said, keeping the above caveats in mind, I know we would
always entertain donations of good equipment, and I would think most folks
doing the kind of work we do would also.
Hope that helps,
Walt Ratterman
SunEnergy Power International
From: [EMAIL PROTECTED]
[mailto
the new generation
of LED's are actually pretty good. The lumens/watt for these bulbs is 41
lumens/watt which is about the same as this new light.
It will be good to see if this new light will be produced in other than 12VDC
versions...
Thanks for the link,
Walt
Walt Ratterman
SunE
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