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
and the
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
on the 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/
From: re
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
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
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
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
– 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
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
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
wratter...@sunenergypower.com wrote:
Hello Kirpal
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
SMA approved
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:
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 come across some prefabricated “plug and play” American made systems
://www.wind-sun.com/ForumVB/
..
- Original Message -
From: Walt Ratterman mailto:wratter...@sunenergypower.com
To: 'Rick mailto:r...@blueskyenergyinc.com Cullen - Blue Sky Energy, Inc.' ;
'RE
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% DOD) is 500 cycles
versus 1000 cycles
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...@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 come
: http://www.wind-sun.com/ForumVB/
..
- Original Message -
*From:* Walt Ratterman mailto:wratter...@sunenergypower.com
*To:* 'RE-wrenches' mailto:re-wrenches@lists.re-wrenches.org
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
, 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
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
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 Behalf Of Travis
Creswell
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
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] wrote:
Hello all,
We have an application in Haiti (and some African
-wrenches.org/pipermail/re-wrenches-re-wrenches.org
List rules etiquette:
www.re-wrenches.org/etiquette.htm
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Walt Ratterman
Sent Wirelessly
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