--- On *Wed, 7/21/10, Dana /<d...@solarwork.com>/* wrote:
From: Dana <d...@solarwork.com>
Subject: [RE-wrenches] RETURN AMP SETTING
To: "'RE-wrenches'" <re-wrenches@lists.re-wrenches.org>
Date: Wednesday, July 21, 2010, 5:54 PM
As the % of full charge is related to the of degree absorption &
gravity [the denser & more charged acid descending, and lighter
acid rising] @ what point in the absorption would be prudent to
stop charging?
I used to cut off the charge on the Trace SW series at 12 “return
amps”, VS. the factory default I think was at 5 amps. This has &
continues to work well but I never had anyone really answer this
function clearly.
Is there a battery manufacturer or wrench that would care to
comment on the:
The minimum “Return” amps to disconnect for a “full” charge?
OR
The time required per 100 AHR after reaching the Absorption point
setting for the mix to occur?
I realize that battery construction, battery condition, age and
temperature and the current power usage will also play into this
factor and it may not be a simple answer.
Dana Orzel
Great Solar Works, Inc
E - d...@solarwork.com
V - 970.626.5253
F - 970.626.4140
C - 970.209.4076
web - www.solarwork.com
Responsible Technologies for Responsible People since 1988"
*From:* re-wrenches-boun...@lists.re-wrenches.org
[mailto:re-wrenches-boun...@lists.re-wrenches.org] *On Behalf Of
*Mark Frye
*Sent:* Wednesday, July 21, 2010 4:25 PM
*To:* al...@positiveenergysolar.com; 'RE-wrenches'
*Subject:* Re: [RE-wrenches] Propane Generator, Dual Outback Inverters
Allen,
Can I infer that if you are shutting off the gen before charge
rates drop in absorption that you are running only briefly in the
absorb phase? Or do your charge currents remain high through out
an extended absortion phase?
Perhaps you have plenty of PV which you rely upon to bring the
batteries up through the absorption phase, once the gen is shut off.
I would be interest to learn more about your approach to this.
Thanks,
Mark Frye
Berkeley Solar Electric Systems
303 Redbud Way
Nevada City, CA 95959
(530) 401-8024
www.berkeleysolar.com <http://www.berkeleysolar.com/>
------------------------------------------------------------------------
*From:* re-wrenches-boun...@lists.re-wrenches.org
[mailto:re-wrenches-boun...@lists.re-wrenches.org] *On Behalf Of
*Allan Sindelar
*Sent:* Wednesday, July 21, 2010 3:17 PM
*To:* re-wrenches@lists.re-wrenches.org
*Subject:* Re: [RE-wrenches] Propane Generator, Dual Outback Inverters
The Onan RS20000 shown in the generators article in HP 131 page 98
has performed flawlessly as backup support to an Outback
quad-stack of VFX3648s. Differences, however, are that this 20kW
gennie charges four inverters, rather than two; the elevation is
6,600 feet for about a 20% output deration; there are no huge
loads above charging draw; and the client is aware enough to shut
it off before absorption reduces the charge rate - all different
conditions than you have described, as the gennie is usually fully
loaded and running in balance.
Darryl is right about the amount of words necessary.
*Allan** Sindelar*
_alla...@positiveenergysolar.com_
</mc/compose?to=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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