The charge set points were a little low.
Probably not overcharged or under (much). There may possibly have
been a low battery incident or two. It is my suspicion, but is not
backed by any testimony to confirm.
The location is inside where it doesn't get extremes of temperature.
At 10:46 AM 8/24/2016, you wrote:
Hi drake,
The early failure of other batteries brings up questions
Charge set points?
Frequent overcharge, possible but damn unusual
Frequent undercharge?
Hi heat location?
Offgrid?
Ongrid?
Battery type?
Jay
Peltz power.
On Aug 24, 2016, at 7:36 AM, Drake
<<mailto:drake.chamber...@redwoodalliance.org>drake.chamber...@redwoodalliance.org>
wrote:
The batteries were tested with a glass bulb, turkey baster type
hydrometer. The SG read higher than the scale on all the batteries.
The electrolyte was clear. The batteries were not too old, maybe
three years, with some newer ones, as others in the bank had
failed. The corrosion was notable. I did not install the batteries,
so don't know if the battery jumpers were cleaned at installation.
Could terminal corrosion have aggravated the problem in anyway?
At 10:01 AM 8/24/2016, you wrote:
Content-Type: multipart/related;
boundary="----=_NextPart_000_0010_01D1FDDD.B1B27F40"
Content-Language: en-us
How are you reading the SG?
__________________________________________________________
Dana Orzel
Great Solar Works, Inc - NABCEP # 051112-136
<mailto:d...@solarwork.com>d...@solarwork.com - www.solarwork.com
O - 970.626.5253 F - 970.626.4140 c - 208.721.7003
"Responsible Technologies for Responsible People since 1988"
From: RE-wrenches [
mailto:re-wrenches-boun...@lists.re-wrenches.org] On Behalf Of Drake
Sent: Tuesday, August 23, 2016 7:45 PM
To: RE-wrenches
Subject: [RE-wrenches] Battery issue
Hello Wrenches,
I was analyzing a string of 8 Trojan L-16 batteries with badly
corroded terminals. The specific gravity read perfect on each
battery. Two of the batteries read low voltage; about 4.2 volts.It
seems like one cell's worth of voltage wasn't showing up on each
battery. Has anyone seen this before?
What would cause this? How can the specific gravity be right?
Thanks,
Drake
Drake Chamberlin
Athens Electric LLC
OH License 44810
CO License 3773
NABCEP Certified Solar PV
740-448-7328
<http://athens-electric.com/>http://athens-electric.com/
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