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 Installer,
Licensed Master Electrician
Solar Design Engineer
303 505-8760
On 8/24/2016 8:36 AM, Drake 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:
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How are you reading the SG?
__________________________________________________________
*Dana Orzel*
Great Solar Works, Inc - NABCEP # 051112-136
d...@solarwork.com <mailto:d...@solarwork.com> - www.solarwork.com
<http://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
<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/
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