I only supply L-16s at my cost to clients with existing banks than
have failures. It has been hazy of course as to what is due to poor
maintenance and what is due to defective batteries.
There was a Trojan Rep on the list. If you are still here, please chime in.
At 10:56 AM 8/24/2016, you wrote:
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
303 505-8760On 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:
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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