[RE-wrenches] Battery issue
Ray Walters
ray at solarray.com
Wed Aug 24 07:56:56 PDT 2016
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:
>> 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
>> dana at solarwork.com <mailto:dana at 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-bounces at lists.re-wrenches.org
>> <mailto:re-wrenches-bounces at 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/
>>
>>
>>
>> Image removed by sender. Avast logo
>> <https://www.avast.com/sig-email?utm_medium=email&utm_source=link&utm_campaign=sig-email&utm_content=emailclient>
>>
>> This email has been checked for viruses by Avast antivirus software.
>> www.avast.com
>> <https://www.avast.com/sig-email?utm_medium=email&utm_source=link&utm_campaign=sig-email&utm_content=emailclient>
>>
>>
>>
>>
>> _______________________________________________
>> List sponsored by Redwood Alliance
>>
>> List Address: RE-wrenches at lists.re-wrenches.org
>>
>> Change listserver email address & settings:
>> http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org
>>
>> List-Archive:
>> http://www.mail-archive.com/re-wrenches@lists.re-wrenches.org/maillist.html
>>
>>
>> List rules & etiquette:
>> www.re-wrenches.org/etiquette.htm
>> <http://www.re-wrenches.org/etiquette.htm>
>>
>> Check out or update participant bios:
>> www.members.re-wrenches.org <http://www.members.re-wrenches.org/>
>
>
> ------------------------------------------------------------------------
> Avast logo
> <https://www.avast.com/sig-email?utm_medium=email&utm_source=link&utm_campaign=sig-email&utm_content=emailclient>
>
>
> This email has been checked for viruses by Avast antivirus software.
> www.avast.com
> <https://www.avast.com/sig-email?utm_medium=email&utm_source=link&utm_campaign=sig-email&utm_content=emailclient>
>
>
>
>
>
> _______________________________________________
> List sponsored by Redwood Alliance
>
> List Address: RE-wrenches at lists.re-wrenches.org
>
> Change listserver email address & settings:
> http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org
>
> List-Archive: http://www.mail-archive.com/re-wrenches@lists.re-wrenches.org/maillist.html
>
> List rules & etiquette:
> www.re-wrenches.org/etiquette.htm
>
> Check out or update participant bios:
> www.members.re-wrenches.org
>
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org/attachments/20160824/5ccfc6d2/attachment-0002.html>
-------------- next part --------------
A non-text attachment was scrubbed...
Name: not available
Type: image/jpeg
Size: 823 bytes
Desc: not available
URL: <http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org/attachments/20160824/5ccfc6d2/attachment-0002.jpe>
More information about the RE-wrenches
mailing list