This is a premature failure, possibly a manu defect and may be addressed under a prorated wttee. That being said corrosion in a L16 type of battery can be caused by customer over filling the battery causing excessive electrolyte to stay on the top of the battery or bad post seal. in older batteries excessive internal cell pressure, caused by heavy charging cycles causing the vent in the cap to become plugged w/ lead sulfate, forcing gas out around the post seal. I would say that this is the leading cause of corrosion. Check w/ Trojan and see if they are interested in a warrantee. > On Aug 24, 2016, at 10:36 AM, Drake <[email protected]> > 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 >> [email protected] <mailto:[email protected]> - 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:[email protected] >> <mailto:[email protected]>] 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/> >> >> >> >> <19c8c74b.jpg> >> <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: [email protected] >> >> Change listserver email address & settings: >> http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org >> <http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org> >> >> List-Archive: >> http://www.mail-archive.com/[email protected]/maillist.html >> <http://www.mail-archive.com/[email protected]/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/> > > > <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: [email protected] > > Change listserver email address & settings: > http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org > > List-Archive: > http://www.mail-archive.com/[email protected]/maillist.html > > List rules & etiquette: > www.re-wrenches.org/etiquette.htm > > Check out or update participant bios: > www.members.re-wrenches.org >
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