This is not uncommon. Main reason for taking cell voltage AND Spg. If all the Spgs are good then and the voltage reads 2.5/Vpc low then the lead oxide has been depleted on the plate and is sitting in the bottom of that cell. When this happens usually the acid in that cell, if it is a positive plate, will be brown in color.
> On Aug 23, 2016, at 9:44 PM, Drake <drake.chamber...@redwoodalliance.org> > wrote: > > 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/> > > > > > <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@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 > > t...@swnl.net > <blocked::mailto:t...@swnl.net%22%20%5Co%20%22blocked::mailto:t...@swnl.net> > www.SWNL.net > <blocked::http://www.swnl.net/%22%20%5Co%20%22blocked::http://www.swnl.net/> > Solarwinds Northernlights > Serving Mid Coast Maine & Northern California > 207-832-7574 Cl. 610-517-8401 > > Blair "TUMP" May > ******** MAINE'S CHARTER ******** > NABCEP "Certified PV Installer" > > ******** MAINE'S CHARTER ******** > Trace Xantrex "Certified" Dealer / Installer" >
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