He’s very reasonable way other than trial and error to determine which battery has the shorted cell in it?
> On Jun 29, 2018, at 21:21, Chuck McCown <[email protected]> wrote: > > Any time you have cells or batts in parallel and one of the cells shorts, the > whole system drops 2 volts. (if lead acid chemistry). > > -----Original Message----- From: Matt Hoppes > Sent: Friday, June 29, 2018 6:45 PM > To: AnimalFarm Microwave Users Group > Subject: Re: [AFMUG] Fun with a solar site > > Robert, that was my first thought as well but why would connecting additional > batteries suddenly drop the overall voltage? Do you think that is just the > cells can’t put out enough to charge everything so the overall output voltage > goes down? > >> On Jun 29, 2018, at 20:38, Robert <[email protected]> wrote: >> >> hosed cell(s) >> >>> On 6/29/18 5:12 PM, Matt Hoppes wrote: >>> I’m currently about halfway through troubleshooting a solar site and had to >>> quit for the day. >>> I have a site with five 100 amp hour batteries. It is a 12 V site and I >>> have three of the batteries on to wire leads going to the charge controller >>> and two of the batteries on a wire lead going to the charge controller. >>> I have been seeing something weird for the past three months where during >>> the day on a sunny day we never hit and plateau at about 12.5 12.7 V like >>> we used to. >>> Instead it will get up to about 12.2 or 12.3 and then do this weird saw >>> tooth pattern. Today when I was at the site I disconnected the secondary >>> battery group of three batteries and things went up to 12.5 V and plateaued. >>> When I reconnected the three batteries it went down to 12.2 and started >>> doing the weird saw tooth pattern. >>> What do those of you who have worked with solar before think? Might this >>> indicate a bad cell or battery? Or some kind of an issue with not enough >>> voltage or amps being pushed into the battery strings? Or something else? >>> I should also mention that normally this site is able to maintain itself, >>> but in its current state it maintains a very steady decay until the >>> batteries are finally drained and I’ve had to boost it once with a charger. >> >> -- >> AF mailing list >> [email protected] >> http://af.afmug.com/mailman/listinfo/af_af.afmug.com > > -- > AF mailing list > [email protected] > http://af.afmug.com/mailman/listinfo/af_af.afmug.com > > -- > AF mailing list > [email protected] > http://af.afmug.com/mailman/listinfo/af_af.afmug.com -- AF mailing list [email protected] http://af.afmug.com/mailman/listinfo/af_af.afmug.com
