So what does it mean if all of the batteries have the same voltage > On Jun 29, 2018, at 21:38, Chuck McCown <[email protected]> wrote: > > Disconnect one terminal of the battery and measure the voltage. The battery > with the shorted cell will have a lower voltage. > > Or, during charging, just put your hand on the batts. The shorted cell bat > will run warmer. > > -----Original Message----- From: Matt Hoppes > Sent: Friday, June 29, 2018 7:30 PM > To: AnimalFarm Microwave Users Group > Subject: Re: [AFMUG] Fun with a solar site > > 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 > > -- > AF mailing list > [email protected] > http://af.afmug.com/mailman/listinfo/af_af.afmug.com
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