I do you have a fuse on each battery which I found interesting and now I’m sort of wondering if that isn’t the case they all share the same voltage I’ve even had them disconnected since about noon today and none show drained more than another one.
> On Jun 29, 2018, at 21:54, Chuck McCown <[email protected]> wrote: > > You can avoid this in the future if you have a fuse on each battery. > (This only works with parallel arrays, not series arrays). > > When a cell shorts, that battery will have much higher current until all the > other batts discharge into it down to the new voltage. Just make the fuse > higher by a little bit than the max charging current. > > -----Original Message----- From: Matt Hoppes > Sent: Friday, June 29, 2018 7:46 PM > To: AnimalFarm Microwave Users Group > Subject: Re: [AFMUG] Fun with a solar site > > OK that’s what I was wondering. thanks Chuck, a wealth of information as > always. > >> 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 > > -- > 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
