HI Ron, Lighting is possible of course, but I’d guess that one or more had failed some time ago. It was only when enough failed that it didn’t charge and thats when you found out.
At least thats when my customer found out. These were astropower’s. jay peltz power. > On Sep 17, 2015, at 3:02 PM, RM You <solarea...@solareagle.com> wrote: > > Great thanks for the reply Jay, at least I know someone else has seen the > same thing. Odd that it would just happen on 4 panels unexplainably. Maybe a > transient from a lightning strike or something. > > Ron > >> On Sep 16, 2015, at 7:37 AM, jay <jay.pe...@gmail.com> wrote: >> >> HI Ron, >> >> I have seen this a few times. And just a month or so ago. >> >> You can measure VOC and its right. You can measure ISC and its right, but >> no power. >> >> As someone said, there is a weak/bad connection. Usually its on a main >> ribbon. >> Its just barely making connection. Enough you can get VOC. And when you go >> for ISC with good sun, it’ll arc and give you good connection there. >> But for reasons I don’t understand, it doesn’t always make that connection >> for power. >> >> I even had one module that if you shorted it (ISC) and then connected it to >> load it would work, but next morning, nothing. >> >> I’d check the junction box first, but you might also find something in the >> main ribbon connections. A thermal gun might find it. >> >> good luck, >> >> jay >> >> peltz power >> sent 7:37am 9/16/15 >> >> >>> On Sep 15, 2015, at 8:30 PM, RM You <solarea...@solareagle.com> wrote: >>> >>> Just wondering if any esteemed wrenches have an idea what could cause this >>> problem? Customer says nothing unusual happened that he is aware of and the >>> panels had been working fine for many years but now 4 of 6 panels just >>> quit. Doesn’t appear to be a diode failure. >>> >>> Ron >>> >>>> On Sep 11, 2015, at 4:58 PM, RM You <solarea...@solareagle.com> wrote: >>>> >>>> I have a customer who has 6 siemens 48w panels that are 20 years old >>>> (hooked in parallel to a 12v battery). He says that 4 of them have failed >>>> in that there is no output unless he bypasses the diodes. However he >>>> pulled the diodes and checked them on a diode check and separately on a >>>> battery with a light bulb and they appear to be functioning correctly. Any >>>> ideas what could be causing this anomaly? >>>> >>>> Ron Young >>>> >>> >>> >>> >> >> _______________________________________________ >> 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 >> > > _______________________________________________ > 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 > _______________________________________________ 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
