Ron, I'll pipe in here. If the module "works" when he bypasses the diodes, then the diodes, or the solder connections on the ribbons or the diodes, must be at fault.
I put "works" in quotes because we don't have the details on the meter readings. Brian AEE Solar -----Original Message----- From: RE-wrenches [mailto:re-wrenches-boun...@lists.re-wrenches.org] On Behalf Of Ron Young Sent: Tuesday, September 15, 2015 11:45 PM To: RE-wrenches Subject: Re: [RE-wrenches] panel failure Thanks Allan, I was wondering about the lack of response as this group is always very helpful. One begins to suspect the phantom cause, i.e. the rest of the story that wasn’t told to us by the customer. It happens from time to time ;-) Ron > On Sep 15, 2015, at 9:07 PM, Allan Sindelar <al...@sindelarsolar.com> > wrote: > > Ron, > The lack of response may indeed be your answer. I didn't reply because it > hasn't happened on my watch and I have no idea what would cause what you > describe. > Allan > >> 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 _______________________________________________ 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
