Wrenches, William Yes, not as unusual as you might think, BP's did it, Suntec had numerous issues, even Sharp
On Fri, Jun 26, 2020, 3:27 PM William Miller <will...@millersolar.com> wrote: > Friends and colleagues: > > > > I recently performed a service call at a grid-tied installation we did in > 2003. The homeowner noticed the daily consumption had declined to about > 1/3 of typical sometime in the last year. Sure enough 2 of the three > strings (30 mods in total) of Siemens SP150s showed low voltage. > > > > When I tilted up two of the racks to expose one dead string of 10, I found > that 6 of the 10 panels had 1/3 or 2/3 of the expected OC voltage. Testing > of the individual strings indicated that 1 or 2 strings were dead on each > affected panel. > > > > Close examination revealed pinpoint heat damage on inter-cell traces. The > diodes tested good. See photo below. > > > > > > I am surprised to see such a high rate of failure. Has anyone else > experienced this with these or other panels? > > > > Is anyone servicing warranty claims on these ancient panels? I doubt > there is much value left in the warranty but I am curious. > > > > Thanks in advance. > > > > William Miller > _______________________________________________ > 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 > >
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