Kent I can assume there is no backsheet external damage, These look cell fractures, more common on poly, they may be cause of manufacturing or a result of overheating traces or both. Run an IR Curve test and see if this is resulting in decreased output. Sharp had a similar issue when they stepped up to the 200 larger modules some 20 years ago. Fun times
On Sun, Jul 16, 2023, 2:59 PM Kent via RE-wrenches < re-wrenches@lists.re-wrenches.org> wrote: > Found some damage to a customer's Grape CS-S-180-DJ PV modules this > morning. Unlike anything I've ever seen; so I'm hoping that someone on this > list can tell me the cause. I've put several photos of the cells online > <https://drive.google.com/drive/folders/1nQhTqahEx4whmmWyy89tqaEEGvzkvEps?usp=sharing> > so you can inspect them. While it looks like there has been some localized > heating on the traces, there isn't any evidence of damage on the rear of > the PV modules. These are on an off grid system charging some 12-volt > batteries. Thanks. > > Kent Osterberg > Blue Mountain Solar > _______________________________________________ > List sponsored by Redwood Alliance > > Pay optional member dues here: http://re-wrenches.org > > 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 > > There are two list archives for searching. When one doesn't work, try the > other: > https://www.mail-archive.com/re-wrenches@lists.re-wrenches.org/ > http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org > > List rules & etiquette: > http://www.re-wrenches.org/etiquette.htm > > Check out or update participant bios: > http://www.members.re-wrenches.org > >
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