[RE-wrenches] Damaged PV module cells

[frenergy]

Not sure where this install is located but here in the Sierra, we had a 
near record snowfall and we saw a few failures, very few, but...

Bill

Feather River Solar Electric
Bill Battagin, Owner
4291 Nelson St.(shipping)
5575 Genesee Rd. (USPS, UPS)
Taylorsville, CA 95983
530.284.1925 Office/ 530.258.1641 Cell
CA Lic 874049
Solar powered since 1982


On 7/16/2023 7:10 PM, Jerry Shafer via RE-wrenches wrote:
> 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 at 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
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