[RE-wrenches] Damaged PV module cells

[Kent]

It took some time digging into internet images but I found a YouTube 
video of the same type of defect.
https://www.youtube.com/watch?v=U3a9AW24T_o
I can see that microcracks are the likely cause. The prevalence of 45 
degree angles seems weird though. Monocrystalline cells should have a 
random fracture direction.

Kent Osterberg
Blue Mountain Solar


On 7/16/2023 2:58 PM, Kent via RE-wrenches 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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