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It took some time digging into internet images but I found a YouTube
video of the same type of defect.<br>
<a moz-do-not-send="true" href="https://www.youtube.com/watch?v=U3a9AW24T_o" class="moz-txt-link-freetext">https://www.youtube.com/watch?v=U3a9AW24T_o</a><br>
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.<br>
<br>
Kent Osterberg<br>
Blue Mountain Solar
<p><br>
</p>
<div class="moz-cite-prefix">On 7/16/2023 2:58 PM, Kent via
RE-wrenches wrote:<br>
</div>
<blockquote type="cite" cite="mid:e74c10a9-8898-c2be-f7e9-cd24c7270d22@coveoregon.com">
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 <a moz-do-not-send="true" href="https://drive.google.com/drive/folders/1nQhTqahEx4whmmWyy89tqaEEGvzkvEps?usp=sharing">photos
of the cells online</a> 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.<br>
<br>
Kent Osterberg<br>
Blue Mountain Solar<br>
<br>
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