<div dir="auto">Kent<div dir="auto">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.</div><div dir="auto">Fun times</div></div><br><div class="gmail_quote"><div dir="ltr" class="gmail_attr">On Sun, Jul 16, 2023, 2:59 PM Kent via RE-wrenches <<a href="mailto:re-wrenches@lists.re-wrenches.org">re-wrenches@lists.re-wrenches.org</a>> wrote:<br></div><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">
<div>
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 href="https://drive.google.com/drive/folders/1nQhTqahEx4whmmWyy89tqaEEGvzkvEps?usp=sharing" target="_blank" rel="noreferrer">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>
</div>
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