<div dir="ltr">It was a bunch of years ago, but I had seen many of these "snail trails" on some modules. I actually took a curve tracer to them, and they functioned essentially the same as the other modules there that did not have the snail trails. Maybe these will be sources of premature failure in the future, but surprisingly, they were not affecting the module at the time.<div>Cheers,</div><div>Dave</div></div><br><div class="gmail_quote"><div dir="ltr" class="gmail_attr">On Mon, Jul 17, 2023 at 8:16 PM frenergy 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:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex">
<div>
<p>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...</p>
<p>Bill</p>
<pre cols="72">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</pre>
<p><br>
</p>
<p></p>
<div>On 7/16/2023 7:10 PM, Jerry Shafer via
RE-wrenches wrote:<br>
</div>
<blockquote type="cite">
<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" target="_blank">re-wrenches@lists.re-wrenches.org</a>>
wrote:<br>
</div>
<blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);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" rel="noreferrer" target="_blank">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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