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<p>Dan,</p>
<p> I remember reading some REC material regarding
cleaning panels and they we very hesitant about anything brush or
sponge-like to clean their PVs, <tt>though I too, for my own
arrays have used a car-washing brush (very fine and soft) to
carefully remove scum. It seems it may be the only method for
getting off hard-core crud.</tt></p>
<p><tt>Bill</tt><br>
</p>
<div class="moz-cite-prefix">On 9/16/2021 1:08 PM, Dan Fink wrote:<br>
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<div dir="ltr">Bill; Similar situation in my area (CO) from the
big fire that went through here last fall. Some had enough
water onsite for the sprinkler trick, but the biggest issue
was thick coats of pink fire retardant from the slurry
bombers.</div>
<div dir="ltr">The only thing I could find that worked on both
the ash/mineral scum and the pink slurry was.....dish soap and
soft scrub brush. And LOTS of brushing, 3-4 times over all my
PV arrays. I was hesitant to try anything stronger, like
Simple Green, and tried to get info on that and other
chemicals from a couple PV module manufacturers, with no
success.</div>
<div dir="ltr">Good luck!<br clear="all">
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<div dir="ltr" class="gmail_attr">On Thu, Sep 16, 2021 at 1:49
PM Bill Battagin <<a href="mailto:frenergy@psln.com"
moz-do-not-send="true">frenergy@psln.com</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">Dearest wrenches,<br>
<br>
Trying to get back in the saddle here in the
Plumas Natl. <br>
Forest...We are just coming out of 7-8 weeks of threat of
fire from the <br>
Dixie fire in NE CA....has been life changing, three of our
communities <br>
were lost or severely impacted.<br>
<br>
But many of my customers did the old "sprinkler
on the <br>
roof" trick and left for evacuation so much ash and
(well)water on <br>
panels for weeks at a time. Depending on a variety of
factors some <br>
folks have not been able to see the PVs clean up with a
simple water <br>
spray and I've been very hesitant to recommend anything like
soap, soft <br>
brushing etc. Will the eventual several inches of rain
remove ash and <br>
minerals left from well water?, its pretty backed on.<br>
<br>
I'm looking for proven suggestions and/or
experiences. No <br>
structure loss here but fire took part of our
trees/property. Of course <br>
some of the system arrays are easy access and some are on
two story roofs.<br>
<br>
Thanks,<br>
<br>
Bill<br>
<br>
Feather River Solar Electric<br>
<br>
Taylorsville, CA<br>
<br>
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