<div dir="auto">The encapsulant between the glass and the aluminum might be degraded by a surfactant. It’s probably a low risk if you use a gentle soap, but I heard that somewhere about 15 years ago so I thought I’d mention it. </div><div dir="auto"> <span style="background-color:rgba(0,0,0,0);border-color:rgb(0,0,0);color:rgb(0,0,0)">I also heard that pressure washers are too strong and can ruin the encapsulant seal. </span></div><div dir="auto"><br></div><div dir="auto"><br></div><div><br><div class="gmail_quote"><div dir="ltr" class="gmail_attr">On Mon, Oct 23, 2023 at 6:44 AM White, Will 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-width:1px;border-left-style:solid;padding-left:1ex;border-left-color:rgb(204,204,204)">
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<p class="MsoNormal">I worked with a guy who had done installs in Arizona. He had an off-grid customer spray down their array with cold well water in the middle of the day, which shattered the module glass.
<u></u><u></u></p>
<p class="MsoNormal"><u></u> <u></u></p>
<p class="MsoNormal">I’m sure it was an isolated incident, but it happened.<u></u><u></u></p>
<p class="MsoNormal"><u></u> <u></u></p>
<p class="MsoNormal">Thanks,<u></u><u></u></p>
<p class="MsoNormal">Will<u></u><u></u></p>
<p class="MsoNormal"><u></u> <u></u></p>
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<p class="MsoNormal"><b>From:</b> RE-wrenches <<a href="mailto:re-wrenches-bounces@lists.re-wrenches.org" target="_blank">re-wrenches-bounces@lists.re-wrenches.org</a>>
<b>On Behalf Of </b>Jason Szumlanski via RE-wrenches<br>
<b>Sent:</b> Friday, October 20, 2023 4:47 PM<br>
<b>To:</b> RE-wrenches <<a href="mailto:re-wrenches@lists.re-wrenches.org" target="_blank">re-wrenches@lists.re-wrenches.org</a>><br>
<b>Cc:</b> Jason Szumlanski <<a href="mailto:jason@floridasolardesigngroup.com" target="_blank">jason@floridasolardesigngroup.com</a>><br>
<b>Subject:</b> [EXTERNAL] Re: [RE-wrenches] Cleaning PV mods<u></u><u></u></p>
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<p class="MsoNormal"><u></u> <u></u></p>
<p><strong><span style="font-size:10pt;font-family:Calibri,sans-serif;background-color:rgb(255,212,128);color:rgb(204,51,0)">CAUTION:</span></strong><span style="font-size:10pt;background-color:rgb(255,212,128);color:black"> This email originated from outside of the organization. Do not
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<p> <u></u><u></u></p>
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<p class="MsoNormal">I don't understand the thermal shock nonsense. It routinely starts downpouring here when it's blazing hot out (sun showers) and the rain is way cooler than ground water in summer. It makes no sense. If hose water from the ground is going
to hurt solar panels, you better not put them where it rains! <u></u><u></u></p>
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<p class="MsoNormal"><u></u> <u></u></p>
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<p class="MsoNormal">I replied privately to Dana, but for the benefit of the group, it takes a heavy soiling to make any appreciable difference. I have done numerous tests at times of high pollen and found little to no benefit to cleaning solar panels. Certainly
it would not be worth paying someone to do it. Other climates may have different results. My suggestion would be to test first. Module level power electronics can provide incontrovertible proof.<u></u><u></u></p>
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<p class="MsoNormal"><u></u> <u></u></p>
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<p class="MsoNormal">Jason<u></u><u></u></p>
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<p class="MsoNormal"><u></u> <u></u></p>
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<p class="MsoNormal" style="margin-bottom:12pt"><u></u> <u></u></p>
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<p class="MsoNormal">On Fri, Oct 20, 2023, 4:21 PM Dave Tedeyan via RE-wrenches <<a href="mailto:re-wrenches@lists.re-wrenches.org" target="_blank">re-wrenches@lists.re-wrenches.org</a>> wrote:<u></u><u></u></p>
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<p class="MsoNormal">Hi Dana, <u></u><u></u></p>
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<p class="MsoNormal"><u></u> <u></u></p>
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<p class="MsoNormal">See attached from REC. I would imagine these guidelines would apply to all modules.<u></u><u></u></p>
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<p class="MsoNormal">Cheers,<u></u><u></u></p>
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<p class="MsoNormal">Dave<u></u><u></u></p>
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<p class="MsoNormal"><u></u> <u></u></p>
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<p class="MsoNormal">On Fri, Oct 20, 2023 at 3:56 PM Dana Orzel via RE-wrenches <<a href="mailto:re-wrenches@lists.re-wrenches.org" target="_blank">re-wrenches@lists.re-wrenches.org</a>> wrote:<u></u><u></u></p>
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<p class="MsoNormal"><span style="font-size:14pt;font-family:"Century Gothic",sans-serif">Hey ally ‘all,</span><u></u><u></u></p>
<p class="MsoNormal"><span style="font-size:14pt;font-family:"Century Gothic",sans-serif"> </span><u></u><u></u></p>
<p class="MsoNormal"><span style="font-size:14pt;font-family:"Century Gothic",sans-serif">Ok bad solar installer! 7 years & I have never cleaned my modules & live on a dirt road. Yeah rain does a
good job with the dust but there is a film mostly on the edges.</span><u></u><u></u></p>
<p class="MsoNormal"><span style="font-size:14pt;font-family:"Century Gothic",sans-serif"> </span><u></u><u></u></p>
<p class="MsoNormal"><span style="font-size:14pt;font-family:"Century Gothic",sans-serif">What does everyone do for cleaning?</span><u></u><u></u></p>
<p class="MsoNormal"><span style="font-size:14pt;font-family:"Century Gothic",sans-serif"> </span><u></u><u></u></p>
<p class="MsoNormal"><span style="font-size:14pt;font-family:"Century Gothic",sans-serif">My array is 16’+ tall on a hill side. I have a pressure washer & was going to pick up a large sponge type
mop & mount it on a painters extension pole. </span><u></u><u></u></p>
<p class="MsoNormal"><span style="font-size:14pt;font-family:"Century Gothic",sans-serif"> </span><u></u><u></u></p>
<p class="MsoNormal"><span style="font-size:14pt;font-family:"Century Gothic",sans-serif">Good Biodegradable cleaning solutions?</span><u></u><u></u></p>
<p class="MsoNormal"><span style="font-size:14pt;font-family:"Century Gothic",sans-serif"> </span><u></u><u></u></p>
<p class="MsoNormal"><span style="font-size:14pt;font-family:"Century Gothic",sans-serif"> </span><u></u><u></u></p>
<p class="MsoNormal"><span style="font-size:12pt;font-family:"Century Gothic",sans-serif">_________________________________________________________</span><u></u><u></u></p>
<p class="MsoNormal"><span style="font-size:12pt;font-family:"Century Gothic",sans-serif;color:rgb(56,86,35)">Dana Orzel GREAT SOLAR WORKS!
</span><u></u><u></u></p>
<p class="MsoNormal"><span style="font-size:12pt;font-family:"Century Gothic",sans-serif;color:rgb(56,86,35)">C – 208.721.7003 E –
<a href="mailto:dana@solarwork.com" target="_blank" style="font-family:"Century Gothic",sans-serif"><span style="text-decoration:none;font-family:"Century Gothic",sans-serif;color:rgb(56,86,35)">dana@solarwork.com</span></a></span><u></u><u></u></p>
<p class="MsoNormal"><span style="font-size:12pt;font-family:"Century Gothic",sans-serif;color:rgb(56,86,35)">W - www.
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<span style="text-decoration:none;font-family:"Century Gothic",sans-serif;color:rgb(56,86,35)">www.solarwork.com</span></a></span><u></u><u></u></p>
<p class="MsoNormal"><i><u><span style="font-size:12pt;font-family:"Century Gothic",sans-serif;color:rgb(56,86,35)">“Responsible Technologies for Responsible People since 1988!”</span></u></i><u></u><u></u></p>
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