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    <p>Drake,</p>
    <p>            I am no expert, BUT, about a year ago I covered an
      older not-in-service PV with a foot of snow on a 25 degree day and
      then hooked up a hose to a hot water faucet.  With a pistol grip
      sprayer I directed a solid stream of hot water at the PV.  It only
      took a second for that hot water to reach the PV's glass, no doubt
      cold from the snow.  I kept it there in one area for about 30
      seconds, slowly widening the area of 'impact', much of the snow
      melting of course.</p>
    <p>            Afterwards I carefully visually inspected the PV (it
      was an older Kyo) and could not find/see anything out of the
      ordinary, still tested to label specs (slight de-rating due to
      age) when placed in direct sun.</p>
    <p>            Another note, several times I have sprayed cool tap
      water (around 45 degrees, F) on my in-service array on my shop to
      eliminate the snow.  It's a 12:12 pitch but it still took a good
      15 minutes to clear it off. The array is 22, 60 cell PVs.  I have
      not any decrease in performance to date.</p>
    <p>            Conclusion?  None really, I can't imagine 'washing'
      snowy PVs off with cool water could do any harm.  Whereas the hot
      water test, intuitively probably not smart.</p>
    <p>Bill<br>
    </p>
    <pre class="moz-signature" cols="72">Feather River Solar Electric            
Bill Battagin, Owner
4291 Nelson St.
Taylorsville, CA 95983
530.284.7849
CA Lic 874049
<a class="moz-txt-link-abbreviated" href="http://www.frenergy.net">www.frenergy.net</a></pre>
    <div class="moz-cite-prefix">On 2/1/2017 11:13 AM, Drake wrote:<br>
    </div>
    <blockquote cite="mid:20170201191338.84F051009D@che.dreamhost.com"
      type="cite">
      Hi Wrenches,<br>
      <br>
      We have a lot of border line temperatures here that will not quit
      melt
      the snow off an array. We can lose production on a semi sunny, 28
      degree
      day. During such a day, I was looking at my frost free water
      faucet and
      my array. Humm, I could easily hose the snow off.<br>
      <br>
      Is there a reason not to do that? Any ice or slush would not
      present a
      problem. Is there a danger to the modules from doing that? <br>
      <br>
      Maybe this would even work on a sunny day when the temperatures
      were
      colder? Could a module break? Anyone ever try this?<br>
      <br>
      Thanks,<br>
      <br>
      Drake <br>
      <br>
      <a moz-do-not-send="true" name="_MailAutoSig"></a>Drake Chamberlin<br>
      <i>Athens Electric LLC<br>
        OH License 44810<br>
        CO License 3773<br>
        NABCEP Certified Solar PV <br>
        740-448-7328<br>
      </i><a moz-do-not-send="true" href="http://athens-electric.com/">http://athens-electric.com/<br>
        <br>
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    <pre class="moz-signature" cols="72">-- 
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