<table cellspacing="0" cellpadding="0" border="0" ><tr><td valign="top" style="font: inherit;">I agree with Allen, and would like to add a related comment. Foam boards are<br>thermally insulative in nature. If affixed to the PV with adhesive, they would<br>cause the PV module to run hotter than if the backsheet was fully exposed<br>to the air.<br><br>This results in reduced energy output under all conditions, and increased<br>thermal stresses on the PV cells, internal buss, bonds, and other aspects<br>of the PV.<br><br><br>Dan<br><br><br>--- On <b>Thu, 5/30/13, Allan Sindelar <i><allan@positiveenergysolar.com></i></b> wrote:<br><blockquote style="border-left: 2px solid rgb(16, 16, 255); margin-left: 5px; padding-left: 5px;"><br>From: Allan Sindelar <allan@positiveenergysolar.com><br>Subject: Re: [RE-wrenches] used panel mount questions<br>To: "RE-wrenches" <re-wrenches@lists.re-wrenches.org><br>Date: Thursday, May 30, 2013,
5:46 PM<br><br><br><div id="yiv519615236">
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<div class="yiv519615236moz-cite-prefix">Todd,<br>
I don't have your answers, only the caution that "blue foam" to
many of us with a construction background means extruded
polystyrene or "blueboard", commonly used around foundations. It
deteriorates with exposure to sunlight, so could only be used in
an application such as this if protected from UV.<br>
Allan<br>
<br>
<div class="yiv519615236moz-signature">
<title></title>
<font face="Times New Roman, Times, serif"><b>Allan Sindelar</b></font><br>
<small><a rel="nofollow" ymailto="mailto:Allan@positiveenergysolar.com" target="_blank" href="/mc/compose?to=Allan@positiveenergysolar.com"><font color="#000099" face="Times New Roman, Times, serif"><u>Allan@positiveenergysolar.com</u></font></a></small><font face="Times New Roman, Times, serif"><br>
<span style="font-size:10pt;">NABCEP Certified Photovoltaic
Installer<br>
NABCEP Certified Technical Sales Professional<br>
New Mexico EE98J Journeyman Electrician<br>
Founder and Chief Technology Officer<br>
<b>Positive Energy, Inc.</b><br>
3209 Richards Lane (note new address)<br>
Santa Fe, New Mexico 87507<br>
<b>505 424-1112</b><br>
<a rel="nofollow" target="_blank" href="http://www.positiveenergysolar.com/"><u>www.positiveenergysolar.com</u></a></span></font>
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On 5/30/2013 4:14 PM, Todd Cory wrote:<br>
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<blockquote type="cite">
<font size="+1"><font face="Arial">wrenches,<br>
<br>
i have a customer who purchased 20 used astropower ap75
modules. they are frameless and appear to have been previously
mounted using four, 2" wide X 10" long strips of blue rigid
foam, glued to the back of each module with some kind of
adhesive.<br>
<br>
two questions:<br>
<br>
this seems to be a reasonable mounting system id like to
repeat. would anyone familiar with this kind of mounting
technique be willing to comment/speculate on an adhesive that
would not degrade the tedlar backsheet? whatever was
previously used worked great.<br>
<br>
what kind of flat/smooth mounting surface would folks suggest
the other side of the blue foam be attached to? the only thing
i can think of is plywood, but that would rot over time.<br>
<br>
thanks,<br>
<br>
todd<br>
<br>
<br>
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