I agree with Allen, and would like to add a related comment. Foam boards are thermally insulative in nature. If affixed to the PV with adhesive, they would cause the PV module to run hotter than if the backsheet was fully exposed to the air.
This results in reduced energy output under all conditions, and increased thermal stresses on the PV cells, internal buss, bonds, and other aspects of the PV. Dan --- On Thu, 5/30/13, Allan Sindelar <[email protected]> wrote: From: Allan Sindelar <[email protected]> Subject: Re: [RE-wrenches] used panel mount questions To: "RE-wrenches" <[email protected]> Date: Thursday, May 30, 2013, 5:46 PM Todd, 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. Allan Allan Sindelar [email protected] NABCEP Certified Photovoltaic Installer NABCEP Certified Technical Sales Professional New Mexico EE98J Journeyman Electrician Founder and Chief Technology Officer Positive Energy, Inc. 3209 Richards Lane (note new address) Santa Fe, New Mexico 87507 505 424-1112 www.positiveenergysolar.com On 5/30/2013 4:14 PM, Todd Cory wrote: wrenches, 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. two questions: 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. 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. thanks, todd _______________________________________________ List sponsored by Home Power magazine List Address: [email protected] Change email address & settings: http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org List-Archive: http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org List rules & etiquette: www.re-wrenches.org/etiquette.htm Check out participant bios: www.members.re-wrenches.org -----Inline Attachment Follows----- _______________________________________________ List sponsored by Home Power magazine List Address: [email protected] Change email address & settings: http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org List-Archive: http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org List rules & etiquette: www.re-wrenches.org/etiquette.htm Check out participant bios: www.members.re-wrenches.org
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