[RE-wrenches] used panel mount questions

[Exeltech]

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 <allan at positiveenergysolar.com> wrote:

From: Allan Sindelar <allan at positiveenergysolar.com>
Subject: Re: [RE-wrenches] used panel mount questions
To: "RE-wrenches" <re-wrenches at lists.re-wrenches.org>
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

        Allan at positiveenergysolar.com

          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

          

          

         

      
      

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