[RE-wrenches] used panel mount questions

[Chris Mason]

Schletter makes those clamps.


On Thu, May 30, 2013 at 7:25 PM, Exeltech <exeltech at yahoo.com> wrote:

> I've seen rack "edge clamps" for frameless PV advertised, but didn't make a
> mental note of made by whom, or where I saw the ad.  I *do* recall the
> clamps
> were intended to be located along the long edges, not the ends.  Otherwise,
> expansion/contraction would stress/break the glass.
>
> There's a wealth of knowledge and know-how here.  Someone with the answer
> will chime in.
>
>
> Dan
>
> --- On *Thu, 5/30/13, toddcory at finestplanet.com <toddcory at finestplanet.com
> >* wrote:
>
>
> From: toddcory at finestplanet.com <toddcory at finestplanet.com>
>
> Subject: Re: [RE-wrenches] used panel mount questions
> To: "RE-wrenches" <re-wrenches at lists.re-wrenches.org>
> Date: Thursday, May 30, 2013, 6:06 PM
>
>
> good point dan... i wonder how frameless modules are intended to be
> mounted?
>
>
>
> todd
>
>
>
>
>
>
>
>
>
> On Thursday, May 30, 2013 4:00pm, "Exeltech" <exeltech at yahoo.com> said:
>
>   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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-- 
Chris Mason
President, Comet Systems Ltd
www.cometenergysystems.com
Cell: 264.235.5670
Skype: netconcepts
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