Be careful with the silicon. Most of it is
hygroscopic, and contains acetic acid.
Automobile windshields are often secured with Butyl rubber caulk. It
is impervious to moisture. Might this be a good choice? I also wonder
if a polyurethane (like sikaflex) would be appropriate.
See Ya!
Marv
Enphase Energy
707 763-4784 x7016
Joel Davidson wrote:
William,
The main concerns are physical damage to the unsupported laminate and
moisture penetration at the exposed edge of the laminate. If the frame
can be pushed back in place without breaking the laminate, you can
fasten a flat bar across the back of the module to keep the frame in
place. EVA is hydroscopic and moisture will wick into the laminate from
the exposed edge. Run a bead of silicone caulk along the edge of the
laminate before securing the frame back in place.
Joel Davidson
----- Original Message ----- From: "William Korthof"
<wkort...@eesolar.com>
To: <re-wrenches@lists.re-wrenches.org>
Sent: Wednesday, June 24, 2009 1:39 PM
Subject: [RE-wrenches] module frame separation
Recently we've had a few modules (~5 year
old) exhibit frame separation from the glass...
in one case, it's minor separation of the long edge of frame on one or
both sides of a few modules... the frames seem okay and reasonably
secure when attached on the roof, but were loose during handling.
In another case, the customer is located in snow-impacted mountains.
Apparently, a sheet of icy snow pulled the bottom (short) edge of the
frame apart from the glass and side frame pieces. No damage to the
glass, but the lower edges of 6+ frames are now dangling by a thread.
I don't think the module warranties cover this problem---the power
output remains within spec and there is no evident damage to the
glass. But if we don't provide some sort of repair, the modules will
break.
Any suggestions for this kind of repair?
What kind of glue would we use to reattach the glass to the aluminum
frames?
Thanks,
William Korthof
Energy Efficiency Solar
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