[RE-wrenches] Aluminum Module Frame To Galvanized Uni-Strut

[Jason Szumlanski]

I'm sorry to hijack this thread, but I just had a similar question about
metallurgic compatibility of S-5 clamps. Their brochure says that they
are completely compatible, and refers you to the website for details,
but I am unable to find any there. Any comments on how I can assure my
client would be appreciated.

Jason Szumlanski

Fafco Solar

 

From: re-wrenches-bounces at lists.re-wrenches.org
[mailto:re-wrenches-bounces at lists.re-wrenches.org] On Behalf Of Gary
Willett
Sent: Tuesday, July 12, 2011 6:24 PM
To: RE-wrenches at lists.re-wrenches.org
Subject: [RE-wrenches] Aluminum Module Frame To Galvanized Uni-Strut

 

Fellow Wrenches:

I am involved in the commissioning of a 300kw parking structure PV
system and have a concern about possible galvanic action between the
aluminum module frames and the stainless steel uni-strut.

The installation contractor attached the PV modules using a WEEB-like
stainless steel top-mounted clamp (to pierce the top of the PV frame). A
stainless steel bolt connects the clamp to the channel nut. The bottom
of the PV module is resting on the galvanized uni-strut.

Should there also be a WEEB-WMC assembly between the PV module and the
uni-strut?

Anyone have any experience where direct contact of these dissimilar
metals became an issue over time?

-- 



Regards,


Gary Willett, PE
Icarus Solar Services LLC
NABCEP Certified Solar PV Installer
Gary at IcarusSolarServices.com

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