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

[Gary Willett]

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 <mailto:Gary at IcarusSolarServices.com>

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