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

[Gary Willett]

It was brought to my attention that I had an error in my original post. 
Here's the corrected text:

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 GALVANIZED 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>

<mailto:Gary at IcarusSolarServices.com>

On 7/12/2011 5:23 PM, Gary Willett wrote:
> 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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