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Reaction between solar panels and mounting frame

I'm assembling a large array of solar panels here in New Mexico. The panels themselves are built around an aluminum frame, which will be resting on a metal frame made of 2" angle. It's dry enough here that I haven't seen any corrosion between these metals previously, BUT the big issue I am going up against will be a State Electrical inspection, I'm thinking a rubber hose washer between the two metal surfaces with a zinc fastener between them, Any thoughts?

John Kloepper
Hobbyist - Alamogordo, NM USA
December 20, 2009

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