I used one of these after cutting off the big end. The hole is sealed with butyl tape/caulk. [link] It's visible in the lower right, beneath the roof rack. Photo taken before installing the solar cables. [link]
Decided to go with two Ecoworthy 130W flexible panels sitting on polycarbonate [link] The panels are glued to the polycarbonate and the polycarbonate is glued to the roof along each edge and the front edge. Butyl tape provides fairing with holes at the 4 corners for drainage and breathing of the polycarbonate channels. ... more
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