The Timberline Solar Energy Shingle, developed and sold by GAF, the largest roofing and waterproofing company in North America, is the first commercially-available nailable solar shingle.
It can be installed just like any other roofing shingle, and has a comparable weatherproofing performance to GAF's other roofing shingles. The shingles are already certified under UL 7103 as both a roofing product and as a solar energy product. The solar technology is integrated into the roofing material (on the front side of the shingle to make it more accessible for servicing), resulting in a fully-fledged solar roof.
There does not appear to be much available in the way of specifications, efficiency or even cost yet, but if these are good, then this could be a real game-changer in solar energy. (The indications are that GAF's solar shingles maybe 50% cheaper than Tesla's.)
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