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See-Through Windows Make Clean Electricity From Raindrops
(cleantechnica.com)
This is a most excellent place for technology news and articles.
not if your getting it anyway. if the cost is worthwhile for the cooling and defrost qualities anyway and you get some energy for free then even a little is fine. Its like the old prius that had solar panels to help with ac but it would not power the car.
lol
Could be significant. The main reason I have to put on heat is to defrost and the rear window defrost is pants. then passive summer cooling could reduce ac quite a bit.