Hello,
Here's a really smart idea that I'm surprised that I have not heard about before:
http://features.csmonitor.com/environment/2009/04/28/in-israel-solar-power-that-wont-need-subsidies/
They cool the PV with water to make it more efficient, and they can also use the heat that is gathered. It's as obvious as the nose on your face!
There are metal roofs for houses that do similar things: they collect both PV and heat energy in the same roof (and you can collect rain water, too).
http://www.englertinc.com/Solar_info.aspx
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(It looks like the PV laminate is on the shed dormer.)
http://www.englertinc.com/ThinfilmSo...fo.aspx?Page=1
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