al128 -
Here's an article that is specific to solar roofing from the home power site :
Install a Solar-Electric Roof - Aug/Sep 2006
http://www.homepower.com/article/?file=HP114_pg16_Witte
Quote:
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PV shingles meet the needs of homeowners concerned about aesthetics and those in locations that otherwise restrict the installation of solar-electric modules, satellite dishes, and antennas. Another advantage is the money saved on conventional roofing materials, PV mounting frames, hardware and, of course, energy too.
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Unfortunately(?) it assumes you are using solar shingles.
CarloSW2