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azonano.com: Carbon Nanotube Structures Could Provide More Efficient Solar Power for Soldiers  28 February 2005

http://www.tectosol.staticip.de/index_en.htm  electricity yield of a solar power system

http://www.sunny-portal.de Yield Portal for solar power system users

National Renewable Energy Laboratory (NREL): Photovoltaics for Buildings: PV Technology for the Home Factsheets

1993, National Renewable Energy Laboratory (NREL): Photovoltaics: Unlimited Electrical Energy From the Sun BrokenLink

Electrical models of solar cells

How to Build Your Own Solar Cell

DIY (Do It Yourself): Nanocrystalline Dye-Sensitized Solar Cell Kit Quote: "... sunlight-to-electrical energy conversion efficiency is between 1 and 0.5 %..."