How about ENER, Energy Conversion Devices http://www.ovonics.com/ holds patents on thin flim solar cells and nickle metal hidride batteries. They have a joint venture that produces solar shingles http://www.uni-solar.com/ and another jv with CVX ("ChevronTexaco In addition to ChevronTexaco's 20% equity stake in ECD, we have established joint ventures for the continued development and commercialization of advanced energy technologies. Our joint ventures are in the areas of ECD's proprietary Ovonic Solid Hydrogen Storage Technology, the Ovonic Regenerative Fuel Cell, and Ovonic NiMH Battery Technology.") I follow this company and think it is worth a look.
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