Gallery: 6 Amazing Sun-Powered Homes Competing in the 2012 Solar Decath...

Team Zaragoza's Casa Pi is the only circular house in this year's European Solar Decathlon. The sun powered cylindrical home is designed to generate two times more energy than it consumes while cutting water use by one half.

Designed by the Technical University of Denmark, the Plus Energy FOLD House is a versatile modular home that can be configured in a variety of different ways depending on how its site is laid out.

The Heliomet SunBloc House by the London Metropolitan University is designed to be placed on the rooftops of existing buildings, where it will supply electricity and hot water to its neighbors.

Students from Spain’s Basque University designed the Ekihouse – a solar-powered home wrapped in a steel mesh facade.


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