Open Energy Info (OpenEI)

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Source:
United States Department of Energy

Sponsored by the U.S. Department of Energy and developed by the National Renewable Energy Laboratory, this website provides international energy-related data, resources, news, and incentive information. The site is built as a Wiki, allowing users to edit and add information on the following subjects: buildings, geothermal, smart grid, solar, utilities, wind, oil, and gas.