A Project of the National Energy Policy Institute 
Total U.S. photovoltaic system installations, 2011
There were over 61,000 individual photovoltaic systems installed in the U.S. in 2011, bringing the total number of operating systems in the U.S. to more than 214,000.
Source: SEIA 2011 Year-in-Review
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RECENT POSTS
- U.S. consumption, production and imports of petroleum and other liquid fuels, 1949-2011
- U. S. petroleum imports surpass production
- U.S. imports of petroleum and other liquid fuels as a percentage of consumption, 1949-2011
- U. S. imports of petroleum and other liquids
- U.S. primary energy use and real GDP, 1949-2011
- Growth in U. S. primary energy use and GDP
- U. S. sources of Mercury Emissions, 2008
- U. S. mercury emissions, 2008
- U. S. sources of NOx emissions, 2008
- U. S. nitrogen oxide emissions, 2008
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