Phys.org - 3/18/13

The U.S. installed panels capable of producing 3,313 megawatts of peak electricity, up from 1,887 megawatts in 2011, the report said. The panels installed last year will generate about the same amount of electricity over a year as a medium-sized coal plant, enough to power 400,000 U.S. homes.

Solar grew in large part because prices continued to fall. The average cost of a solar system dropped 27% last year. Also, financing programs flourished that allow homeowners to install solar on their roofs for little or no money down while paying less overall for electricity.
 

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