U.S. solar panel systems now exceed 2 million, could double by 2023 in projections

California was responsible for 51 percent of the first million installations and 43 percent of the second million


The U.S. is now home to more than 2 million solar installations, and that number is expected to double by 2023, according to Wood Mackenzie Power & Renewables and the Solar Energy Industries Association (SEIA).

Solar energy has boomed in the U.S. over the last decade thanks to rapidly falling prices on the technology, state mandates that require utilities to source large amounts of renewable energy and a federal tax credit worth 30 percent of the cost of a system.

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