(Bloomberg) -- Move over shale. The sun is now the fastest growing source of U.S. electricity.
Solar power capacity in the U.S. has jumped 20-fold since 2008 as companies including Apple Inc. use it to reduce their carbon footprint. Rooftop panels are sprouting on homes from suburban New York to Phoenix, driven by suppliers such as SolarCity Corp. and NRG Energy Inc.
Giant farms of photovoltaic panels, including Warren Buffett’s Topaz array in California, are changing power flows in the electrical grid, challenging hydro and conventional generators and creating negative prices on sunny days. The surge comes after shale drilling opened new supplies of natural gas, contributing to the 47% drop in oil since June.
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