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Solar power in California has been growing rapidly because of high insolation, community support, declining solar costs, and a Renewable Portfolio Standard which requires that 33% of California's electricity come from renewable resources by 2020, and 50% by 2030. Much of this is expected to come from solar power. In 2014, utility-scale solar power in California generated 9.9 million megawatt-hours, more than double the amount generated in 2013, and more than five percent of total utility-scale electrical generation in the state.〔(California becomes first state to generate more than 5 percent of electricity from utility-scale solar ), US EIA, March 2015.〕 As of the end of 2013, California had 490 MW of concentrated solar power and 5,183 MW of photovoltaics capacity in operation. The American Solar Energy Industries Association reports that a further 19,200 MW of utility-scale solar projects are under construction or development in the state as of August 2014. Over the last 20 years, California has been home to a number of "world's largest" solar facilities. In 1991, the 354-MW solar thermal SEGS plant (located in the Mojave Desert in San Bernardino County, California) held the title until being bested by the 392-MW Ivanpah Solar Electric Generating System, a concentrated solar thermal plant located in San Bernardino County near the Nevada border. In 2014, the 550-MWAC Topaz Solar Farm became the new "world's largest operational" solar facility went online in Riverside County, California. A second 550-MW facility by First Solar, Desert Sunlight, also went online in Riverside County in 2014. Both these were superseded, however, by the Solar Star photovoltaic project that went online with 279 MVAC in June 2015 in Antelope Valley, California (located on Los Angeles and Kern counties). While California hosts the three largest photovoltaic facilities in the world (as of July 2015), there are yet several proposals for even larger facilities seeking regulatory approval in California. California also leads the nation in the number of homes which have solar panels installed, totaling over 230,000. Many were installed because of the Million Solar Roof Initiative.〔(Million Solar Roofs Initiative )〕 ==Solar thermal power== (詳細はIvanpah Solar Electric Generating System (392 MW), located southwest of Las Vegas, is the world's largest solar thermal power project.〔 The project is developed by BrightSource Energy and Bechtel.〔 〕 The project has received a $1.375 billion loan guarantee from the United States Department of Energy. It deploys 347,000 heliostat mirrors focusing solar energy on boilers located on centralized solar power towers.〔Todd Woody. ( In California’s Mojave Desert, Solar-Thermal Projects Take Off ) ''Yale Environment 360'', 27 October 2010.〕 The Genesis Solar Energy Project is an operational 250 MW solar thermal power station located in Riverside County, California. It features a parabolic trough design and is run by NextEra Energy Resources.〔(Another Huge Solar Plant Goes Online in California's Desert ), Chris Clarke, REWIRE, May 5, 2014〕 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Solar power in California」の詳細全文を読む スポンサード リンク
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