Energy in California

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California's peak electricity demand occurred on July 24, 2006, at 2:44 pm, 50,270 Megawatts. Since then measures to reduce peak load have resulted in decreased peak demand. In 2011, the peak load was 45,545 MW, on September 7.[1] By 2020 California is required to obtain at least 33% of electricity from renewable sources other than large hydro.[2] The legislature is considering new regulations in 2013 which would compel utilities to invest in energy storage technology, the first such legislation in the United States.[3]

In-State Electricity Source Percentages[4]
Year Wind Solar Small hydro Geothermal Biomass Large hydro Coal Nuclear Natural gas
2011 3.8% 0.53% 3.1% 6.3% 2.9% 18.3% 1.6% 18.3% 45.3%
2012 4.6% 0.9% 2.1% 6.4% 3.0% 11.7% 0.8% 9.3% 61.1%
2013 6.35% 2.15% 1.67% 6.25% 3.21% 10.39% 0.51% 8.94% 60.5%

29.7% of electricity was imported, and of that, 38.7% was of unspecified origin.

Total Electricity Source Percentages[4]
Year Wind Solar Small hydro Geothermal Biomass Large hydro Coal Nuclear Natural gas Unspecified Renewables
2011 5.1% 0.43% 2.2% 4.7% 2.2% 13.4% 8.4% 15.7% 36.5% 11.5% 14.5%
2012 6.3% 0.9% 1.5% 4.4% 2.3% 8.3% 7.5% 9.0% 43.4% 16.4% 15.4%
2013 8.55% 1.82% 1.29% 4.45% 2.67% 7.76% 7.82% 8.84% 44.31% 12.49% 18.77%

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