U.S. share of renewable energy capacity in total generation by operator 2018

Share of cumulative renewable energy installed in total generation capacity in the United States as of 2018, by ISO/RTO region*

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Release date

February 2020


United States

Survey time period


Supplementary notes

* Independent system operators and regional transmission organizations, including:
CAISO: California Independent System Operator,
ERCOT: Electric Reliability Council of Texas,
FRCC: Florida Reliability Coordinating Council,
ISO-NE: ISO New England,
MISO: Midcontinent Independent System Operator,
NYISO: New York Independent System Operator,
PJM: PJM Interconnection,
SERC: SERC Reliability Corporation,
SPP: Southwest Power Pool,
WECC: Western Electricity Coordinating Council (WECC). WECC refers to non-CAISO WECC. Though it is reported separately, CAISO is formally part of WECC.

Includes utility-scale (greater than one megawatt) generation from hydropower, onshore and offshore wind, solar PV, concentrating solar power, biomass/municipal solid waste/landfill gas and biothermal.

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