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

As of 2018, the Utah-based operator, Western Electricity Coordinating Council (WECC), accounted for the highest share of cumulative renewable energy installed capacity compared to its total generation capacity in the United States, at some 45.7 percent.

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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