* 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.
Citation formats
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 **** percent.
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U.S. Department of Energy. (February 1, 2020). Share of cumulative renewable energy installed in total generation capacity in the United States as of 2018, by ISO/RTO region* [Graph]. In ÌÇÐÄÆƽâ°æ. Retrieved July 20, 2026, from /statistics/1115906/renewable-energy-installed-capacity-share-total-generation-us-by-operator/
U.S. Department of Energy. "Share of cumulative renewable energy installed in total generation capacity in the United States as of 2018, by ISO/RTO region*." Chart. February 1, 2020. ÌÇÐÄÆƽâ°æ. Accessed July 20, 2026. /statistics/1115906/renewable-energy-installed-capacity-share-total-generation-us-by-operator/
U.S. Department of Energy. (2020). Share of cumulative renewable energy installed in total generation capacity in the United States as of 2018, by ISO/RTO region*. ÌÇÐÄÆƽâ°æ. ÌÇÐÄÆƽâ°æ Inc.. Accessed: July 20, 2026. /statistics/1115906/renewable-energy-installed-capacity-share-total-generation-us-by-operator/
U.S. Department of Energy. "Share of Cumulative Renewable Energy Installed in Total Generation Capacity in The United States as of 2018, by Iso/Rto Region*." ÌÇÐÄÆƽâ°æ, ÌÇÐÄÆƽâ°æ Inc., 1 Feb 2020, /statistics/1115906/renewable-energy-installed-capacity-share-total-generation-us-by-operator/
U.S. Department of Energy, Share of cumulative renewable energy installed in total generation capacity in the United States as of 2018, by ISO/RTO region* ÌÇÐÄÆƽâ°æ, /statistics/1115906/renewable-energy-installed-capacity-share-total-generation-us-by-operator/ (last visited July 20, 2026)
Share of cumulative renewable energy installed in total generation capacity in the United States as of 2018, by ISO/RTO region* [Graph], U.S. Department of Energy, February 1, 2020. [Online]. Available: /statistics/1115906/renewable-energy-installed-capacity-share-total-generation-us-by-operator/
