California Independent System Operator

Balancing Authority Summary Information

California Independent System Operator is ranked #7 out of 65 balancing authorities in terms of total annual electricity generation.

Balancing Authority	California Independent System Operator
States	Arizona California Nevada
Last Update	Jun 2025
Annual Generation	190.4 TWh
Power Plants	1,943
Utilities	893
Ranked #7 out of 65 in terms of net annual generation
Ranked #7 out of 53 in terms of annual generation from natural gas
Power Plant Types	Natural Gas \| 44% Solar \| 24.9% Water \| 11.3% Wind \| 10.6% Nuclear \| 9.7%

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Daily Net Generation for California Independent System Operator for the past 3 Years

Plant Name	Utility	Location	Annual Generation	Plant Date	Last Update	Fuel Types
Springs Generating Station	City of Riverside - (CA)	Riverside, CA	11 GWh	Jun 2002	Dec 2023	Natural Gas
Spring Gap	Pacific Gas & Electric Co.	Long Barn, CA	31 GWh	Aug 1921	Dec 2023	Water
Spicer Meadow Project	Northern California Power Agny	Murphys, CA	30 GWh	Oct 1989	Dec 2023	Water
SPI Anderson 2	Sierra Pacific Industries	Anderson, CA	142 GWh	Jul 2015	Dec 2023	Wood/Wood Waste Solids : 99.8%
Spaulding 3	Pacific Gas & Electric Co.	Emigrant Gap, CA	18 GWh	Jan 1929	Dec 2023	Water
Spaulding 1	Pacific Gas & Electric Co.	Emigrant Gap, CA	37 GWh	Apr 1928	Dec 2023	Water
Southeast Resource Recovery	SERRF Joint Powers Authority	Long Beach, CA	90 GWh	Jun 1988	Mar 2024	Non-biogenic Municipal Solid Waste : 51.7% Biogenic Municipal Solid Waste : 42.3% Natural Gas : 6.1%
Southeast Kern River Cogen	Chevron USA Inc	Bakersfield, CA	58 GWh	Jan 1989	Mar 2025	Natural Gas
South Belridge Cogeneration Facility	AERA Energy LLC	McKittrick, CA	476 GWh	Nov 1985	Mar 2025	Natural Gas
South	Pacific Gas & Electric Co.	Manton, CA	18 GWh	Nov 1979	Dec 2023	Water
Soscol Ferry Solar	Soscol Ferry Solar	Napa, CA	4 GWh	Nov 2020	Dec 2023	Solar
Sonora 1	Greenbacker Renewable Energy Corporation	Jamestown, CA	3 GWh	Nov 2013	Dec 2023	Solar
Sonoma Central Landfill Phase II	County of Sonoma Dept of Trnsp	Petaluma, CA	7 GWh	May 1996	Dec 2023	Landfill Gas
Sonoma Central Landfill Phase I	County of Sonoma Dept of Trnsp	Petaluma, CA	8 GWh	Jun 1993	Dec 2023	Landfill Gas
Sonoma California Geothermal	Geysers Power Co LLC	Middletown, CA	432 GWh	Nov 1983	Dec 2023	Geothermal
Solverde 1	AES Distributed Energy	Lancaster, CA	201 GWh	Nov 2016	Mar 2025	Solar
Solar Star Palo Alto I, LLC	DG 1 Acquisition Co., LLC	Palo Alto, CA	2 GWh	Jul 2019	Dec 2023	Solar
Solar Star California, XLIV, LLC	MN8 Energy LLC	Pearblossom, CA	24 GWh	Nov 2016	Dec 2023	Solar
Solar Star California, XLI, LLC	MN8 Energy LLC	Rosamond, CA	152 GWh	Nov 2016	Mar 2025	Solar
Solar Star 2	Solar Star California XX, LLC	Rosamond, CA	728 GWh	Feb 2014	Mar 2025	Solar
Solar Star 1	Solar Star California XIX, LLC	Rosamond, CA	889 GWh	Feb 2014	Mar 2025	Solar
Solar Photovoltaic Project #42	Southern California Edison Co	Tulare, CA	7 GWh	Oct 2012	Dec 2023	Solar
Solar Oasis LLC	Solar Oasis, LLC	Palmdale, CA	51 GWh	Dec 2015	Dec 2023	Solar
Solar Gen 2 Solar Facility	Southern Power Co	Calipatria, CA	377 GWh	Oct 2014	Dec 2023	Solar
Solar Borrego I	NRG Solar Borrego I	Borrego Springs, CA	65 GWh	Jan 2013	Dec 2023	Solar
Solar Blythe LLC	NRG Solar Blythe	Blythe, CA	41 GWh	Nov 2009	Dec 2023	Solar
Solar Blythe 2	NRG Solar Blythe II LLC	Blythe, CA	41 GWh	Mar 2017	Dec 2023	Solar
Solar Blue	Westlands Solar Blue (OZ) Owner, LLC	Lemoore, CA	665 GWh	Nov 2023	Mar 2025	Solar : 95.8%
Solano Wind	Sacramento Municipal Util Dist	Rio Vista, CA	697 GWh	May 1994	Mar 2025	Wind
Solano County Cogen Plant	Solano County	Fairfield, CA	8 GWh	May 1989	Dec 2023	Natural Gas
Soboba Community Solar Project	Soboba Band of Luiseno Indians	San Jacinto, CA	3 GWh	Jul 2016	Dec 2023	Solar
Sly Creek	South Feather Water and Power Agency	Forbestown, CA	41 GWh	Jun 1983	Dec 2023	Water
Slate Hybrid	MN8 Energy LLC	Stratford, CA	703 GWh	Oct 2021	Mar 2025	Solar
Sky River Wind Energy Center	Sky River Wind LLC	Tehachapi, CA	202 GWh	Jan 1991	Dec 2023	Wind
SJ/SC WPCP	San Jose/Santa Clara Water P C	San Jose, CA	77 GWh	Jan 1953	Mar 2025	Other Biomass Gas : 50.0% Natural Gas : 49.9%
Site 980 65	Madera-Chowchilla Power Auth	Madera, CA	6 GWh	Jan 1985	Nov 2023	Water
Silver State Solar Power South	Silver State Solar Power South, LLC	Primm Valley, NV	644 GWh	Oct 2015	Mar 2025	Solar
Silicon Valley Clean Water	Silicon Valley Clean Water	Redwood City, CA	5 GWh	Feb 2015	Dec 2023	Other Biomass Gas : 95.6% Natural Gas : 4.4%
Signal Hill West Unit	Signal Hill Petroleum, Inc	Signal Hill, CA	38 GWh	Jun 2004	Mar 2025	Other Gas
Sierra Solar Greenworks	AES Distributed Energy	Lancaster, CA	34 GWh	Oct 2015	Dec 2023	Solar
Sierra Pacific Sonora	Sierra Pacific Industries	Standard, CA	34 GWh	Jan 2001	Dec 2023	Wood/Wood Waste Solids
Sierra Pacific Quincy Facility	Sierra Pacific Industries	Quincy, CA	171 GWh	Nov 1986	Dec 2023	Wood/Wood Waste Solids
Sierra Pacific Lincoln Facility	Sierra Pacific Industries	Lincoln, CA	88 GWh	Feb 2004	Dec 2023	Wood/Wood Waste Solids
Sierra Pacific Industries (2042-RD)	Sierra Pacific Industries	Red Bluff, CA	17 GWh	Apr 2020	Dec 2023	Solar
Sierra Pacific Chinese Camp	Sierra Pacific Industries	Chinese Camp, CA	5 GWh	Feb 2022	Dec 2023	Solar
Sierra Pacific Burney Facility	Sierra Pacific Industries	Burney, CA	94 GWh	Sep 1986	Dec 2023	Wood/Wood Waste Solids
Sierra Nevada Brewing Co Hybrid	Sierra Nevada Brewing Co	Chico, CA	9 GWh	Apr 2005	Dec 2023	Natural Gas : 75.4% Solar : 24.6%
Shiloh Wind Project 2 LLC	EDF Renewable Asset Holdings, Inc.	Birds Landing, CA	432 GWh	Dec 2008	Dec 2023	Wind
Shiloh IV Wind Project LLC	EDF Renewable Asset Holdings, Inc.	Birds Landing, CA	294 GWh	Nov 2012	Dec 2023	Wind
Shiloh III Wind Project LLC	EDF Renewable Asset Holdings, Inc.	Birds Landing, CA	276 GWh	Nov 2011	Dec 2023	Wind
Shiloh I Wind Project	Avangrid Renewables LLC	Rio Vista, CA	418 GWh	Apr 2006	Dec 2023	Wind
Shelter Creek Condominiums Solar	Vista Solar, Inc.	San Bruno, CA	3 GWh	Jan 2020	Dec 2023	Solar
Sheep Creek Community Solar Farm	Phelan Solar LLC	El Mirage, CA	2 GWh	Jul 2023	Dec 2023	Solar
Shasta Solar Farm	Ignite Solar Holdings LLC	Fall River Mills, CA	6 GWh	Feb 2014	Nov 2023	Solar
Shafter Solar LLC	Shafter Solar LLC	Bakersfield, CA	48 GWh	Apr 2015	Dec 2023	Solar
SFDK Solar	AES Distributed Energy	Vallejo, CA	10 GWh	Nov 2019	Dec 2023	Solar
SF Southeast Cogen Plant	City & County of San Francisco	San Francisco, CA	235 MWh	May 2002	Dec 2023	Other Biomass Gas
SEPV9 Power Plant	Duke Energy Renewables Services	Twentynine Palms, CA	24 GWh	May 2013	Dec 2023	Solar
SEPV Sierra	SEPV Sierra, LLC	Lancaster, CA	14 GWh	Mar 2020	Dec 2023	Electricity used for energy storage : 53.9% Solar : 46.1%
SEPV Palmdale East	AES Distributed Energy	Palmdale, CA	24 GWh	Jul 2015	Dec 2023	Solar
SEPV Mojave West	AES Distributed Energy	Mojave, CA	51 GWh	May 2016	Dec 2023	Solar
SEPV Cuyama Hybrid	SEPV Cuyama, LLC	New Cuyama, CA	107 MWh	Nov 2023	Dec 2023	Solar
SEPV 8	Duke Energy Renewables Services	Twentynine Palms, CA	33 GWh	May 2013	Dec 2023	Solar
SEPV 2	CVI CleanCapital Solar 1 LLC	Twentynine Palms, CA	4 GWh	May 2012	Dec 2023	Solar
SEPV 18	AES Distributed Energy	Palmdale, CA	5 GWh	Dec 2015	Dec 2023	Solar
SEPV 1	CVI CleanCapital Solar 1 LLC	Palmdale, CA	3 GWh	Apr 2012	Dec 2023	Solar
Sentinel Energy Center, LLC	Sentinel Energy Center LLC	Desert Hot Springs, CA	320 GWh	Apr 2013	Mar 2025	Natural Gas
SEGS IX	Terra-Gen Operating Co-Solar	Hinkley, CA	112 GWh	Aug 1990	Sep 2024	Solar
SeaWorld Aquatica	Onyx Asset Services Group	Chula Vista, CA	2 GWh	Apr 2018	Dec 2023	Solar
Sealed Air Madera Solar Project	Sealed Air Corporation	Madera, CA	6 GWh	Apr 2022	Dec 2023	Solar
SE Athos II, LLC	SE Athos II, LLC	Desert Center, CA	516 GWh	Nov 2021	Mar 2025	Solar
SDCWA - Twin Oaks	CleanCapital Holdings	San Marcos, CA	117 MWh	Apr 2011	Nov 2023	Solar
SDCCD - Miramar	CleanCapital Holdings	San Diego, CA	1 GWh	Jan 2011	Dec 2023	Solar
SCU000 El Camino Real Fuel Cell	2016 ESA Project Company, LLC	Santa Clara, CA	11 GWh	Nov 2018	Dec 2023	Natural Gas
SCE-Snowline-White Road (South)	SunEdison LLC	Phelan, CA	3 GWh	Oct 2014	Dec 2023	Solar
SCE-Snowline-White Road (North)	SunEdison LLC	Phelan, CA	3 GWh	Oct 2014	Dec 2023	Solar
SCE-Snowline-White Rd (Central)	SunEdison LLC	Phelan, CA	4 GWh	Oct 2014	Dec 2023	Solar
SCE-Snowline-Duncan Road (South)	SunEdison LLC	Phelan, CA	2 GWh	Sep 2014	Dec 2023	Solar
SCE-Snowline-Duncan Road (North)	SunEdison LLC	Phelan, CA	3 GWh	Sep 2014	Dec 2023	Solar
SCDA Solar 1	SCDA Solar 1, LLC	Sacramento, CA	12 GWh	Sep 2017	Dec 2023	Solar
SCCCD - Fresno Community College	Forefront Power, LLC	Fresno, CA	4 GWh	Sep 2018	Dec 2023	Solar
SCCCD - Clovis Community College	Forefront Power, LLC	Fresno, CA	2 GWh	Nov 2018	Dec 2023	Solar
SCC - San Jose	Bloom Energy	San Jose, CA	7 GWh	Feb 2014	Dec 2023	Natural Gas
Scarlet Solar (CA)	EDP Renewables North America LLC	Fresno, CA	365 GWh	-	Mar 2025	Solar
Scarlet II Hybrid	EDPR Scarlet II LLC	Cantua Creek, CA	81 GWh	-	Mar 2025	Solar
SC 1 Data Center, Phase 2	Xeres Ventures LLC	Santa Clara, CA	2 GWh	Aug 2011	Mar 2025	Distillate Fuel Oil
SB Water Reclamation Fuel Cell	San Bernardino Fuel Cell, LLC	San Bernardino, CA	9 GWh	May 2021	Dec 2023	Other Biomass Gas : 96.8% Natural Gas : 3.2%
Santa Rosa Junior College Petaluma Solar	Sonoma County Junior College District	Petaluma, CA	2 GWh	Jun 2018	Dec 2023	Solar
Santa Rita Jail Hybrid	County of Alameda GSA	Dublin, CA	13 GWh	Aug 2001	Dec 2023	Natural Gas : 80.9% Solar : 19.1%
Santa Rita Jail Fuel Cell	SRJFC, LLC	Dublin, CA	11 GWh	Nov 2016	Dec 2023	Natural Gas
Santa Fe Springs Rooftop Solar BLDG M	Golden Springs Development Company LLC	Santa Fe Springs, CA	2 GWh	Feb 2015	Nov 2023	Solar
Santa Fe Springs Rooftop Solar BLDG H	Golden Springs Development Company LLC	Santa Fe Springs, CA	2 GWh	Feb 2015	Dec 2023	Solar
Santa Cruz Energy	Santa Cruz Energy LLC	Santa Cruz, CA	10 GWh	Oct 2009	Dec 2023	Landfill Gas
Santa Clara Cogen	City of Santa Clara - (CA)	Santa Clara, CA	15 GWh	May 1982	Dec 2023	Natural Gas
Santa Ana 3	Southern California Edison Co	Highlands, CA	424 MWh	Aug 1999	Dec 2023	Water
Sandrini Solar 200	EDPR CA Solar Park LLC	Mettler, CA	75 GWh	-	Mar 2025	Solar
Sandrini Solar 100	EDPR CA Solar Park II LLC	Mettler, CA	92 GWh	-	Mar 2025	Solar
Sand Drag LLC	Avenal Solar Holdings LLC	Avenal, CA	33 GWh	Jul 2011	Dec 2023	Solar
Sand Bar Power Plant	Tri-Dam Power Authority	Stanislaus Ntl. Fores, CA	124 GWh	Apr 1986	Dec 2023	Water
San Pablo Raceway	AES Distributed Energy	Lancaster, CA	245 GWh	Jul 2019	Mar 2025	Solar

Surrounding Balancing Authorities

Rank	Balancing Authority	Annual Net Generation	# Power Plants
#26	Arizona Public Service Company	23.0 TWh	75
#55	Arlington Valley, LLC	3.4 TWh	1
#35	Balancing Authority of Northern California	15.1 TWh	83
#48	Imperial Irrigation District	5.9 TWh	65
#33	Los Angeles Department of Water and Power	17.7 TWh	120
#22	Nevada Power Company	38.2 TWh	136
#54	New Harquahala Generating Company, LLC	3.5 TWh	1
#18	Salt River Project Agricultural Improvement and Power District	58.7 TWh	45
#58	Turlock Irrigation District	2.1 TWh	11
#44	Western Area Power Administration - Desert Southwest Region	8.1 TWh	30

Balancing Authorities with Similar Net Generation

Rank	Balancing Authority	Annual Net Generation	# Power Plants
#3	Electric Reliability Council of Texas, Inc.	476.4 TWh	1,139
#5	Southwest Power Pool	297.0 TWh	762
#6	Southern Company Services, Inc. - Trans	252.0 TWh	393
#7	California Independent System Operator	190.4 TWh	1,943
#8	Tennessee Valley Authority	158.8 TWh	170
#10	Florida Power & Light Co.	148.6 TWh	159
#12	New York Independent System Operator	130.6 TWh	1,100
#13	Duke Energy Carolinas	111.4 TWh	556
#15	ISO New England	103.1 TWh	1,487
#16	Bonneville Power Administration	82.1 TWh	158