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	May 2025
Annual Generation	189.5 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 \| 43.6% Solar \| 24.8% Water \| 11.6% Wind \| 10.8% 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
Tracy 210	Costco Wholesale	Tracy, CA	16 GWh	Feb 2019	Dec 2023	Natural Gas
Foundation ST	Foundation HA Energy Generation, LLC	Tracy, CA	2 GWh	May 2011	Dec 2023	Wind
Tracy Combined Cycle Power Plant	MRP San Joaquin Energy LLC.	Tracy, CA	911 GWh	Mar 2003	Feb 2025	Natural Gas
Honda Torrance	Bloom Energy	Torrance, CA	762 MWh	Nov 2012	Dec 2023	Natural Gas
Torrance Refining Company, LLC	Torrance Refining Company, LLC	Torrance, CA	76 GWh	Aug 1983	Feb 2025	Other Gas : 81.7% Waste Heat : 18.3%
Mesquite Solar 1	Consolidated Edison Development Inc.	Tonopah, AZ	404 GWh	Oct 2011	Dec 2023	Solar
Mesquite Solar 2, LLC	Consolidated Edison Development Inc.	Tonopah, AZ	283 GWh	Nov 2016	Feb 2025	Solar
Mesquite Solar 3, LLC	Consolidated Edison Development Inc.	Tonopah, AZ	459 GWh	Nov 2016	Feb 2025	Solar
Mesquite Solar 4, LLC	Consolidated Edison Development Inc.	Tonopah, AZ	150 GWh	-	Feb 2025	Solar : 99.9%
Kaweah 2	Southern California Edison Co	Three Rivers, CA	693 MWh	Aug 1929	Dec 2023	Water
Vintner Solar	Ecos Energy LLC	Templeton, CA	4 GWh	Mar 2014	Dec 2023	Solar
Windstar 1	Nextera Energy Resources	Tehachapi, CA	192 GWh	Jan 2012	Dec 2023	Wind
Tehachapi Wind Resource I	CalWind Resources Inc	Tehachapi, CA	13 GWh	Nov 1984	Dec 2023	Wind
Terra-Gen VG Wind LLC	Terra-Gen Operating Co-Wind	Tehachapi, CA	5 GWh	Dec 1983	Dec 2023	Wind
Tehachapi Wind Resource II	CalWind Resources Inc	Tehachapi, CA	42 GWh	Dec 1996	Dec 2023	Wind
85 B	Wind Wall 1 LLC	Tehachapi, CA	87 GWh	Dec 1984	Dec 2023	Wind
85 A	Wind Wall 1 LLC	Tehachapi, CA	63 GWh	Dec 1984	Dec 2023	Wind
Coram Energy LLC (ECT)	Nextera Energy Resources	Tehachapi, CA	32 GWh	Apr 2005	Dec 2023	Wind
Coram Energy LLC	Nextera Energy Resources	Tehachapi, CA	36 GWh	Dec 2004	Dec 2023	Wind
Helzel & Schwarzhoff 86	Wind Stream Operations LLC	Tehachapi, CA	3 GWh	Nov 1986	Dec 2023	Wind
ZCO	Wind Stream Operations LLC	Tehachapi, CA	1 GWh	Nov 1985	Dec 2023	Wind
Coram Tehachapi	Nextera Energy Resources	Tehachapi, CA	4 GWh	Aug 1992	Dec 2023	Wind
Sky River Wind Energy Center	Sky River Wind LLC	Tehachapi, CA	202 GWh	Jan 1991	Dec 2023	Wind
Victory Garden (Tehachapi)	Wind Stream Operations LLC	Tehachapi, CA	25 GWh	Nov 1981	Dec 2023	Wind
Point Wind	Terra-Gen Operating Co-Wind	Tehachapi, CA	235 GWh	Feb 2021	Feb 2025	Wind
Cantua Solar Station	Pacific Gas & Electric Co.	TBD, CA	34 GWh	May 2012	Dec 2023	Solar
Giffen	Pacific Gas & Electric Co.	TBD, CA	13 GWh	May 2012	Dec 2023	Solar
Berry Cogen	Berry Petroleum Co	Taft, CA	14 GWh	Nov 1986	Feb 2025	Natural Gas
Algonquin SKIC20 Solar LLC	Algonquin Power Co	Taft, CA	45 GWh	Apr 2015	Dec 2023	Solar
Taft 26C Cogen	Chevron USA Inc	Taft, CA	55 GWh	Jun 1982	Feb 2025	Natural Gas
Maricopa West Solar PV, LLC	Onward Energy	Taft, CA	41 GWh	Nov 2015	Dec 2023	Solar
Algonquin SKIC 10 Solar, LLC	Algonquin Power Co	Taft, CA	18 GWh	Dec 2016	Dec 2023	Solar
Eagle Creek	ZGlobal Inc	Taft, CA	8 GWh	Nov 2019	Dec 2023	Solar
Sunshine Gas Producers	Sunshine Gas Producers LLC	Sylmar, CA	119 GWh	Jul 2014	Feb 2025	Landfill Gas
High Sierra Cogeneration Plant	Plumas Sierra Rural Electric Coop	Susanville, CA	36 GWh	Jan 2010	Dec 2023	Natural Gas
Sunnyvale City of WPCP	Sunnyvale City of WPCP	Sunnyvale, CA	10 GWh	Oct 1997	Dec 2023	Natural Gas : 40.7% Landfill Gas : 30.6% Other Biomass Gas : 28.7%
Yahoo! - HQ	Bloom Energy	Sunnyvale, CA	4 GWh	Jun 2014	Dec 2023	Natural Gas
Juniper Networks Sunnyvale	Bloom Energy	Sunnyvale, CA	6 GWh	Nov 2012	Dec 2023	Natural Gas
JSR000 N Mathilda Fuel Cell	2016 ESA Project Company, LLC	Sunnyvale, CA	9 GWh	May 2019	Dec 2023	Natural Gas
Equinix Caspian Dr. Fuel Cell	2016 ESA Project Company, LLC	Sunnyvale, CA	36 GWh	Nov 2017	Dec 2023	Natural Gas
Google Moffett Park Solar Project	Google, Inc.	Sunnyvale, CA	3 GWh	Feb 2021	Dec 2023	Solar
Goose Haven Energy Center	Goose Haven Energy Center	Suisun, CA	16 GWh	Dec 2002	Dec 2023	Natural Gas
Lambie Energy Center	Gilroy Energy Center LLC	Suisun, CA	14 GWh	Dec 2002	Dec 2023	Natural Gas
Creed Energy Center	Creed Energy Center LLC	Suisun, CA	8 GWh	Dec 2002	Dec 2023	Natural Gas
Potrero Hills Energy Producers	Potrero Hills Energy Producers, LLC	Suisun City, CA	59 GWh	Mar 2016	Dec 2023	Landfill Gas
Slate Hybrid	MN8 Energy LLC	Stratford, CA	682 GWh	Oct 2021	Feb 2025	Solar
Rock Creek	Pacific Gas & Electric Co.	Storrie, CA	617 GWh	Feb 1950	Feb 2025	Water
Poe	Pacific Gas & Electric Co.	Storrie, CA	591 GWh	Sep 1958	Oct 2024	Water
Bucks Creek	Pacific Gas & Electric Co.	Storrie, CA	85 GWh	Feb 1928	Sep 2023	Water
Cresta	Pacific Gas & Electric Co.	Storrie, CA	122 GWh	Oct 1949	Dec 2023	Water
Stockton Biomass	DTE Stockton LLC	Stockton, CA	326 GWh	Nov 1987	Dec 2023	Wood/Wood Waste Solids : 99.6%
Regional Wastewater Control Facility	City of Stockton MUD	Stockton, CA	4 GWh	Oct 2000	Dec 2023	Other Biomass Gas : 97.7% Natural Gas : 2.2%
University of the Pacific	The Greater Light USA LLC	Stockton, CA	6 GWh	Apr 2022	Dec 2023	Solar
Donaghy-Stockton	Donaghy Sales Inc.	Stockton, CA	2 GWh	Sep 2021	Dec 2023	Solar
Amazon - Stockton - Roof (SCK1) - (CA)	Forefront Power, LLC	Stockton, CA	4 GWh	Feb 2023	Dec 2023	Solar
Niagara Bottling Stockton	EnterSolar	Stockton, CA	2 GWh	Dec 2017	Dec 2023	Solar
Stanton Energy Reliability Center Hybrid	Wellhead Services, Inc	Stanton, CA	2 GWh	Jun 2020	Feb 2025	Natural Gas
Barre Peaker	Southern California Edison Co	Stanton, CA	22 GWh	Aug 2007	Nov 2023	Natural Gas
Sand Bar Power Plant	Tri-Dam Power Authority	Stanislaus Ntl. Fores, CA	124 GWh	Apr 1986	Dec 2023	Water
Stanford Campus Solar	MN8 Energy LLC	Stanford, CA	6 GWh	Feb 2017	Dec 2023	Solar
Sierra Pacific Sonora	Sierra Pacific Industries	Standard, CA	34 GWh	Jan 2001	Dec 2023	Wood/Wood Waste Solids
Rio Hondo	Metropolitan Water District of S CA	South Gate, CA	2 GWh	Feb 1984	Aug 2023	Water
Phoenix	Pacific Gas & Electric Co.	Sonora, CA	7 GWh	Jan 1940	Dec 2023	Water
City of Soledad Water Reclamation	Foundation HA Energy Generation, LLC	Soledad, CA	4 GWh	Oct 2014	Dec 2023	Wind
CA-DGS RFP-Salinas Valley State Prison	Forefront Power, LLC	Soledad, CA	1 GWh	Oct 2023	Dec 2023	Solar
Foundation Dole Fresh Vegetables	Foundation CA Fund X Manager LLC	Soledad, CA	18 GWh	Jul 2022	Dec 2023	Wind
Foundation SaIinas Valley State Prison	Foundation CA Fund IX Manager, LLC	Soledad, CA	5 GWh	Jul 2018	Dec 2023	Wind
Foundation California Training Facility	Foundation CA Fund IX Manager, LLC	Soledad, CA	6 GWh	Jul 2018	Dec 2023	Wind
Merced Falls	Merced Irrigation District	Snelling, CA	13 GWh	Jun 1930	Oct 2023	Water
Exchequer	Merced Irrigation District	Snelling, CA	251 GWh	Jun 1967	Dec 2023	Water
McSwain	Merced Irrigation District	Snelling, CA	46 GWh	Jun 1967	Oct 2023	Water
Parker	Merced Irrigation District	Snelling, CA	4 GWh	Mar 1982	Oct 2023	Water
Mitchell Solar, LLC	CD US Solar PO 3, LLC	Silver Lake, CA	3 GWh	Nov 2014	Dec 2023	Solar
Rudy Solar, LLC	CD US Solar PO 3, LLC	Silver Lake, CA	3 GWh	Nov 2014	Dec 2023	Solar
Madelyn Solar, LLC	CD US Solar PO 3, LLC	Silver Lake, CA	2 GWh	Nov 2014	Dec 2023	Solar
Signal Hill West Unit	Signal Hill Petroleum, Inc	Signal Hill, CA	38 GWh	Jun 2004	Feb 2025	Other Gas
Haypress	EIF Haypress LLC	Sierra City, CA	22 GWh	Nov 1988	Aug 2023	Water
Bear Creek	Central Rivers Power US, LLC	Shingletown, CA	6 GWh	Dec 1989	Dec 2023	Water
Deer Creek 2	Greenbacker Renewable Energy Corporation	Shingle Springs, CA	3 GWh	Nov 2021	Dec 2023	Solar
J S Eastwood	Southern California Edison Co	Shaver Lake, CA	8 GWh	Nov 1987	Feb 2025	Water
CA Flats Solar 150, LLC	Arevon Energy, Inc.	Shandon, CA	324 GWh	Jan 2019	Feb 2025	Solar
CA Flats Solar 130, LLC	California Flats Solar 130, LLC	Shandon, CA	232 GWh	Oct 2017	Feb 2025	Solar
Broadway 4 - Target Shafter	MN8 Energy LLC	Shafter, CA	3 GWh	Aug 2018	Dec 2023	Solar
Imperial Solar Energy Center West	CSOLAR IV West LLC	Seeley, CA	388 GWh	Mar 2016	Dec 2023	Solar
Humboldt Sawmill Company	Mendocino Forest Products	Scotia, CA	118 GWh	Dec 1937	Feb 2025	Wood/Wood Waste Solids : 99.7%
Sycamore Energy LLC	Sycamore Energy LLC	Santee, CA	23 GWh	Mar 2004	Dec 2023	Landfill Gas
Laguna Water Reclamation Facility	City of Santa Rosa	Santa Rosa, CA	14 GWh	Feb 2013	Dec 2023	Other Biomass Gas : 85.5% Natural Gas : 14.5%
Keysight - Santa Rosa	Bloom Energy	Santa Rosa, CA	34 GWh	Aug 2018	Dec 2023	Natural Gas
Topaz Solar Farm	Topaz Solar Farms LLC	Santa Margarita, CA	1 TWh	Mar 2013	Feb 2025	Solar
Golden Springs Building C-1	Golden Springs Development Company LLC	Santa Fe Springs, CA	2 GWh	Jan 2012	Dec 2023	Solar
Golden Springs Building D	Golden Springs Development Company LLC	Santa Fe Springs, CA	2 GWh	Feb 2012	Dec 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 Fe Springs Rooftop Solar BLDG M	Golden Springs Development Company LLC	Santa Fe Springs, CA	2 GWh	Feb 2015	Nov 2023	Solar
Building G	Golden Springs Development Company LLC	Santa Fe Springs, CA	2 GWh	Aug 2016	Dec 2023	Solar
Building F	Golden Springs Development Company LLC	Santa Fe Springs, CA	2 GWh	Oct 2016	Dec 2023	Solar
Buidling L	Golden Springs Development Company LLC	Santa Fe Springs, CA	899 MWh	Oct 2016	Dec 2023	Solar
Freeway Springs	Golden Springs Development Company LLC	Santa Fe Springs, CA	2 GWh	Sep 2016	Dec 2023	Solar
UC Santa Cruz Solar	Forefront Power, LLC	Santa Cruz, CA	3 GWh	Jun 2021	Dec 2022	Solar
Santa Cruz Energy	Santa Cruz Energy LLC	Santa Cruz, CA	10 GWh	Oct 2009	Dec 2023	Landfill Gas
University of California Santa Cruz	University of California Santa Cruz	Santa Cruz, CA	36 GWh	Aug 2013	Dec 2023	Natural Gas : 90.8% Solar : 9.2%

Surrounding Balancing Authorities

Rank	Balancing Authority	Annual Net Generation	# Power Plants
#27	Arizona Public Service Company	22.7 TWh	75
#55	Arlington Valley, LLC	3.3 TWh	1
#36	Balancing Authority of Northern California	15.0 TWh	83
#48	Imperial Irrigation District	5.8 TWh	65
#33	Los Angeles Department of Water and Power	17.4 TWh	120
#22	Nevada Power Company	38.1 TWh	136
#54	New Harquahala Generating Company, LLC	3.6 TWh	1
#18	Salt River Project Agricultural Improvement and Power District	58.5 TWh	45
#58	Turlock Irrigation District	2.1 TWh	11
#42	Western Area Power Administration - Desert Southwest Region	8.3 TWh	30

Balancing Authorities with Similar Net Generation

Rank	Balancing Authority	Annual Net Generation	# Power Plants
#3	Electric Reliability Council of Texas, Inc.	474.5 TWh	1,139
#5	Southwest Power Pool	296.3 TWh	762
#6	Southern Company Services, Inc. - Trans	252.3 TWh	393
#7	California Independent System Operator	189.5 TWh	1,943
#8	Tennessee Valley Authority	158.9 TWh	170
#10	Florida Power & Light Co.	148.5 TWh	159
#12	New York Independent System Operator	130.9 TWh	1,100
#13	Duke Energy Carolinas	111.3 TWh	556
#15	ISO New England	103.6 TWh	1,487
#16	Bonneville Power Administration	83.0 TWh	158