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
Valero Refinery Cogeneration Unit 1	Valero Refining Co California	Benicia, CA	171 GWh	Sep 2002	Mar 2025	Natural Gas : 94.2% Other Gas : 5.8%
Valentine Solar, LLC	EDF Renewable Asset Holdings, Inc.	Rosamond, CA	292 GWh	Oct 2019	Mar 2025	Solar
Vacaville Hospital	KP Vacaville Solar, LLC	Vacaville, CA	3 GWh	Nov 2019	Dec 2023	Solar
Vaca Dixon Solar Station	Pacific Gas & Electric Co.	Vacaville, CA	4 GWh	Nov 2009	Dec 2023	Solar
USPS PV	Altus Power America Management, LLC	Los Angeles, CA	11 GWh	Jun 2017	Dec 2023	Solar
US-TOPCO (Soccer Center)	Tesla Inc.	Lancaster, CA	7 GWh	Nov 2016	Dec 2023	Solar
US Borax	U S Borax Inc	Boron, CA	271 GWh	Jun 1984	Mar 2025	Natural Gas
University of the Pacific	The Greater Light USA LLC	Stockton, CA	6 GWh	Apr 2022	Dec 2023	Solar
University of San Diego	Bloom Energy 2009 PPA	San Diego, CA	6 GWh	Nov 2016	Dec 2023	Natural 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%
University of California San Diego Hybrid	University of California San Diego	La Jolla, CA	220 GWh	Jun 2001	Mar 2025	Natural Gas
Univ of California San Diego Solar	University of California San Diego	La Jolla, CA	4 GWh	Nov 2008	Dec 2023	Solar
UCI Facilities Management Central Plant	University of California Irvine	Irvine, CA	112 GWh	Jun 2007	Mar 2025	Natural Gas
UC Riverside Lots 30 & 32	MN8 Energy LLC	Riverside, CA	7 GWh	Nov 2017	Dec 2023	Solar
UC Merced Solar Hybrid	MN8 Energy LLC	Merced, CA	8 GWh	Nov 2018	Dec 2023	Solar
UC Davis South Campus	Solar Star California XXXII, LLC	Davis, CA	23 GWh	Feb 2015	Dec 2023	Solar
Tulloch	Oakdale&South San Joaquin Irrigation D.	Jamestown, CA	125 GWh	May 1958	Dec 2023	Water
Tule Wind LLC	Avangrid Renewables LLC	Boulevard, CA	341 GWh	Nov 2017	Mar 2025	Wind
Tulare BioMAT Fuel Cell	Central CA Fuel Cell 2, LLC	Tulare, CA	12 GWh	Nov 2019	Dec 2023	Other Biomass Gas : 81.3% Natural Gas : 18.7%
Tulare 1 and 2	Arevon Energy, Inc.	Tulare, CA	636 MWh	Dec 2013	Dec 2023	Solar
Tropico Solar PV Plant	Arevon Energy, Inc.	Delano, CA	30 GWh	Aug 2016	Dec 2023	Solar
Trona Solar III	Trona Solar III LLC	Trona, CA	5 GWh	Mar 2023	Dec 2023	Solar
Transamerica Pyramid	Transamerica Pyramid Properties LLC	San Francisco, CA	525 MWh	Jun 2007	Dec 2023	Natural Gas
Tranquillity ID	Tranquillity Solar 1, LLC	Tranquillity, CA	3 GWh	Feb 2018	Dec 2023	Solar
Tracy Combined Cycle Power Plant	MRP San Joaquin Energy LLC.	Tracy, CA	964 GWh	Mar 2003	Mar 2025	Natural Gas
Tracy 210	Costco Wholesale	Tracy, CA	16 GWh	Feb 2019	Dec 2023	Natural Gas
TPC Windfarms LLC	Terra-Gen Operating Co-Wind	Mojave, CA	39 GWh	Nov 1986	Dec 2023	Wind
Toyota Long Beach Trigen	Long Beach Trigen, LLC	Long Beach, CA	5 GWh	Oct 2023	Dec 2023	Other Biomass Gas
Total Energy Facilities	Los Angeles County Sanitation	Carson, CA	169 GWh	Dec 1985	Dec 2023	Other Biomass Gas : 79.6% Natural Gas : 20.4%
Torrance Refining Company, LLC	Torrance Refining Company, LLC	Torrance, CA	75 GWh	Aug 1983	Mar 2025	Other Gas : 80.9% Waste Heat : 19.1%
Topaz Solar Farm	Topaz Solar Farms LLC	Santa Margarita, CA	1 TWh	Mar 2013	Mar 2025	Solar
Toadtown	Pacific Gas & Electric Co.	Magalia, CA	3 GWh	Mar 1986	Dec 2023	Water
TLR000 Hansen Fuel Cell	2016 ESA Project Company, LLC	Salinas, CA	8 GWh	Aug 2018	Dec 2023	Natural Gas
Titan Solar 1 (CA)	Titan Solar 1, LLC	Borrego Springs, CA	152 GWh	Nov 2020	Mar 2025	Solar
Tiger Creek	Pacific Gas & Electric Co.	Pioneer, CA	246 GWh	May 1931	Dec 2023	Water
THUMS	THUMS Long Beach Company	Long Beach, CA	299 GWh	Dec 2002	Mar 2025	Natural Gas
Three Forks Water Power Project	Grizzly Mountain Ranch	Zenia, CA	3 GWh	Nov 1984	Dec 2023	Water
Thermalito Diverson Dam	California Dept. of Water Resources	Oroville, CA	16 GWh	Jun 1987	Dec 2023	Water
Thermalito	California Dept. of Water Resources	Oroville, CA	340 GWh	Jan 1968	Mar 2025	Water
Terra-Gen VG Wind LLC	Terra-Gen Operating Co-Wind	Tehachapi, CA	5 GWh	Dec 1983	Dec 2023	Wind
Terra Francesco	Altus Power America Management, LLC	Ontario, CA	2 GWh	Feb 2015	Dec 2023	Solar
Terminus Hydroelectric Project	Eagle Creek Renewable Energy, LLC	Lemon Cove, CA	61 GWh	Feb 1990	Dec 2023	Water
Tequesquite Landfill Solar PV Project	Solar Star California XXXI, LLC	Riverside, CA	13 GWh	Sep 2015	Dec 2023	Solar
Temescal Canyon RV, LLC	Temescal Canyon RV, LLC	Corona, CA	2 GWh	Apr 2011	Dec 2023	Solar
Temescal	Metropolitan Water District of S CA	Corona, CA	7 GWh	Jun 1983	Dec 2023	Water
Teichert Materials-Teichert Vernalis	Foundation HA Energy Generation, LLC	San Joaquin, CA	2 GWh	Sep 2010	Dec 2023	Wind
Tehachapi Wind Resource II	CalWind Resources Inc	Tehachapi, CA	42 GWh	Dec 1996	Dec 2023	Wind
Tehachapi Wind Resource I	CalWind Resources Inc	Tehachapi, CA	13 GWh	Nov 1984	Dec 2023	Wind
Taylor Farms - Schilling Place	Bloom Energy	Salinas, CA	6 GWh	Jun 2019	Dec 2023	Natural Gas
Taylor Farms Salinas	Bloom Energy	Salinas, CA	8 GWh	Aug 2012	Dec 2023	Natural Gas
Taylor Farms	Foundation HA Energy Generation, LLC	Gonzales, CA	4 GWh	Oct 2014	Dec 2023	Wind
Target Woodland Solar Project	MN8 Energy LLC	Woodland, CA	3 GWh	Nov 2018	Dec 2023	Solar
Tajiguas Resource Recovery Project	MSB Investors, LLC	Goleta, CA	8 GWh	May 2022	Dec 2023	Other Biomass Gas
Tahquitz High School	AES Distributed Energy	Hemet, CA	2 GWh	Aug 2012	Dec 2023	Solar
Taft 26C Cogen	Chevron USA Inc	Taft, CA	52 GWh	Jun 1982	Mar 2025	Natural Gas
TA-High Desert LLC	TA-High Desert LLC	Lancaster, CA	45 GWh	Feb 2013	Dec 2023	Solar
TA-Acacia, LLC	Onward Energy	Lancaster, CA	53 GWh	Oct 2014	Dec 2023	Solar
Sycamore Energy LLC	Sycamore Energy LLC	Santee, CA	23 GWh	Mar 2004	Dec 2023	Landfill Gas
Sycamore Cogeneration	Sycamore Cogeneration Co	Bakersfield, CA	273 GWh	Nov 1987	Feb 2025	Natural Gas
Sunshine Valley Solar	EDP Renewables North America LLC	Armagosa, NV	268 GWh	Nov 2019	Mar 2025	Solar
Sunshine Gas Producers	Sunshine Gas Producers LLC	Sylmar, CA	120 GWh	Jul 2014	Mar 2025	Landfill Gas
Sunset Reservoir North Basin	Duke Energy Renewables Services	San Francisco, CA	6 GWh	Aug 2010	Dec 2023	Solar
Sunrise Power LLC	Sunrise Power Co LLC	Fellows, CA	2 TWh	May 2001	Jan 2025	Natural Gas
Sunray 3	Sunray Energy 3 LLC	Daggett, CA	33 GWh	Nov 1985	Dec 2023	Solar
Sunray 2	Sunray Energy 2, LLC	Daggett, CA	57 GWh	Nov 1984	Dec 2023	Solar
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%
Sunny Cow Solar, LLC	Sunny Cow Solar, LLC	Bakersfield, CA	847 MWh	Sep 2023	Dec 2023	Solar
SunEdison Walmart Apple Valley DC	SunE M5 Holdings LLC	Apple Valley, CA	969 MWh	Feb 2009	Dec 2023	Solar
SunEdison Walgreens Moreno Valley	SunE WG113 Moreno Valley LLC	Moreno Valley, CA	1 GWh	Aug 2007	Dec 2023	Solar
SunEdison Procter & Gamble Oxnard	SunE U6 Holdings LLC	Oxnard, CA	1 GWh	Sep 2009	Dec 2023	Solar
SunEdison Ironwood State Prison	SunE CPA CDC2 LLC	Blythe, CA	1 GWh	Apr 2008	Dec 2023	Solar
SunEdison Anheuser Busch Fairfield	SunE M5 Holdings LLC	Fairfield, CA	747 MWh	Nov 2008	Dec 2023	Solar
SunE- E Philadelphia Ontario	SunEdison LLC	Ontario, CA	1 GWh	Feb 2016	Dec 2023	Solar
SunAnza	Arizona Electric Pwr Coop Inc	Anza, CA	8 GWh	Aug 2017	Dec 2023	Solar
Sun Streams, LLC	EDP Renewables North America LLC	Arlington, AZ	410 GWh	Dec 2019	Mar 2025	Solar
Sun Streams 2	Sun Streams 2, LLC	Hassayampa, AZ	311 GWh	May 2021	Mar 2025	Solar
Sun Harvest Solar NDP1	Altus Power America Management, LLC	Dos Palos, CA	4 GWh	Apr 2015	Dec 2023	Solar
Sun City Project LLC	Avenal Solar Holdings LLC	Avenal, CA	34 GWh	Jul 2011	Dec 2023	Solar
Summit Winds	Greenbacker Renewable Energy Corporation	Livermore, CA	175 GWh	Jun 2021	Mar 2025	Wind
Summer Solar LLC	AES Distributed Energy	Lancaster, CA	41 GWh	Jun 2016	Dec 2023	Solar
Summer Solar D2	AES Distributed Energy	Lancaster, CA	2 GWh	Jun 2014	Dec 2023	Solar
Summer Solar C2	AES Distributed Energy	Lancaster, CA	2 GWh	May 2014	Dec 2023	Solar
Summer Solar B2	AES Distributed Energy	Lancaster, CA	3 GWh	May 2014	Dec 2023	Solar
Summer Solar A2	AES Distributed Energy	Lancaster, CA	3 GWh	May 2014	Dec 2023	Solar
Summer North Solar	AES Distributed Energy	Lancaster, CA	11 GWh	Nov 2014	Dec 2023	Solar
Stroud Solar Station	Pacific Gas & Electric Co.	Helm, CA	24 GWh	Aug 2011	Dec 2023	Solar
Strauss Wind Farm	Strauss Wind LLC	Lompoc, CA	233 GWh	Nov 2023	Mar 2025	Wind
Stony Gorge	City of Santa Clara - (CA)	Elk Creek, CA	13 GWh	Mar 1986	Dec 2023	Water
Stockton Biomass	DTE Stockton LLC	Stockton, CA	326 GWh	Nov 1987	Dec 2023	Wood/Wood Waste Solids : 99.6%
Still Water Power	Still Water Power LLC	Hanford, CA	634 MWh	Apr 2020	Dec 2023	Other Biomass Gas
Stenner Creek Solar	Stenner Creek Solar LLC	San Luis Obispo, CA	700 MWh	Apr 2018	Dec 2023	Solar
Stateline Solar	Southern Power Co	Nipton, CA	619 GWh	Nov 2015	Dec 2023	Solar
Starbucks - Evolution Fresh	Bloom Energy	Rancho Cucamonga, CA	4 GWh	May 2014	Dec 2023	Natural Gas
Staples La Mirada, CA	SunE WF3-ST Holdings, LLC	La Mirada, CA	2 GWh	Feb 2009	Dec 2023	Solar
Stanton Energy Reliability Center Hybrid	Wellhead Services, Inc	Stanton, CA	2 GWh	Jun 2020	Mar 2025	Natural Gas
Stanislaus	Pacific Gas & Electric Co.	Vallecito, CA	334 GWh	Feb 1963	Dec 2023	Water
Stanford Campus Solar	MN8 Energy LLC	Stanford, CA	6 GWh	Feb 2017	Dec 2023	Solar
Stage Gulch Solar	Stage Gulch Solar, LLC	Petaluma, CA	2 GWh	Mar 2018	Dec 2023	Solar
SRI International Cogen Project	IPT SRI Cogeneration Inc	Menlo Park, CA	24 GWh	Mar 1987	Mar 2025	Natural Gas
Springville Hydroelectric	Calleguas Mun Water District	Camarillo, CA	363 MWh	Feb 1994	Dec 2023	Water

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