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	Apr 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 \| 43.4% Solar \| 24.7% Water \| 11.7% Wind \| 11% 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
Castor Solar	ZGlobal Inc	Dustin Acres, CA	917 MWh	Mar 2016	Dec 2023	Solar
Eagle Creek	ZGlobal Inc	Taft, CA	8 GWh	Nov 2019	Dec 2023	Solar
Merced 1 PV	ZGlobal Inc	Los Banos, CA	7 GWh	Mar 2018	Dec 2023	Solar
Madera 1 PV	ZGlobal Inc	Madera, CA	3 GWh	Nov 2017	Dec 2023	Solar
Zero Waste Energy Development Co LLC	Zero Waste Energy Development Company LLC	San Jose, CA	2 GWh	Jan 2015	Dec 2023	Other Biomass Gas
Narrows PH	Yuba County Water Agency	Grass Valley, CA	73 GWh	Nov 1942	Dec 2023	Water
Narrows 2	Yuba County Water Agency	Browns Valley, CA	277 GWh	Nov 1969	Dec 2023	Water
Colgate	Yuba County Water Agency	Dobbins, CA	1 TWh	Sep 1969	Feb 2025	Water
Grassland 1&2 Solar Project	Yolo County of	Davis, CA	2 GWh	Jun 2013	Dec 2023	Solar
Grassland 3&4 Solar Project	Yolo County of	Davis, CA	2 GWh	Jun 2013	Nov 2023	Solar
Yolo County Solar Project	Yolo County of	Woodland, CA	534 MWh	Nov 2010	Dec 2023	Solar
Indian Valley Dam Hydro Project	Yolo County Flood Control WCD	Clearlake Oaks, CA	6 GWh	Sep 1983	Sep 2023	Water
MM Yolo Power	Yolo County Community Services Department	Woodland, CA	18 GWh	Sep 1990	Dec 2023	Landfill Gas
SC 1 Data Center, Phase 2	Xeres Ventures LLC	Santa Clara, CA	2 GWh	Aug 2011	Feb 2025	Distillate Fuel Oil
Wright Solar Park	Wright Solar Park LLC	Los Banos, CA	350 GWh	Nov 2019	Feb 2025	Solar
Wonderful Kings	Wonderful Renewable Energy, LLC.	Lost Hills, CA	3 GWh	Jul 2022	Dec 2023	Solar
Wonderful Orchards - Westside	Wonderful Renewable Energy, LLC.	Lost Hills, CA	12 GWh	Jul 2021	Dec 2023	Solar
Wonderful Firebaugh	Wonderful Renewable Energy, LLC.	Firebaugh, CA	10 GWh	Jul 2022	Dec 2023	Solar
Wonderful Nursery	Wonderful Renewable Energy, LLC.	Wasco, CA	5 GWh	Jun 2021	Dec 2023	Solar
POM Plant 2	Wonderful Renewable Energy, LLC.	Del Rey, CA	292 MWh	Nov 2021	Dec 2023	Solar
Wonderful Huller & Shellling	Wonderful Renewable Energy, LLC.	Lost Hills, CA	4 GWh	Jul 2021	Dec 2023	Solar
POM Juice Solar	Wonderful Renewable Energy, LLC.	Fresno, CA	352 MWh	Jun 2021	Dec 2023	Solar
Wonderful Orchards - New Columbia	Wonderful Renewable Energy, LLC.	Firebaugh, CA	9 GWh	Aug 2020	Dec 2023	Solar
Wonderful Orchards - Belridge	Wonderful Renewable Energy, LLC.	Lost Hills, CA	12 GWh	Nov 2020	Dec 2023	Solar
Wonderful Lost Hills	Wonderful Renewable Energy, LLC.	Lost Hills, CA	48 GWh	Aug 2021	Dec 2023	Solar
POM Beverage Solar	Wonderful Renewable Energy, LLC.	Del Rey, CA	4 GWh	Jun 2021	Dec 2023	Solar
POM Plant 1	Wonderful Renewable Energy, LLC.	Del Rey, CA	2 GWh	Nov 2021	Dec 2023	Solar
Waste Mangement Redwood LFGTE	WM Renewable Energy LLC	Novato, CA	6 GWh	Apr 2017	Dec 2023	Landfill Gas
Altamont Gas Recovery	WM Renewable Energy LLC	Livermore, CA	39 GWh	Feb 1969	Dec 2023	Landfill Gas
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
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
Victory Garden (Tehachapi)	Wind Stream Operations LLC	Tehachapi, CA	25 GWh	Nov 1981	Dec 2023	Wind
Willow Spring Solar, LLC	Willow Spring Solar LLC	Rosamond, CA	239 GWh	Dec 2018	Feb 2025	Solar
Whitney Point Solar	Whitney Point Solar, LLC	Five Points, CA	50 GWh	Feb 2017	Dec 2023	Solar
Whitethorn Solar LLC	Whitethorn Solar LLC	Livermore, CA	6 GWh	Jan 2016	Dec 2023	Solar
NextEra Westside PV	Westside Solar, LLC	Five Points, CA	48 GWh	Feb 2017	Dec 2023	Solar
Westside Solar Power PV1	Westside Assets LLC	Lemoore, CA	5 GWh	Apr 2016	Dec 2023	Solar
Westlands Solar PV Farm	Westlands Solar Farms, LLC	Huron, CA	38 GWh	Jan 2014	Dec 2023	Solar
Solar Blue	Westlands Solar Blue (OZ) Owner, LLC	Lemoore, CA	646 GWh	Nov 2023	Feb 2025	Solar : 95.7%
Almond	Westlands Almond LLC	Lemoore, CA	10 GWh	Aug 2023	Dec 2023	Solar
Western Power & Steam Inc	Western Power and Steam II LLC	Bakersfield, CA	23 GWh	Feb 1990	Jan 2025	Natural Gas
Pleasanton - Amador Valley High School	Westbound Solar LLC	Pleasanton, CA	2 GWh	Oct 2019	Dec 2022	Solar
West Ford Flat	West Ford Flat Energy Storage	Middletown, CA	1 GWh	-	Dec 2024	Electricity used for energy storage
Escondido Energy Center	Wellhead Services, Inc	Escondido, CA	23 GWh	Dec 2013	Dec 2023	Natural Gas
Panoche Peaker	Wellhead Services, Inc	Firebaugh, CA	2 GWh	Jul 1973	Dec 2023	Natural Gas
Yuba City Cogen Partners	Wellhead Services, Inc	Yuba City, CA	19 GWh	Nov 1990	Dec 2023	Natural Gas
Fresno Cogen Partners	Wellhead Services, Inc	San Joaquin, CA	3 GWh	Dec 1989	Dec 2023	Natural Gas
Delano Energy Center	Wellhead Services, Inc	Delano, CA	3 GWh	Dec 2012	Nov 2023	Natural Gas
Stanton Energy Reliability Center Hybrid	Wellhead Services, Inc	Stanton, CA	2 GWh	Jun 2020	Feb 2025	Natural Gas
Chula Vista Energy Center	Wellhead Services, Inc	Chula Vista, CA	2 GWh	Apr 2001	Dec 2023	Natural Gas
Fresno Solar	Wellhead Services, Inc	San Joaquin, CA	4 GWh	Sep 2015	Dec 2023	Solar
El Cajon Energy Center	Wellhead Services, Inc	El Cajon, CA	8 GWh	May 2010	Dec 2023	Natural Gas
Bear Mountain Limited	WCAC Operating Company	Bakersfield, CA	29 GWh	Mar 1995	Jan 2025	Natural Gas
High Sierra Limited	WCAC Operating Company	Bakersfield, CA	23 GWh	Feb 1989	Dec 2023	Natural Gas
Chalk Cliff Limited	WCAC Operating Company	Bakersfield, CA	11 GWh	Feb 1990	Dec 2024	Natural Gas
Live Oak Limited	WCAC Operating Company	Bakersfield, CA	12 GWh	Feb 1992	Feb 2025	Natural Gas
McKittrick Limited	WCAC Operating Company	Bakersfield, CA	10 GWh	Sep 1991	Jan 2025	Natural Gas
Double C Generation Limited Partnership	WCAC Operating Company	Bakersfield, CA	23 GWh	Feb 1989	Dec 2023	Natural Gas
Kern Front Limited	WCAC Operating Company	Bakersfield, CA	22 GWh	Jan 1989	Dec 2023	Natural Gas
Badger Creek Limited	WCAC Operating Company	Bakersfield, CA	13 GWh	Mar 1991	Feb 2025	Natural Gas
Watkins Manufacturing Co.	Watkins Manufacturing Corporation	San Diego, CA	6 GWh	Oct 2001	Feb 2025	Natural Gas
Walnut Creek Energy Park	Walnut Creek LLC	Industry, CA	221 GWh	Mar 2013	Feb 2025	Natural Gas
Wadham Energy LP	Wadham Energy Ltd Partners	Williams, CA	74 GWh	Feb 1989	Dec 2023	Agricultural By-Products : 99.5% Natural Gas : 0.5%
Shelter Creek Condominiums Solar	Vista Solar, Inc.	San Bruno, CA	3 GWh	Jan 2020	Dec 2023	Solar
Bio-Rad	Vista Solar, Inc.	Hercules, CA	3 GWh	Sep 2021	Dec 2023	Solar
Victory Pass	Victory Pass I, LLC	Desert Center, CA	555 GWh	-	Feb 2025	Solar
Victor Valley CC CPV Solar	Victor Valley Community College District	Victorville, CA	3 GWh	May 2010	Dec 2022	Solar
Ventura Solar	Ventura Solar LLC	Fillmore, CA	6 GWh	Aug 2021	Dec 2023	Solar
Venable Solar 2	Venable Solar, LLC	Blythe, CA	3 GWh	Mar 2015	Dec 2023	Solar
Venable Solar 1	Venable Solar, LLC	Blythe, CA	3 GWh	Mar 2015	Dec 2023	Solar
Vega Solar	Vega Solar, LLC	Los Banos, CA	48 GWh	Feb 2015	Dec 2023	Solar
Vasco Winds	Vasco Winds, LLC	Livermore, CA	216 GWh	Nov 2011	Dec 2023	Wind
9150 Hermosa Solar GM	Valta Energy	Rancho Cucamonga, CA	3 GWh	Nov 2022	Dec 2023	Solar
Valero Refinery Cogeneration Unit 1	Valero Refining Co California	Benicia, CA	171 GWh	Sep 2002	Feb 2025	Natural Gas : 96.3% Other Gas : 3.7%
Murphys	Utica Water & Power Authority	Murphys, CA	18 GWh	Feb 1954	Dec 2023	Water
Angels	Utica Water & Power Authority	Angels Camp, CA	7 GWh	Dec 1939	Dec 2023	Water
Energy Center	University of Redlands	Redlands, CA	5 GWh	Jan 2007	Dec 2023	Natural Gas
Parnassus Central Utility Plant	University of California-San Francisco	San Francisco, CA	69 GWh	Dec 1995	Feb 2025	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	221 GWh	Jun 2001	Feb 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	Feb 2025	Natural Gas
US Borax	U S Borax Inc	Boron, CA	267 GWh	Jun 1984	Feb 2025	Natural Gas
Frankenheimer Power Plant	Turlock Irrigation District	Oakdale, CA	3 GWh	Feb 1983	Oct 2023	Water
Luciana	Tulare Solar Center, LLC	Richgrove, CA	128 GWh	Mar 2022	Feb 2025	Solar
Trona Solar III	Trona Solar III LLC	Trona, CA	5 GWh	Mar 2023	Dec 2023	Solar
Sand Bar Power Plant	Tri-Dam Power Authority	Stanislaus Ntl. Fores, CA	124 GWh	Apr 1986	Dec 2023	Water
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
Torrance Refining Company, LLC	Torrance Refining Company, LLC	Torrance, CA	76 GWh	Aug 1983	Feb 2025	Other Gas : 81.7% Waste Heat : 18.3%
Cold Canyon 1	Toro Energy of California SLO	San Luis Obispo, CA	10 GWh	Jun 2013	Dec 2023	Landfill Gas
Topaz Solar Farm	Topaz Solar Farms LLC	Santa Margarita, CA	1 TWh	Mar 2013	Feb 2025	Solar
Titan Solar 1 (CA)	Titan Solar 1, LLC	Borrego Springs, CA	148 GWh	Nov 2020	Feb 2025	Solar
THUMS	THUMS Long Beach Company	Long Beach, CA	325 GWh	Dec 2002	Feb 2025	Natural Gas
University of the Pacific	The Greater Light USA LLC	Stockton, CA	6 GWh	Apr 2022	Dec 2023	Solar
Marathon Bay Area Cogen	Tesoro Marketing & Refining Co. LLC (Martinez)	Martinez, CA	699 GWh	Jan 1987	Feb 2025	Natural Gas
Lancaster Baptist Church	Tesla Inc.	Lancaster, CA	957 MWh	Nov 2011	Dec 2023	Solar
Monterey Regional Water Pollution Control Agency	Tesla Inc.	Marina, CA	1 GWh	Nov 2010	Dec 2023	Solar

Surrounding Balancing Authorities

Rank	Balancing Authority	Annual Net Generation	# Power Plants
#27	Arizona Public Service Company	22.6 TWh	75
#55	Arlington Valley, LLC	3.3 TWh	1
#36	Balancing Authority of Northern California	15.0 TWh	83
#48	Imperial Irrigation District	5.7 TWh	65
#33	Los Angeles Department of Water and Power	17.3 TWh	120
#22	Nevada Power Company	38.0 TWh	136
#54	New Harquahala Generating Company, LLC	3.6 TWh	1
#18	Salt River Project Agricultural Improvement and Power District	58.6 TWh	45
#58	Turlock Irrigation District	2.0 TWh	11
#41	Western Area Power Administration - Desert Southwest Region	8.4 TWh	30

Balancing Authorities with Similar Net Generation

Rank	Balancing Authority	Annual Net Generation	# Power Plants
#3	Electric Reliability Council of Texas, Inc.	474.6 TWh	1,139
#5	Southwest Power Pool	296.4 TWh	762
#6	Southern Company Services, Inc. - Trans	252.8 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	131.1 TWh	1,100
#13	Duke Energy Carolinas	111.3 TWh	556
#15	ISO New England	103.6 TWh	1,487
#16	Bonneville Power Administration	82.9 TWh	158