California Independent System Operator

Balancing Authority Summary Information

California Independent System Operator is ranked #7 out of 64 balancing authorities in terms of total annual electricity generation.

Balancing Authority	California Independent System Operator
States	Arizona California Nevada New Mexico
Last Update	Jul 2026
Annual Generation	169.4 TWh
Power Plants	2,135
Utilities	988
Ranked #7 out of 64 in terms of net annual generation
Ranked #12 out of 53 in terms of annual generation from natural gas
Power Plant Types	Natural Gas \| 34% Solar \| 30% Water \| 12.4% Wind \| 11.3% Nuclear \| 11%

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

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Plant Name	Utility	Location	Annual Generation	Plant Date	Last Update	Fuel Types
Guernsey Solar Station	Pacific Gas & Electric Co.	Hanford, CA	22 GWh	Jul 2013	Dec 2025	Solar
Guadalupe Solar Farm	County of Santa Clara - (CA)	San Jose, CA	1 GWh	Aug 2018	Dec 2025	Solar
Grossmont HS Solar Project	MN8 Energy LLC	El Cajon, CA	2 GWh	Nov 2018	Dec 2025	Solar
Grossmont Hospital	Sharp Grossmont Hospital	La Mesa, CA	29 GWh	Jul 1983	Dec 2025	Natural Gas
Grossmont-Cuyamaca-Cuyamaca Col. Solar &	Forefront Power, LLC	El Cajon, CA	3 GWh	Feb 2024	Dec 2024	Solar
Grossmont College	Forefront Power, LLC	El Cajon, CA	4 GWh	Feb 2023	Dec 2024	Solar
Grizzly	City of Santa Clara - (CA)	N/A, CA	43 GWh	Oct 1993	Dec 2025	Water
Gridley Main Two	Altus Power America Management, LLC	Gridley, CA	4 GWh	Mar 2013	Dec 2025	Solar
Gridley Main	Altus Power America Management, LLC	Gridley, CA	1 GWh	Feb 2013	Dec 2025	Solar
GreenStruxure BBU004, LLC	ClearGen LLC	Montebello, CA	2 GWh	Nov 2023	Dec 2025	Solar
Greenleaf 2 Power Plant	Greenleaf Energy LLC	Yuba City, CA	64 GWh	Sep 1989	May 2026	Natural Gas
Greenleaf 1	Calpine Greenleaf Holding, Inc.	Yuba City, CA	3 GWh	Jan 1989	Dec 2025	Natural Gas
Green Beanworks D PV	AES Distributed Energy	Palmdale, CA	6 GWh	Jul 2018	Dec 2025	Solar
Green Beanworks C PV	AES Distributed Energy	Palmdale, CA	8 GWh	Jul 2018	Dec 2025	Solar
Green Beanworks B PV	AES Distributed Energy	Lancaster, CA	6 GWh	Nov 2018	Dec 2025	Solar
Great Valley Solar Portfolio Holdings, L	RWE Clean Energy	Cantua Creek, CA	491 GWh	Nov 2017	May 2026	Solar
Grapeland Hybrid	Southern California Edison Co	Rancho Cucamonga, CA	2 GWh	Aug 2007	Dec 2025	Natural Gas
Graniterock Quarry	CalCom Energy	Aromas, CA	9 GWh	Aug 2022	Dec 2025	Solar
Government Plaza Solar	SoCore Energy LLC	Visalia, CA	2 GWh	Oct 2020	Dec 2025	Solar
Gosselin Hydro Plant	Humboldt Bay Mun Water Dist	Ruth, CA	5 GWh	May 1983	Dec 2025	Water
Goose Haven Energy Center	Goose Haven Energy Center	Suisun, CA	4 GWh	Dec 2002	Dec 2025	Natural Gas
Google Moffett Park Solar Project	Google, Inc.	Sunnyvale, CA	3 GWh	Feb 2021	Dec 2025	Solar
Google Bayhill Solar PV and Microgrid	Google, Inc.	San Bruno, CA	651 MWh	Mar 2024	Dec 2025	Solar
Golden Springs Building D	Golden Springs Development Company LLC	Santa Fe Springs, CA	2 GWh	Feb 2012	Dec 2025	Solar
Golden Springs Building C-1	Golden Springs Development Company LLC	Santa Fe Springs, CA	1 GWh	Jan 2012	Dec 2025	Solar
Golden Hills Wind	Golden Hills Wind, LLC	Livermore, CA	253 GWh	Nov 2015	Dec 2025	Wind
Golden Hills North Wind Energy Center	Golden Hills Interconnection Wind, LLC	Livermore, CA	130 GWh	Oct 2017	May 2026	Wind
Golden Fields Solar I, LLC	MN8 Energy LLC	Rosamond, CA	140 GWh	Nov 2016	May 2026	Solar
Golden Field Solar III, LLC	Golden Fields Solar III, LLC	Rosamond, CA	538 GWh	Nov 2020	May 2026	Solar : 99.4%
Golden Acorn Casino	Foundation HA Energy Generation, LLC	Campo, CA	4 GWh	Jun 2014	May 2026	Wind
Goal Line LP	Goal Line LP	Escondido, CA	12 GWh	Jul 1994	May 2026	Natural Gas
Glenarm	City of Pasadena - (CA)	Pasadena, CA	130 GWh	Dec 1975	Dec 2025	Natural Gas
Glass House Camarillo Cultivation	Glass House Camarillo Cultivation	Camarillo, CA	64 GWh	Jul 2012	Dec 2025	Natural Gas
Gilroy Power Plant	Calpine Gilroy Cogen LP	Gilroy, CA	21 GWh	Sep 1987	Dec 2025	Natural Gas
Gilroy Peaking Energy Center	Calpine Gilroy Cogen LP	Gilroy, CA	31 GWh	Oct 2001	Dec 2025	Natural Gas
Gilead Sciences La Verne Rooftop Solar	Gilead Sciences, Inc. - La Verne	La Verne, CA	2 GWh	Jun 2021	Dec 2025	Solar
Gilead Oceanside Solar Project	Gilead Sciences Inc.	Oceanside, CA	952 MWh	Nov 2021	Dec 2025	Solar
Gilead Foster City Solar Project	Gilead Sciences Inc. Foster City	Foster City, CA	2 GWh	Mar 2021	Dec 2024	Solar
Giffen Solar Park	Giffen Solar Park, LLC	Cantua Creek, CA	20 GWh	May 2017	Dec 2025	Solar
Giffen	Pacific Gas & Electric Co.	TBD, CA	12 GWh	May 2012	Dec 2025	Solar
Gianera	City of Santa Clara - (CA)	Santa Clara, CA	15 GWh	May 1986	Dec 2025	Natural Gas
Geysers Unit 5-20	Geysers Power Co LLC	Middletown, CA	4 TWh	Mar 1971	May 2026	Geothermal
Geothermal 2	Northern California Power Agny	Middletown, CA	363 GWh	Nov 1985	Apr 2026	Geothermal
Geothermal 1	Northern California Power Agny	Middletown, CA	308 GWh	Dec 1982	May 2026	Geothermal
Genesis Solar Energy Project	Genesis Solar LLC	Blythe, CA	600 GWh	Oct 2013	May 2026	Solar
Genentech Vacaville Meter #1	Tesla Inc.	Vacaville, CA	12 GWh	Apr 2017	Dec 2025	Solar
Genentech-Oceanside Hybrid	Tesla Inc.	Oceanside, CA	4 GWh	Mar 2016	Dec 2024	Solar
GEN005 Antibody Fuel Cell	2016 ESA Project Company, LLC	Oceanside, CA	19 GWh	Mar 2019	Dec 2025	Natural Gas
Gateway Generating Station	Pacific Gas & Electric Co.	Antioch, CA	3 TWh	Dec 2008	May 2026	Natural Gas
Gates Solar Station	Pacific Gas & Electric Co.	Huron, CA	31 GWh	May 2013	Dec 2025	Solar
Gaskell West 1 Solar Facility	Southern Power Co	Lancaster, CA	56 GWh	Feb 2018	Dec 2025	Solar
Gas Utilization Facility	City of San Diego - (CA)	San Diego, CA	29 GWh	May 1985	May 2026	Other Biomass Gas
Garnet Wind Energy Center	Terra-Gen Operating Co-Wind	North Palm Springs, CA	17 GWh	May 2009	Dec 2025	Wind
Garnet Solar Generation Station I LLC	Garnet Solar Generation Station I LLC	Palm Springs, CA	9 GWh	Nov 2014	Dec 2024	Solar
Gap Pacific Distribution Center	MN8 Energy LLC	Fresno, CA	5 GWh	Sep 2008	Dec 2025	Solar
G2 Energy Ostrom Road LLC	G2 Energy LLC	Wheatland, CA	28 GWh	Jan 2009	Dec 2025	Landfill Gas
G2 Energy Hay Rd	G2 Energy LLC	Vacaville, CA	13 GWh	May 2013	Dec 2025	Landfill Gas
FTF-PackingShed	Family Tree Farms	Reedley, CA	748 MWh	May 2013	Dec 2025	Solar
FRV SI Transport Solar LP	FRV SI Transport Solar, L.P. (Sacremento)	Sacramento, CA	1 GWh	Jul 2010	Dec 2025	Solar
Frontier Solar LLC	Boralex US Operations LLC	Newman, CA	48 GWh	May 2016	Dec 2025	Solar
Frontier HS Solar Project	MN8 Energy LLC	Bakersfield, CA	2 GWh	Nov 2018	Mar 2025	Solar
Friant Hydro Facility	Friant Power Authority	Friant, CA	73 GWh	Mar 1985	Dec 2025	Water
Fresno Sunnyside High School Hybrid	Forefront Power, LLC	Fresno, CA	3 GWh	Nov 2020	Dec 2024	Solar
Fresno Solar	Wellhead Services, Inc	San Joaquin, CA	5 GWh	Sep 2015	Aug 2025	Solar
Fresno Hoover High School Hybrid	Forefront Power, LLC	Fresno, CA	2 GWh	Feb 2020	Dec 2024	Solar
Fresno Community Solar	Agilitas Energy, Inc.	Fresno, CA	17 GWh	May 2024	Dec 2025	Solar
Fresno Cogen Partners	Wellhead Services, Inc	San Joaquin, CA	840 MWh	Dec 1989	Dec 2025	Natural Gas
Fresno Bullard High School Hybrid	Forefront Power, LLC	Fresno, CA	2 GWh	Feb 2020	Dec 2024	Solar
French Meadows	Placer County Water Agency - (CA)	Foresthill, CA	51 GWh	Sep 1966	Dec 2024	Water
Fremont - Kato Rd	Tesla Inc.	Fremont, CA	2 GWh	Nov 2016	Dec 2025	Solar
Fremont CA AutoFactory	Tesla Inc.	Fremont, CA	524 MWh	Feb 2022	Dec 2025	Solar
Freeway Springs	Golden Springs Development Company LLC	Santa Fe Springs, CA	3 GWh	Sep 2016	Dec 2025	Solar
Franklin Templeton San Mateo	Bloom Energy	San Mateo, CA	9 GWh	Oct 2011	Dec 2025	Natural Gas
Frankenheimer Power Plant	Turlock Irrigation District	Oakdale, CA	11 GWh	Feb 1983	Dec 2025	Water
FPL Energy Montezuma Winds LLC	FPL Energy Montezuma Wind	Birds Landing, CA	96 GWh	Oct 2010	Dec 2025	Wind
Foundation Wal-Mart Red Bluff	Foundation CA Fund VI Manager LLC	Red Bluff, CA	1 GWh	Aug 2012	May 2026	Wind
Foundation Superior Farms	Foundation CA Fund VI Manager LLC	Dixon, CA	875 MWh	Nov 2012	May 2026	Wind
Foundation ST	Foundation HA Energy Generation, LLC	Tracy, CA	2 GWh	May 2011	Dec 2025	Wind
Foundation Scheid Vineyards	Foundation CA Fund VIII Manager, LLC	Greenfield, CA	4 GWh	Aug 2017	Dec 2025	Wind
Foundation SaIinas Valley State Prison	Foundation CA Fund IX Manager, LLC	Soledad, CA	5 GWh	Jul 2018	Dec 2025	Wind
Foundation RRM	Foundation CA Fund V Manager, LLC	Cabazon, CA	10 GWh	Nov 2012	Dec 2025	Wind
Foundation NWNA	Foundation CA Fund V Manager, LLC	Cabazon, CA	23 GWh	Nov 2012	Dec 2025	Wind
Foundation Mann Packing	Foundation CA Fund IX Manager, LLC	Gonzales, CA	6 GWh	Mar 2019	Dec 2025	Wind
Foundation IE	Foundation HA Energy Generation, LLC	Rancho Cucamonga, CA	404 MWh	Nov 2011	Dec 2025	Wind
Foundation Dole Fresh Vegetables	Foundation CA Fund X Manager LLC	Soledad, CA	18 GWh	Jul 2022	Dec 2025	Wind
Foundation Cemex River Plant	Foundation CA Fund VI Manager LLC	Victorville, CA	4 GWh	Nov 2012	Dec 2025	Wind
Foundation Cemex Madison	Foundation CA Fund V Manager, LLC	Madison, CA	2 GWh	Jul 2012	Dec 2025	Wind
Foundation Cemex BMQ	Foundation CA Fund VI Manager LLC	Apple Valley, CA	4 GWh	Nov 2012	Dec 2025	Wind
Foundation CDCR LAC	Foundation CA Fund VIII Manager, LLC	Lancaster, CA	4 GWh	Nov 2017	Dec 2025	Wind
Foundation California Training Facility	Foundation CA Fund IX Manager, LLC	Soledad, CA	6 GWh	Jul 2018	Dec 2025	Wind
Foundation AB	Foundation HA Energy Generation, LLC	Fairfield, CA	3 GWh	Oct 2011	Dec 2025	Wind
Foster Clean Power B	Foster Clean Power B LLC	Arcata, CA	901 MWh	Aug 2025	Dec 2025	Solar
Foster Clean Power A	Foster Clean Power A, LLC	Arcata, CA	846 MWh	Sep 2025	Dec 2025	Solar
Forks of Butte Hydro Project	Hypower Energy, LLC	Magalia, CA	58 GWh	Feb 1992	Dec 2025	Water
Forbestown	South Feather Water and Power Agency	Forbestown, CA	115 GWh	Sep 1963	Dec 2025	Water
Fontana	Southern California Edison Co	Rialto, CA	2 GWh	Nov 1917	Nov 2025	Water
FLEX Gibraltar	Bloom Energy	Milpitas, CA	8 GWh	Jan 2017	Dec 2025	Natural Gas
Five Points Solar Station	Pacific Gas & Electric Co.	Five Points, CA	13 GWh	Aug 2011	Dec 2025	Solar
Five Points Solar Park	Boralex US Operations LLC	Five Points, CA	81 GWh	Aug 2016	Dec 2025	Solar
Firestone Walker Brewery - Phase 1	SkyHigh 2 Solar	Paso Robles, CA	4 GWh	Oct 2020	Dec 2025	Solar

Surrounding Balancing Authorities

Rank	Balancing Authority	Annual Net Generation	# Power Plants
#25	Arizona Public Service Company	25.2 TWh	100
#54	Arlington Valley, LLC	3.2 TWh	1
#38	Balancing Authority of Northern California	13.7 TWh	90
#49	Imperial Irrigation District	6.2 TWh	66
#29	Los Angeles Department of Water and Power	18.8 TWh	131
#22	Nevada Power Company	36.8 TWh	143
#51	PUD No. 1 of Douglas County	4.4 TWh	4
#19	Salt River Project Agricultural Improvement and Power District	60.3 TWh	49
#57	Turlock Irrigation District	1.9 TWh	11
#40	Western Area Power Administration - Desert Southwest Region	10.4 TWh	34

Balancing Authorities with Similar Net Generation

Rank	Balancing Authority	Annual Net Generation	# Power Plants
#3	Electric Reliability Council of Texas, Inc.	494.1 TWh	1,471
#5	Southwest Power Pool	306.8 TWh	856
#6	Southern Company Services, Inc. - Trans	253.5 TWh	422
#7	California Independent System Operator	169.4 TWh	2,135
#9	Tennessee Valley Authority	163.4 TWh	207
#10	Florida Power & Light Co.	152.2 TWh	187
#12	New York Independent System Operator	134.3 TWh	1,299
#13	Duke Energy Carolinas	112.6 TWh	577
#15	ISO New England	111.1 TWh	1,629
#16	Bonneville Power Administration	91.6 TWh	167