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	Oct 2026
Annual Generation	168.7 TWh
Power Plants	2,170
Utilities	1,001
Ranked #7 out of 64 in terms of net annual generation
Ranked #14 out of 53 in terms of annual generation from natural gas
Power Plant Types	Natural Gas \| 32% Solar \| 30.9% Water \| 12.2% Wind \| 11.8% Nuclear \| 11.2% Coal \| 0%

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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
Merced 1 PV	ZGlobal Inc	Los Banos, CA	6 GWh	Mar 2018	Dec 2025	Solar
Wright Solar Park	Wright Solar Park LLC	Los Banos, CA	386 GWh	Nov 2019	Jul 2026	Solar
Vega Solar	Vega Solar, LLC	Los Banos, CA	49 GWh	Feb 2015	Dec 2025	Solar
Wonderful Lost Hills	Wonderful Renewable Energy, LLC.	Lost Hills, CA	41 GWh	Aug 2021	Dec 2025	Solar
Wonderful Orchards - Belridge	Wonderful Renewable Energy, LLC.	Lost Hills, CA	12 GWh	Nov 2020	Dec 2025	Solar
Wonderful Orchards - Westside	Wonderful Renewable Energy, LLC.	Lost Hills, CA	13 GWh	Jul 2021	Dec 2025	Solar
Wonderful Kings	Wonderful Renewable Energy, LLC.	Lost Hills, CA	8 GWh	Jul 2022	Dec 2025	Solar
SF Azalea, LLC	Idemitsu Renewables	Lost Hills, CA	107 GWh	Nov 2025	Jul 2026	Solar
Wonderful Huller & Shelling	Wonderful Renewable Energy, LLC.	Lost Hills, CA	4 GWh	Jul 2021	Dec 2025	Solar
Lost Hills Oilfield	Distributed Solar Development, LLC	Lost Hills, CA	4 GWh	Jun 2021	Dec 2025	Solar
Coronal Lost Hills	Arevon Energy, Inc.	Lost Hills, CA	35 GWh	Apr 2015	Dec 2025	Solar
Berrenda Mesa Water District	The Greater Light USA LLC	Lost Hills, CA	15 GWh	Jun 2023	Nov 2025	Solar
Morelos del Sol	Southern Power Co	Lost Hills, CA	31 GWh	Oct 2015	Dec 2025	Solar
Blackwell Solar Park	RWE Clean Energy	Lost Hills, CA	39 GWh	Dec 2018	Dec 2025	Solar
Chevron - Lost Hills Hybrid	MN8 Energy LLC	Lost Hills, CA	63 GWh	Mar 2020	Jul 2026	Solar
Lost Hills Cogeneration Plant	AERA Energy LLC	Lost Hills, CA	8 GWh	Sep 1985	Dec 2025	Natural Gas
Cottonwood Solar, LLC (Goose Lake)	Onward Energy	Lost Hills, CA	30 GWh	Apr 2015	Dec 2025	Solar
Nickel 1 Solar Facility	Altus Power America Management, LLC	Lost Hills, CA	2 GWh	Oct 2012	Dec 2025	Solar
Lost Hills/Blackwell	Southern Power Co	Lost Hills, CA	59 GWh	Mar 2015	Dec 2025	Solar
Lone Valley Solar Park II LLC	Lone Valley Solar Park II LLC	Lucerne Valley, CA	53 GWh	Nov 2014	Dec 2025	Solar
Lone Valley Solar Park I LLC	Lone Valley Solar Park I LLC	Lucerne Valley, CA	24 GWh	Nov 2014	Dec 2025	Solar
City of Madera WWTP	SunE GIL1, LLC	Madera, CA	2 GWh	Aug 2009	Dec 2025	Solar
Madera Community Hospital	CleanCapital Holdings	Madera, CA	2 GWh	Sep 2011	Dec 2025	Solar
Site 980 65	Madera-Chowchilla Power Auth	Madera, CA	2 GWh	Jan 1985	Jun 2025	Water
Borden Solar Farm	41MB 8me, LLC	Madera, CA	82 GWh	May 2020	Jul 2026	Solar
Pacific Ethanol Madera Solar Array	Seaboard Energy California, LLC	Madera, CA	4 GWh	Jul 2018	Dec 2025	Solar
Sealed Air Madera Solar Project	Sealed Air Corporation	Madera, CA	7 GWh	Apr 2022	Dec 2025	Solar
CA - Madera USD - Madera South HS	Forefront Power, LLC	Madera, CA	2 GWh	Aug 2023	Dec 2025	Solar
Costa View Farms	127 CVF, LLC	Madera, CA	11 GWh	May 2024	Dec 2025	Solar
Madera 1 PV	ZGlobal Inc	Madera, CA	3 GWh	Nov 2017	Dec 2025	Solar
Foundation Cemex Madison	Foundation CA Fund V Manager, LLC	Madison, CA	2 GWh	Jul 2012	Dec 2025	Wind
De Sabla	Pacific Gas & Electric Co.	Magalia, CA	21 GWh	Jan 1963	Dec 2025	Water
Toadtown	Pacific Gas & Electric Co.	Magalia, CA	2 GWh	Mar 1986	Oct 2025	Water
Forks of Butte Hydro Project	Hypower Energy, LLC	Magalia, CA	58 GWh	Feb 1992	Dec 2025	Water
Mammoth G3	Ormat Nevada Inc	Mammoth Lakes, CA	75 GWh	Nov 1990	Dec 2025	Geothermal
Mammoth G2	Ormat Nevada Inc	Mammoth Lakes, CA	84 GWh	Nov 1990	Dec 2025	Geothermal
Mammoth G1	Ormat Nevada Inc	Mammoth lakes, CA	44 GWh	Nov 1984	Dec 2025	Geothermal
CD4	CD4	Mammoth Lakes, CA	236 GWh	Jun 2022	Dec 2025	Geothermal
CA Manteca 730 Spreckels Ave	Catalyze Manteca 730 Spreckels Avenue Microgrid LLC	Manteca, CA	100 MWh	Aug 2024	Dec 2025	Solar
Manteca Land PV	AES Distributed Energy	Manteca, CA	2 GWh	Nov 2017	Dec 2025	Solar
Ameresco Forward	Ameresco Forward, LLC	Manteca, CA	32 GWh	Jan 2014	Dec 2025	Landfill Gas
Ponderosa Bailey Creek	Snow Mountain Hydro LLC	Manton, CA	4 GWh	Feb 1990	Dec 2025	Water
Volta 2	Pacific Gas & Electric Co.	Manton, CA	4 GWh	Oct 1981	Dec 2025	Water
Volta 1	Pacific Gas & Electric Co.	Manton, CA	21 GWh	Mar 1980	Dec 2025	Water
South	Pacific Gas & Electric Co.	Manton, CA	11 GWh	Nov 1979	Dec 2025	Water
Berry Cogen Tanne Hills 18	Berry Petroleum Co	Maricopa, CA	138 GWh	Nov 1986	Jul 2026	Natural Gas
Marina Landfill Gas	Monterey Regional Waste Mgmt	Marina, CA	10 GWh	Mar 1998	Dec 2025	Landfill Gas
Monterey One Water	Monterey One Water	Marina, CA	8 GWh	Jul 1988	Dec 2025	Other Biomass Gas : 78.5% Natural Gas : 21.5%
Monterey Regional Water Pollution Contro	Tesla Inc.	Marina, CA	1 GWh	Nov 2010	Dec 2025	Solar
Martinez Refining	Martinez Refining Co	Martinez, CA	662 GWh	Oct 1995	Jul 2026	Natural Gas : 96.3% Other Gas : 3.7%
CCCSD Wastewater Treatment Plnt	Central Contra Costa Sanitary District	Martinez, CA	20 GWh	Nov 1995	Jul 2026	Natural Gas
Marathon Bay Area Cogen	Tesoro Marketing & Refining Co. LLC (Martinez)	Martinez, CA	598 GWh	Jan 1987	Jul 2026	Natural Gas
Martinez Sulfuric Acid Regeneration Plt	Eco Services Corp.	Martinez, CA	13 GWh	Dec 1977	Dec 2025	Waste Heat
Central San	REC CSD, LLC	Martinez, CA	3 GWh	Dec 2024	Dec 2025	Solar
Colusa Generating Station	Pacific Gas & Electric Co.	Maxwell, CA	2 TWh	Nov 2010	Jul 2026	Natural Gas
Cymric 31X Cogen	Chevron USA Inc	McKittrick, CA	17 GWh	Sep 1988	Dec 2025	Natural Gas
Pumpjack Solar I	Deriva Energy	McKittrick, CA	51 GWh	Dec 2014	Dec 2025	Solar
Cymric 36W Cogen	Chevron USA Inc	McKittrick, CA	53 GWh	Sep 1982	Dec 2025	Natural Gas
South Belridge Cogeneration Facility	AERA Energy LLC	McKittrick, CA	475 GWh	Nov 1985	Jul 2026	Natural Gas
La Paloma Generating Plant	CXA La Paloma LLC	McKittrick, CA	1 TWh	Dec 2002	Jul 2026	Natural Gas
Cymric 6Z Cogen	Chevron USA Inc	McKittrick, CA	27 GWh	Jun 1986	Dec 2025	Natural Gas
Welport Lease Project	Sentinel Peak Resources California, LLC	McKittrick, CA	34 GWh	Feb 1990	Dec 2025	Natural Gas
McKittrick Cogen	Chevron USA Inc	McKittrick, CA	61 GWh	May 2012	Dec 2025	Natural Gas
Rio Bravo Solar 1 LLC	Deriva Energy	McKittrick, CA	52 GWh	Nov 2016	Dec 2025	Solar
Rio Bravo Solar II LLC	Deriva Energy	McKittrick, CA	52 GWh	Nov 2016	Dec 2025	Solar
CalRenew-1	CalRenew-1 LLC	Mendota, CA	2 GWh	Mar 2010	Dec 2025	Solar
North Star Solar	Southern Power Co	Mendota, CA	133 GWh	May 2015	Dec 2025	Solar
Little Bear Solar 1, LLC	Little Bear Solar 1, LLC (Longroad)	Mendota, CA	71 GWh	Nov 2020	Jul 2026	Solar
Little Bear 3	Little Bear Solar 3, LLC (Longroad)	Mendota, CA	20 GWh	Nov 2020	Dec 2025	Solar
Little Bear 4	Little Bear Solar 4, LLC (Longroad)	Mendota, CA	41 GWh	Nov 2020	Jul 2026	Solar
Little Bear 5	Little Bear Solar 5, LLC (Longroad)	Mendota, CA	106 GWh	Nov 2020	Jul 2026	Solar
Citizen B	AES Distributed Energy	Mendota, CA	9 GWh	Nov 2015	Dec 2025	Solar
Luna Valley	Luna Valley Solar I, LLC	Mendota, CA	369 GWh	Jul 2025	Jul 2026	Solar
EMWD - Sun City RWRF	SkyHigh 2 Solar	Menifee, CA	4 GWh	Jun 2021	Dec 2025	Solar
SRI International Cogen Project	IPT SRI Cogeneration Inc	Menlo Park, CA	24 GWh	Mar 1987	Jul 2026	Natural Gas
Mission Solar LLC	Ecos Energy LLC	Merced, CA	4 GWh	Nov 2014	Dec 2025	Solar
Merced Solar LLC	Ecos Energy LLC	Merced, CA	4 GWh	Nov 2014	Dec 2025	Solar
2097 Helton Solar Project	Solarenewal LLC	Merced, CA	1 GWh	Mar 2014	Dec 2025	Solar
Broadway 3 - UC Merced 1	MN8 Energy LLC	Merced, CA	929 MWh	Sep 2009	Dec 2025	Solar
Five H Farms Solar Array	Maas Energy Works	Merced, CA	2 GWh	Mar 2021	Dec 2025	Solar
UC Merced Solar Hybrid	MN8 Energy LLC	Merced, CA	8 GWh	Nov 2018	Dec 2025	Solar
Merced Pipeline	Maas Energy Works	Merced, CA	1 GWh	Jun 2023	Dec 2025	Solar
Sandrini Solar 200	EDPR CA Solar Park LLC	Mettler, CA	484 GWh	Nov 2024	Jul 2026	Solar
Sandrini Solar 100	EDPR CA Solar Park II LLC	Mettler, CA	248 GWh	Nov 2024	Jul 2026	Solar
Sonoma California Geothermal	Geysers Power Co LLC	Middletown, CA	436 GWh	Nov 1983	Dec 2025	Geothermal
Aidlin Geothermal Power Plant	Geysers Power Co LLC	Middletown, CA	82 GWh	Apr 1989	Dec 2025	Geothermal
Geothermal 1	Northern California Power Agny	Middletown, CA	307 GWh	Dec 1982	Jul 2026	Geothermal
Calistoga Power Plant	Geysers Power Co LLC	Middletown, CA	454 GWh	Feb 1984	Jul 2026	Geothermal
Geothermal 2	Northern California Power Agny	Middletown, CA	324 GWh	Nov 1985	Jul 2026	Geothermal
Geysers Unit 5-20	Geysers Power Co LLC	Middletown, CA	4 TWh	Mar 1971	Jul 2026	Geothermal
Mill Creek 3	Southern California Edison Co	Mill Creek, CA	771 MWh	Feb 1903	Dec 2025	Water
FLEX Gibraltar	Bloom Energy	Milpitas, CA	8 GWh	Jan 2017	Dec 2025	Natural Gas
CST001 McCarthy Fuel Cell	2016 ESA Project Company, LLC	Milpitas, CA	9 GWh	Dec 2018	Dec 2025	Natural Gas
Mira Loma	Costco Wholesale	Mira Loma, CA	2 GWh	Oct 2011	Dec 2025	Solar
Moccasin Low Head Hydro Project	City & County of San Francisco - (CA)	Moccasin, CA	3 GWh	Jun 1987	Dec 2025	Water
Moccasin	City & County of San Francisco - (CA)	Moccasin, CA	305 GWh	Jul 1969	Jul 2026	Water
Axium Modesto Solar	Axium US Solar Holdings LLC	Modesto, CA	53 GWh	Nov 2012	Dec 2025	Solar
Pinyon Pine II	Pinyon Pines Wind II, LLC	Mojave, CA	204 GWh	Oct 2012	Dec 2025	Wind
Brookfield Tehachapi 1	Coram California Development, L.P.	Mojave, CA	164 GWh	Feb 2012	Dec 2025	Wind
Mustang Hills LLC	Mustang Hills, LLC (Longroad)	Mojave, CA	267 GWh	Apr 2012	Dec 2025	Wind

Surrounding Balancing Authorities

Rank	Balancing Authority	Annual Net Generation	# Power Plants
#25	Arizona Public Service Company	25.8 TWh	102
#55	Arlington Valley, LLC	3.2 TWh	1
#38	Balancing Authority of Northern California	13.9 TWh	91
#49	Imperial Irrigation District	6.2 TWh	66
#29	Los Angeles Department of Water and Power	19.3 TWh	132
#22	Nevada Power Company	38.6 TWh	143
#51	PUD No. 1 of Douglas County	4.4 TWh	5
#19	Salt River Project Agricultural Improvement and Power District	60.5 TWh	51
#57	Turlock Irrigation District	1.9 TWh	11
#39	Western Area Power Administration - Desert Southwest Region	10.6 TWh	36

Balancing Authorities with Similar Net Generation

Rank	Balancing Authority	Annual Net Generation	# Power Plants
#3	Electric Reliability Council of Texas, Inc.	506.3 TWh	1,487
#5	Southwest Power Pool	314.5 TWh	876
#6	Southern Company Services, Inc. - Trans	259.3 TWh	423
#7	California Independent System Operator	168.7 TWh	2,170
#9	Tennessee Valley Authority	166.2 TWh	209
#10	Florida Power & Light Co.	153.0 TWh	188
#12	New York Independent System Operator	134.1 TWh	1,334
#13	Duke Energy Carolinas	113.4 TWh	578
#15	ISO New England	112.2 TWh	1,667
#16	Bonneville Power Administration	91.1 TWh	170