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
Imperial Solar Energy Center West	CSOLAR IV West LLC	Seeley, CA	388 GWh	Mar 2016	Dec 2023	Solar
Pit 4	Pacific Gas & Electric Co.	Big Bend, CA	388 GWh	Jun 1955	Mar 2025	Water
North Sky River Energy LLC	North Sky River Energy LLC	Weldon, CA	387 GWh	Nov 2012	Dec 2023	Wind
Chestnut	Chestnut Westside, LLC	Lemoore, CA	385 GWh	Nov 2023	Mar 2025	Solar : 95.4%
RE Garland	Southern Power Co	Rosamond, CA	384 GWh	Oct 2016	Dec 2023	Solar
James B Black	Pacific Gas & Electric Co.	Big Bend, CA	380 GWh	Nov 1965	Mar 2025	Water
Solar Gen 2 Solar Facility	Southern Power Co	Calipatria, CA	377 GWh	Oct 2014	Dec 2023	Solar
Maverick Solar, LLC	Maverick Solar, LLC	Desert Center, CA	375 GWh	Nov 2020	Mar 2025	Solar
Coso Finance Partners	Coso Operating Co LLC	Inyokern, CA	375 GWh	Jun 1987	Mar 2025	Geothermal
Belden	Pacific Gas & Electric Co.	Belden, CA	365 GWh	Aug 1969	Nov 2024	Water
Scarlet Solar (CA)	EDP Renewables North America LLC	Fresno, CA	365 GWh	-	Mar 2025	Solar
Malburg	City of Vernon	Vernon, CA	362 GWh	Sep 2005	Mar 2025	Natural Gas
Alta Wind Energy Center I	Alta Wind Energy Center I	Mojave, CA	361 GWh	Dec 2010	Dec 2023	Wind
Humboldt Bay	Pacific Gas & Electric Co.	Eureka, CA	360 GWh	Aug 2010	Mar 2025	Natural Gas : 99.6%
Caribou 2	Pacific Gas & Electric Co.	Belden, CA	358 GWh	Oct 1958	Mar 2025	Water
Big Creek 4	Southern California Edison Co	North Fork, CA	357 GWh	May 1951	Mar 2025	Water
Proxima	Proxima Solar, LLC	Crows Landing, CA	355 GWh	-	Mar 2025	Solar
Wright Solar Park	Wright Solar Park LLC	Los Banos, CA	354 GWh	Nov 2019	Mar 2025	Solar
Blythe Solar III, LLC Hybrid	Blythe Solar III, LLC	Blythe, CA	353 GWh	Apr 2020	Mar 2025	Solar
BigBeau Solar, LLC	Big Beau Solar, LLC	Rosamond, CA	353 GWh	Jan 2022	Mar 2025	Solar
Copper Mountain Solar 2	Consolidated Edison Development Inc.	Boulder City, NV	349 GWh	Jun 2012	Dec 2023	Solar
Edwards Sanborn E1B	Terra-Gen Operating Co-Hybrid	Mojave, CA	349 GWh	Oct 2022	Mar 2025	Solar
Donnells	Oakdale&South San Joaquin Irrigation D.	None, CA	348 GWh	May 1957	Dec 2023	Water
Imperial Valley Solar, LLC	Imperial Valley Solar, LLC	Calexico, CA	346 GWh	Oct 2013	Dec 2023	Solar
Pit 3	Pacific Gas & Electric Co.	Burney, CA	345 GWh	Jun 1925	Dec 2023	Water
Tule Wind LLC	Avangrid Renewables LLC	Boulevard, CA	341 GWh	Nov 2017	Mar 2025	Wind
Thermalito	California Dept. of Water Resources	Oroville, CA	340 GWh	Jan 1968	Mar 2025	Water
Blythe Solar II, LLC	Blythe Solar II, LLC	Blythe, CA	338 GWh	Jun 2016	Mar 2025	Solar
Alta Wind X	Alta Wind X, LLC	Mojave, CA	337 GWh	Dec 2013	Dec 2023	Wind
Stanislaus	Pacific Gas & Electric Co.	Vallecito, CA	334 GWh	Feb 1963	Dec 2023	Water
American Kings Solar, LLC	MN8 Energy LLC	Lemoore, CA	332 GWh	Nov 2020	Mar 2025	Solar
Edwards Sanborn E1A	Terra-Gen Operating Co-Hybrid	Mojave, CA	330 GWh	Jul 2022	Mar 2025	Solar
Raceway Solar & Storage	AES Clean Energy	Lancaster, CA	329 GWh	-	Mar 2025	Solar
Campo Verde Solar	Southern Power Co	El Centro, CA	329 GWh	Sep 2013	Dec 2023	Solar
Stockton Biomass	DTE Stockton LLC	Stockton, CA	326 GWh	Nov 1987	Dec 2023	Wood/Wood Waste Solids : 99.6%
Big Creek 2A	Southern California Edison Co	Auberry, CA	326 GWh	Jul 1928	Mar 2025	Water
Sentinel Energy Center, LLC	Sentinel Energy Center LLC	Desert Hot Springs, CA	320 GWh	Apr 2013	Mar 2025	Natural Gas
Fifth Standard Solar PV, LLC (Hybrid)	RWE Renewables Americas, LLC	Huron, CA	319 GWh	Aug 2023	Mar 2025	Solar
Pit 7	Pacific Gas & Electric Co.	Montgomery Creek, CA	319 GWh	Aug 1965	Mar 2025	Water
Blythe Solar IV, LLC	Blythe Solar IV, LLC	Blythe, CA	318 GWh	Oct 2020	Mar 2025	Solar
Poe	Pacific Gas & Electric Co.	Storrie, CA	315 GWh	Sep 1958	Mar 2025	Water
CA Flats Solar 150, LLC	Arevon Energy, Inc.	Shandon, CA	315 GWh	Jan 2019	Mar 2025	Solar
Drew Solar LLC	Drew Solar LLC	Calexico, CA	313 GWh	Oct 2022	Mar 2025	Solar
Sun Streams 2	Sun Streams 2, LLC	Hassayampa, AZ	311 GWh	May 2021	Mar 2025	Solar
Panoche Valley Solar Farm	Consolidated Edison Development Inc.	Paicines, CA	309 GWh	Dec 2017	Mar 2025	Solar
Coso Power Developers	Coso Operating Co LLC	Inyokern, CA	308 GWh	Oct 1989	Mar 2025	Geothermal
Edwards Sanborn E4	Terra-Gen Operating Co-Hybrid	Mojave, CA	305 GWh	Nov 2022	Mar 2025	Solar
Dixie Valley	Ormat Nevada Inc	Fallon, NV	303 GWh	May 1988	Mar 2025	Geothermal
Geothermal 2	Northern California Power Agny	Middletown, CA	303 GWh	Nov 1985	Mar 2025	Geothermal
Alta Wind Energy Center III	Alta Wind Energy Center III	Mojave, CA	303 GWh	Jan 2011	Dec 2023	Wind
Maverick Solar 7, LLC	Maverick Solar 7, LLC	Desert Center, CA	302 GWh	Nov 2021	Mar 2025	Solar
Alta Wind Energy Center II	Alta Wind Energy Center II	Mojave, CA	300 GWh	Dec 2010	Dec 2023	Wind
THUMS	THUMS Long Beach Company	Long Beach, CA	299 GWh	Dec 2002	Mar 2025	Natural Gas
Wistaria Ranch Solar	Consolidated Edison Development Inc.	Calexico, CA	297 GWh	Nov 2018	Mar 2025	Solar
Big Creek 2	Southern California Edison Co	Auberry, CA	296 GWh	Nov 1913	Dec 2023	Water
Shiloh IV Wind Project LLC	EDF Renewable Asset Holdings, Inc.	Birds Landing, CA	294 GWh	Nov 2012	Dec 2023	Wind
Mesquite Solar 2, LLC	Consolidated Edison Development Inc.	Tonopah, AZ	293 GWh	Nov 2016	Mar 2025	Solar
Edwards Sanborn E2	Terra-Gen Operating Co-Hybrid	Mojave, CA	293 GWh	Nov 2021	Mar 2025	Solar
Arlington Energy Center III	Arlington Energy Center III	Blythe, CA	293 GWh	Jul 2022	Mar 2025	Solar
Valentine Solar, LLC	EDF Renewable Asset Holdings, Inc.	Rosamond, CA	292 GWh	Oct 2019	Mar 2025	Solar
Phillips 66 Rodeo Refinery	Phillips 66 Company	Rodeo, CA	291 GWh	Apr 1987	Aug 2024	Other Gas : 72.8% Natural Gas : 27.2%
Mountain View I & II	AES Distributed Energy	North Palm Springs, CA	285 GWh	May 2001	Mar 2025	Wind
Ivanpah 2	NRG Energy Services	Nipton, CA	283 GWh	Nov 2013	Mar 2025	Solar : 95.8% Natural Gas : 4.2%
Hudson - High Desert Hybrid	MN8 Energy LLC	Victorville, CA	280 GWh	Nov 2021	Mar 2025	Solar
Moccasin	City & County of San Francisco	Moccasin, CA	278 GWh	Jul 1969	Mar 2025	Water
Wheelabrator Shasta	Shasta Sustainable Resource Management, Inc.	Anderson, CA	278 GWh	Sep 1987	Mar 2025	Wood/Wood Waste Solids
Coso Energy Developers	Coso Operating Co LLC	Inyokern, CA	277 GWh	Nov 1988	Dec 2023	Geothermal
Imperial Solar Energy Center South	CSOLAR IV South LLC	Calexico, CA	277 GWh	Oct 2013	Dec 2023	Solar
Narrows 2	Yuba County Water Agency	Browns Valley, CA	277 GWh	Nov 1969	Dec 2023	Water
Shiloh III Wind Project LLC	EDF Renewable Asset Holdings, Inc.	Birds Landing, CA	276 GWh	Nov 2011	Dec 2023	Wind
Sycamore Cogeneration	Sycamore Cogeneration Co	Bakersfield, CA	273 GWh	Nov 1987	Feb 2025	Natural Gas
CD4	CD4	Mammoth Lakes, CA	272 GWh	Jun 2022	Dec 2023	Geothermal
US Borax	U S Borax Inc	Boron, CA	271 GWh	Jun 1984	Mar 2025	Natural Gas
Drum 2	Pacific Gas & Electric Co.	Alta, CA	271 GWh	Nov 1965	Dec 2023	Water
Ivanpah 3	NRG Energy Services	Nipton, CA	270 GWh	Nov 2013	Mar 2025	Solar : 96.1% Natural Gas : 3.9%
Sunshine Valley Solar	EDP Renewables North America LLC	Armagosa, NV	268 GWh	Nov 2019	Mar 2025	Solar
Carlsbad Energy Center	NRG California Peaker Operations LLC	Carlsbad, CA	267 GWh	Nov 2018	Mar 2025	Natural Gas
Pacific Wind LLC	EDF Renewable Asset Holdings, Inc.	Rosamond, CA	264 GWh	Jul 2012	Dec 2023	Wind
Catalina Solar LLC	EDF Renewable Asset Holdings, Inc.	Rosamond, CA	263 GWh	Nov 2012	Dec 2023	Solar
Rising Tree Wind Farm III	Rising Tree Wind Farm III LLC	Mojave, CA	262 GWh	May 2015	Dec 2023	Wind
Antelope Expansion 2	AES Distributed Energy	Lancaster, CA	260 GWh	Nov 2018	Mar 2025	Solar
Salinas River Cogeneration	Salinas River Cogeneration Co	San Ardo, CA	256 GWh	Oct 1991	Mar 2025	Natural Gas
AES Redondo Beach LLC	AES Redondo Beach LLC	Redondo Beach, CA	256 GWh	Sep 1954	Dec 2023	Natural Gas
Argus Cogen Plant	Searles Valley Minerals Operations Inc.	Trona, CA	256 GWh	Nov 1947	Mar 2025	Bituminous Coal : 94.3% Natural Gas : 5.7%
Rabbitbrush Solar, LLC	Leeward Asset Management, LLC	Rosamond, CA	255 GWh	Sep 2022	Mar 2025	Solar : 99.8%
Midway Sunset Cogen	Midway-Sunset Cogeneration Co	Fellows, CA	255 GWh	Apr 1989	Mar 2025	Natural Gas
Electra	Pacific Gas & Electric Co.	Jackson, CA	252 GWh	May 1948	Mar 2025	Water
Exchequer	Merced Irrigation District	Snelling, CA	251 GWh	Jun 1967	Dec 2023	Water
Hatchet Ridge Wind Project	Pattern Operators LP	Burney, CA	248 GWh	Nov 2010	Dec 2023	Wind
Pinyon Pine I	Pinyon Pines Wind I, LLC	Mojave, CA	248 GWh	Oct 2012	Dec 2023	Wind
Mustang Hills LLC	Mustang Hills, LLC (Longroad)	Mojave, CA	248 GWh	Apr 2012	Dec 2023	Wind
Los Esteros Critical Energy Center	Los Esteros Critical Energy Facility LLC	San Jose, CA	248 GWh	Jan 2003	Mar 2025	Natural Gas
Golden Hills Wind	Golden Hills Wind, LLC	Livermore, CA	248 GWh	Nov 2015	Dec 2023	Wind
Alta Wind XI	Alta Wind XI, LLC	Mojave, CA	248 GWh	Dec 2013	Dec 2023	Wind
Resurgence Solar	Resurgence Solar	Boron, CA	248 GWh	Jul 2023	Mar 2025	Solar
New-Indy Ontario Mill	New-Indy Ontario LLC	Ontario, CA	246 GWh	May 1985	Mar 2025	Natural Gas
Tiger Creek	Pacific Gas & Electric Co.	Pioneer, CA	246 GWh	May 1931	Dec 2023	Water
San Pablo Raceway	AES Distributed Energy	Lancaster, CA	245 GWh	Jul 2019	Mar 2025	Solar
Brea Expansion Plant	Brea Power II	Brea, CA	244 GWh	Oct 2012	Mar 2025	Landfill Gas
Maverick Solar 4, LLC	Maverick Solar 4, LLC	Desert Center, CA	241 GWh	Nov 2020	Mar 2025	Solar

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