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	Mar 2026
Annual Generation	179.9 TWh
Power Plants	2,075
Utilities	965
Ranked #7 out of 65 in terms of net annual generation
Ranked #8 out of 54 in terms of annual generation from natural gas
Power Plant Types	Natural Gas \| 40.1% Solar \| 27.8% Water \| 12.2% Wind \| 10.2% Nuclear \| 9.7%

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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
Mount Signal Solar Farm II	MN8 Energy LLC	Calexico, CA	403 GWh	Dec 2019	Dec 2025	Solar
Mesquite Solar 1	Consolidated Edison Development Inc.	Tonopah, AZ	401 GWh	Oct 2011	Dec 2024	Solar
R C Kirkwood	City & County of San Francisco	Groveland, CA	400 GWh	Jan 1967	Dec 2025	Water
North Rosamond Solar LLC	North Rosamond Solar, LLC	Rosamond, CA	397 GWh	May 2019	Dec 2025	Solar
Pit 4	Pacific Gas & Electric Co.	Big Bend, CA	397 GWh	Jun 1955	Dec 2025	Water
Mustang Two	RE Mustang Two LLC	Lemoore, CA	396 GWh	Oct 2020	Dec 2025	Solar
Shiloh Wind Project 2 LLC	EDF Renewable Asset Holdings, Inc.	Birds Landing, CA	393 GWh	Dec 2008	Dec 2024	Wind
Shiloh I Wind Project	Avangrid Power LLC	Rio Vista, CA	390 GWh	Apr 2006	Dec 2024	Wind
Voyager Wind I	Terra-Gen Operating Co-Wind	Mojave, CA	389 GWh	Nov 2019	Dec 2025	Wind
Scarlet II Hybrid	EDPR Scarlet II LLC	Cantua Creek, CA	385 GWh	Nov 2024	Dec 2025	Solar
Alta Wind X	Alta Wind X, LLC	Mojave, CA	379 GWh	Dec 2013	Dec 2024	Wind
Chestnut	Castanea Project LLC	Lemoore, CA	378 GWh	Nov 2023	Dec 2025	Solar
Desert Star Energy Center	Desert Star Energy Center SDG&E	Boulder City, NV	375 GWh	Apr 2000	Dec 2025	Natural Gas
Imperial Solar Energy Center West	CSOLAR IV West LLC	Seeley, CA	374 GWh	Mar 2016	Dec 2024	Solar
Maverick Solar, LLC	Maverick Solar, LLC	Desert Center, CA	370 GWh	Nov 2020	Dec 2025	Solar
Raceway Solar & Storage	AES Clean Energy	Lancaster, CA	368 GWh	Apr 2024	Dec 2025	Solar
Big Creek 4	Southern California Edison Co	North Fork, CA	365 GWh	May 1951	Dec 2025	Water
Tule Wind LLC	Avangrid Power LLC	Boulevard, CA	365 GWh	Nov 2017	Dec 2025	Wind
Coso Finance Partners	Coso Operating Co LLC	Inyokern, CA	365 GWh	Jun 1987	Dec 2025	Geothermal
Alta Wind Energy Center II	Alta Wind II, LLC	Mojave, CA	365 GWh	Dec 2010	Dec 2024	Wind
Solar Gen 2 Solar Facility	Southern Power Co	Calipatria, CA	364 GWh	Oct 2014	Dec 2024	Solar
Alta Wind Energy Center III	Alta Wind III, LLC	Mojave, CA	363 GWh	Jan 2011	Dec 2024	Wind
BigBeau Solar, LLC	Big Beau Solar, LLC	Rosamond, CA	362 GWh	Jan 2022	Dec 2025	Solar
Poe	Pacific Gas & Electric Co.	Storrie, CA	361 GWh	Sep 1958	Dec 2025	Water
Copper Mountain Solar 2	Consolidated Edison Development Inc.	Boulder City, NV	356 GWh	Jun 2012	Dec 2024	Solar
Big Creek 2	Southern California Edison Co	Auberry, CA	355 GWh	Nov 1913	Dec 2024	Water
Edwards Sanborn E1B	Terra-Gen Operating Co-Hybrid	Mojave, CA	355 GWh	Oct 2022	Dec 2025	Solar
Blythe Solar III, LLC Hybrid	Blythe Solar III, LLC	Blythe, CA	355 GWh	Apr 2020	Dec 2025	Solar
Centinela Solar Energy	Arevon Energy, Inc.	Calexico, CA	353 GWh	Jun 2013	Dec 2024	Solar
Maverick Solar 7, LLC	Maverick Solar 7, LLC	Desert Center, CA	352 GWh	Nov 2021	Dec 2025	Solar
Humboldt Bay	Pacific Gas & Electric Co.	Eureka, CA	348 GWh	Aug 2010	Dec 2025	Natural Gas : 99.6%
Blythe Solar IV, LLC	Blythe Solar IV, LLC	Blythe, CA	347 GWh	Oct 2020	Dec 2025	Solar
Stockton Biomass	DTE Stockton LLC	Stockton, CA	343 GWh	Nov 1987	Dec 2024	Wood/Wood Waste Solids : 99.5%
Collierville Powerhouse	Northern California Power Agny	Murphys, CA	342 GWh	Oct 1989	Dec 2025	Water
Geothermal 1	Northern California Power Agny	Middletown, CA	338 GWh	Dec 1982	Dec 2025	Geothermal
Cresta	Pacific Gas & Electric Co.	Storrie, CA	338 GWh	Oct 1949	Dec 2024	Water
Blythe Solar II, LLC	Blythe Solar II, LLC	Blythe, CA	337 GWh	Jun 2016	Dec 2025	Solar
Pit 3	Pacific Gas & Electric Co.	Burney, CA	333 GWh	Jun 1925	Dec 2024	Water
Edwards Sanborn E1A	Terra-Gen Operating Co-Hybrid	Mojave, CA	333 GWh	Jul 2022	Dec 2025	Solar
Pine Flat	Kings River Conservation Dist	Piedra, CA	331 GWh	Dec 1983	Sep 2025	Water
Sun Streams 2	Sun Streams 2, LLC	Hassayampa, AZ	328 GWh	May 2021	Dec 2025	Solar
Ralston	Placer County Water Agency	Foresthill, CA	328 GWh	Sep 1966	Dec 2024	Water
American Kings Solar, LLC	MN8 Energy LLC	Lemoore, CA	324 GWh	Nov 2020	Dec 2025	Solar
Thermalito	California Dept. of Water Resources	Oroville, CA	322 GWh	Jan 1968	Dec 2025	Water
Geothermal 2	Northern California Power Agny	Middletown, CA	322 GWh	Nov 1985	Dec 2025	Geothermal
Edwards Sanborn E4	Terra-Gen Operating Co-Hybrid	Mojave, CA	321 GWh	Nov 2022	Dec 2025	Solar
Arlington Energy Center III	Arlington Energy Center III	Blythe, CA	321 GWh	Jul 2022	Dec 2025	Solar
Stanislaus	Pacific Gas & Electric Co.	Vallecito, CA	316 GWh	Feb 1963	Oct 2024	Water
Blythe Energy Inc	AltaGas Blythe Operations Inc	Blythe, CA	315 GWh	Nov 2003	Dec 2025	Natural Gas
Coso Power Developers	Coso Operating Co LLC	Inyokern, CA	315 GWh	Oct 1989	Dec 2025	Geothermal
Pacific Wind LLC	EDF Renewable Asset Holdings, Inc.	Rosamond, CA	311 GWh	Jul 2012	Dec 2024	Wind
Malburg	City of Vernon	Vernon, CA	310 GWh	Sep 2005	Dec 2025	Natural Gas
Drew Solar LLC	Drew Solar LLC	Calexico, CA	308 GWh	Oct 2022	Dec 2025	Solar
Pinyon Pine I	Pinyon Pines Wind I, LLC	Mojave, CA	307 GWh	Oct 2012	Dec 2024	Wind
CA Flats Solar 150, LLC	Arevon Energy, Inc.	Shandon, CA	305 GWh	Jan 2019	Dec 2025	Solar
Mustang Hills LLC	Mustang Hills, LLC (Longroad)	Mojave, CA	301 GWh	Apr 2012	Dec 2024	Wind
Fifth Standard Solar PV, LLC (Hybrid)	Big Sky Wind, LLC	Huron, CA	301 GWh	Aug 2023	Dec 2025	Solar
Edwards Sanborn E2	Terra-Gen Operating Co-Hybrid	Mojave, CA	301 GWh	Nov 2021	Dec 2025	Solar
Baldy Mesa Solar & Storage	AES Clean Energy	Adelanto, CA	297 GWh	Apr 2024	Dec 2025	Solar
Campo Verde Solar	Southern Power Co	El Centro, CA	295 GWh	Sep 2013	Dec 2024	Solar
Electra	Pacific Gas & Electric Co.	Jackson, CA	291 GWh	May 1948	Dec 2025	Water
Phillips 66 Rodeo Refinery	Phillips 66 Company	Rodeo, CA	291 GWh	Apr 1987	Aug 2024	Other Gas : 72.8% Natural Gas : 27.2%
Hudson - High Desert Hybrid	MN8 Energy LLC	Victorville, CA	289 GWh	Nov 2021	Dec 2025	Solar
Wistaria Ranch Solar	Consolidated Edison Development Inc.	Calexico, CA	289 GWh	Nov 2018	Dec 2025	Solar
Alta Wind Energy Center V	Alta Wind V, LLC	Mojave, CA	288 GWh	Mar 2011	Dec 2024	Wind
Valentine Solar, LLC	EDF Renewable Asset Holdings, Inc.	Rosamond, CA	288 GWh	Oct 2019	Dec 2025	Solar
Mesquite Solar 2, LLC	Consolidated Edison Development Inc.	Tonopah, AZ	286 GWh	Nov 2016	Dec 2025	Solar
Wheelabrator Shasta	Shasta Sustainable Resource Management, Inc.	Anderson, CA	285 GWh	Sep 1987	Dec 2025	Wood/Wood Waste Solids
Shiloh IV Wind Project LLC	EDF Renewable Asset Holdings, Inc.	Birds Landing, CA	278 GWh	Nov 2012	Dec 2024	Wind
CD4	CD4	Mammoth Lakes, CA	277 GWh	Jun 2022	Dec 2024	Geothermal
Brookfield Tehachapi 1	Coram California Development, L.P.	Mojave, CA	277 GWh	Feb 2012	Dec 2024	Wind
Moccasin	City & County of San Francisco	Moccasin, CA	277 GWh	Jul 1969	Dec 2025	Water
Valero Refinery Cogeneration Unit 1	Valero Refining Co California	Benicia, CA	276 GWh	Sep 2002	Dec 2025	Natural Gas : 85.0% Other Gas : 15.0%
Mountain View I & II	AES Distributed Energy	North Palm Springs, CA	275 GWh	May 2001	Dec 2025	Wind
US Borax	U S Borax Inc	Boron, CA	274 GWh	Jun 1984	Dec 2025	Natural Gas
Panoche Valley Solar Farm	Consolidated Edison Development Inc.	Paicines, CA	272 GWh	Dec 2017	Dec 2025	Solar
Alta Wind XI	Alta Wind XI, LLC	Mojave, CA	269 GWh	Dec 2013	Dec 2024	Wind
Hatchet Ridge Wind Project	Pattern Operators LP	Burney, CA	268 GWh	Nov 2010	Dec 2024	Wind
Exchequer	Merced Irrigation District	Snelling, CA	268 GWh	Jun 1967	Dec 2024	Water
Maverick Solar 4, LLC	Maverick Solar 4, LLC	Desert Center, CA	266 GWh	Nov 2020	Dec 2025	Solar
Shiloh III Wind Project LLC	EDF Renewable Asset Holdings, Inc.	Birds Landing, CA	265 GWh	Nov 2011	Dec 2024	Wind
Imperial Solar Energy Center South	CSOLAR IV South LLC	Calexico, CA	264 GWh	Oct 2013	Dec 2024	Solar
Sunshine Valley Solar	EDP Renewables North America LLC	Armagosa, NV	264 GWh	Nov 2019	Dec 2025	Solar
Antelope Expansion 2	AES Distributed Energy	Lancaster, CA	264 GWh	Nov 2018	Dec 2025	Solar
Windstar 1	Nextera Energy Resources	Tehachapi, CA	263 GWh	Jan 2012	Dec 2024	Wind
Catalina Solar LLC	EDF Renewable Asset Holdings, Inc.	Rosamond, CA	262 GWh	Nov 2012	Dec 2024	Solar
CA Flats Solar 130, LLC	California Flats Solar 130, LLC	Shandon, CA	262 GWh	Oct 2017	Dec 2025	Solar
Salinas River Cogeneration	Salinas River Cogeneration Co	San Ardo, CA	262 GWh	Oct 1991	Dec 2025	Natural Gas
Rising Tree Wind Farm III	Rising Tree Wind Farm III LLC	Mojave, CA	261 GWh	May 2015	Dec 2024	Wind
Big Creek 2A	Southern California Edison Co	Auberry, CA	259 GWh	Jul 1928	Dec 2025	Water
Maverick Solar 6, LLC	Maverick Solar 6, LLC	Desert Center, CA	258 GWh	Oct 2021	Dec 2025	Solar
Quinto Solar PV Project	Arevon Energy, Inc.	Gustine, CA	257 GWh	Oct 2015	Dec 2024	Solar
AES Redondo Beach LLC	AES Redondo Beach LLC	Redondo Beach, CA	256 GWh	Sep 1954	Dec 2023	Natural Gas
Resurgence Solar	Resurgence Solar	Boron, CA	253 GWh	Jul 2023	Dec 2025	Solar
Willow Spring Solar, LLC	Willow Spring Solar LLC	Rosamond, CA	251 GWh	Dec 2018	Dec 2025	Solar
Rising Tree Wind Farm	Rising Tree Wind Farm LLC	Mojave, CA	249 GWh	Dec 2014	Dec 2024	Wind
Golden Hills Wind	Golden Hills Wind, LLC	Livermore, CA	247 GWh	Nov 2015	Dec 2024	Wind
Argus Cogen Plant	Searles Valley Minerals Operations Inc.	Trona, CA	247 GWh	Nov 1947	Dec 2025	Bituminous Coal : 95.0% Natural Gas : 5.0%
Rabbitbrush Solar, LLC	Leeward Asset Management, LLC	Rosamond, CA	246 GWh	Sep 2022	Dec 2025	Solar
Sky River Wind Energy Center	Sky River Wind LLC	Tehachapi, CA	245 GWh	Jan 1991	Dec 2024	Wind

Surrounding Balancing Authorities

Rank	Balancing Authority	Annual Net Generation	# Power Plants
#26	Arizona Public Service Company	24.1 TWh	92
#55	Arlington Valley, LLC	3.0 TWh	1
#37	Balancing Authority of Northern California	14.4 TWh	87
#48	Imperial Irrigation District	6.4 TWh	66
#31	Los Angeles Department of Water and Power	18.3 TWh	124
#22	Nevada Power Company	37.3 TWh	139
#64	New Harquahala Generating Company, LLC	107.5 GWh	1
#19	Salt River Project Agricultural Improvement and Power District	60.3 TWh	48
#57	Turlock Irrigation District	2.0 TWh	11
#39	Western Area Power Administration - Desert Southwest Region	10.0 TWh	33

Balancing Authorities with Similar Net Generation

Rank	Balancing Authority	Annual Net Generation	# Power Plants
#3	Electric Reliability Council of Texas, Inc.	484.9 TWh	1,313
#5	Southwest Power Pool	300.1 TWh	835
#6	Southern Company Services, Inc. - Trans	250.9 TWh	417
#7	California Independent System Operator	179.9 TWh	2,075
#9	Tennessee Valley Authority	162.4 TWh	204
#10	Florida Power & Light Co.	150.5 TWh	187
#12	New York Independent System Operator	134.0 TWh	1,211
#13	Duke Energy Carolinas	112.4 TWh	565
#15	ISO New England	110.5 TWh	1,577
#16	Bonneville Power Administration	85.9 TWh	163