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
Lockhart Solar PV II	Terra-Gen Operating Co-Solar	Hinkley, CA	203 GWh	Jun 2023	Jul 2026	Solar
Pinyon Pine II	Pinyon Pines Wind II, LLC	Mojave, CA	204 GWh	Oct 2012	Dec 2025	Wind
Kern River Eastridge Cogen	Chevron USA Inc	Bakersfield, CA	211 GWh	May 1988	Jul 2026	Natural Gas
W E Warne	California Dept. of Water Resources	Gorman, CA	211 GWh	Oct 1982	Dec 2025	Water
Pit 5	Pacific Gas & Electric Co.	Big Bend, CA	211 GWh	Mar 1944	Jul 2026	Water
Sky River Wind Energy Center	Sky River Wind LLC	Tehachapi, CA	211 GWh	Jan 1991	Dec 2025	Wind
Antelope Expansion 2	AES Distributed Energy	Lancaster, CA	214 GWh	Nov 2018	Jul 2026	Solar
High Winds LLC	FPLE High Winds, LLC	Birds Landing, CA	214 GWh	Jun 2003	Dec 2025	Wind
Tiger Creek	Pacific Gas & Electric Co.	Pioneer, CA	216 GWh	May 1931	Dec 2025	Water
Point Wind	Terra-Gen Operating Co-Wind	Tehachapi, CA	218 GWh	Feb 2021	Jul 2026	Wind
Alta Wind VIII	Nextera Energy Resources	Mojave, CA	219 GWh	Dec 2011	Dec 2025	Wind
Willow Spring Solar, LLC	Willow Spring Solar LLC	Rosamond, CA	220 GWh	Dec 2018	Jul 2026	Solar
RE Mustang LLC	MN8 Energy LLC	Lemoore, CA	221 GWh	Jul 2016	Dec 2025	Solar
Oasis Wind	Terra-Gen Operating Co-Wind	Mojave, CA	221 GWh	Nov 2004	Dec 2025	Wind
University of California San Diego Hybri	University of California San Diego	La Jolla, CA	227 GWh	Jun 2001	Jul 2026	Natural Gas
Desert Harvest, LLC	Desert Harvest, LLC	Desert Center, CA	230 GWh	Nov 2020	Jul 2026	Solar
Maverick Solar 6, LLC	Maverick Solar 6, LLC	Desert Center, CA	233 GWh	Oct 2021	Jul 2026	Solar
Donnells	Oakdale&South San Joaquin Irrigation D.	None, CA	233 GWh	May 1957	Dec 2025	Water
Vasco Winds	Vasco Winds, LLC	Livermore, CA	234 GWh	Nov 2011	Oct 2025	Wind
Ivanpah 2	NRG Energy Services	Nipton, CA	234 GWh	Nov 2013	Jul 2026	Solar : 98.0% Natural Gas : 2.0%
Coso Energy Developers	Coso Operating Co LLC	Inyokern, CA	235 GWh	Nov 1988	Dec 2025	Geothermal
Lockhart Solar PV, LLC	Terra-Gen Operating Co-Solar	Hinkley, CA	236 GWh	Nov 1989	Jul 2026	Solar
CD4	CD4	Mammoth Lakes, CA	236 GWh	Jun 2022	Dec 2025	Geothermal
Valero Refinery Cogeneration Unit 1	Valero Refining Co California	Benicia, CA	237 GWh	Sep 2002	Feb 2026	Natural Gas : 85.2% Other Gas : 14.8%
Resurgence Solar	Resurgence Solar	Boron, CA	241 GWh	Jul 2023	Jul 2026	Solar
Quinto Solar PV Project	Arevon Energy, Inc.	Gustine, CA	243 GWh	Oct 2015	Dec 2025	Solar
Panoche Valley Solar Farm	RWE Clean Energy	Paicines, CA	243 GWh	Dec 2017	Jul 2026	Solar
Brea Expansion Plant	Brea Power II	Brea, CA	243 GWh	Oct 2012	Jul 2026	Landfill Gas
New-Indy Ontario Mill	New-Indy Ontario LLC	Ontario, CA	244 GWh	May 1985	Jul 2026	Natural Gas
Exchequer	Merced Irrigation District	Snelling, CA	246 GWh	Jun 1967	Dec 2025	Water
Sunshine Valley Solar	EDP Renewables North America LLC	Armagosa, NV	246 GWh	Nov 2019	Jul 2026	Solar
Mountain View I & II	AES Distributed Energy	North Palm Springs, CA	248 GWh	May 2001	Jul 2026	Wind
Mesquite Solar 2, LLC	RWE Clean Energy	Tonopah, AZ	248 GWh	Nov 2016	Jul 2026	Solar
Sandrini Solar 100	EDPR CA Solar Park II LLC	Mettler, CA	248 GWh	Nov 2024	Jul 2026	Solar
Copper Mountain Solar 4, LLC	RWE Clean Energy	Boulder City, NV	248 GWh	Aug 2016	Dec 2025	Solar
Rising Tree Wind Farm	Rising Tree Wind Farm LLC	Mojave, CA	250 GWh	Dec 2014	Dec 2025	Wind
Rabbitbrush Solar, LLC	Leeward Asset Management, LLC	Rosamond, CA	250 GWh	Sep 2022	Jul 2026	Solar
Alta Wind XI	Alta Wind XI, LLC	Mojave, CA	251 GWh	Dec 2013	Dec 2025	Wind
Imperial Solar Energy Center South	CSOLAR IV South LLC	Calexico, CA	251 GWh	Oct 2013	Dec 2025	Solar
Golden Hills Wind	Golden Hills Wind, LLC	Livermore, CA	253 GWh	Nov 2015	Dec 2025	Wind
Alta Wind Energy Center V	Alta Wind V, LLC	Mojave, CA	254 GWh	Mar 2011	Dec 2025	Wind
Windstar 1	Nextera Energy Resources	Tehachapi, CA	255 GWh	Jan 2012	Dec 2025	Wind
Pit 1	Pacific Gas & Electric Co.	Burney, CA	256 GWh	Aug 1922	Dec 2025	Water
Salinas River Cogeneration	Salinas River Cogeneration Co	San Ardo, CA	256 GWh	Oct 1991	Jul 2026	Natural Gas
Electra	Pacific Gas & Electric Co.	Jackson, CA	257 GWh	May 1948	Jul 2026	Water
CA Flats Solar 130, LLC	California Flats Solar 130, LLC	Shandon, CA	258 GWh	Oct 2017	Jul 2026	Solar
Rising Tree Wind Farm III	Rising Tree Wind Farm III LLC	Mojave, CA	260 GWh	May 2015	Dec 2025	Wind
Pit 6	Pacific Gas & Electric Co.	Montgomery Creek, CA	262 GWh	Jul 1965	Dec 2025	Water
US Borax	U S Borax Inc	Boron, CA	263 GWh	Jun 1984	Jul 2026	Natural Gas
Catalina Solar LLC	EDF Renewable Asset Holdings, Inc.	Rosamond, CA	265 GWh	Nov 2012	Nov 2025	Solar
Valentine Solar, LLC	EDF Renewable Asset Holdings, Inc.	Rosamond, CA	267 GWh	Oct 2019	Jul 2026	Solar
Mustang Hills LLC	Mustang Hills, LLC (Longroad)	Mojave, CA	267 GWh	Apr 2012	Dec 2025	Wind
Wistaria Ranch Solar	RWE Clean Energy	Calexico, CA	268 GWh	Nov 2018	Jul 2026	Solar
American Kings Solar, LLC	MN8 Energy LLC	Lemoore, CA	271 GWh	Nov 2020	Jul 2026	Solar
Hatchet Ridge Wind Project	Pattern Operators LP	Burney, CA	271 GWh	Nov 2010	Dec 2025	Wind
Caribou 1	Pacific Gas & Electric Co.	Belden, CA	276 GWh	May 1921	Dec 2025	Water
Malburg	City of Vernon - (CA)	Vernon, CA	281 GWh	Sep 2005	Jul 2026	Natural Gas
CA Flats Solar 150, LLC	Arevon Energy, Inc.	Shandon, CA	282 GWh	Jan 2019	Jul 2026	Solar
Shiloh III Wind Project LLC	EDF Renewable Asset Holdings, Inc.	Birds Landing, CA	282 GWh	Nov 2011	Dec 2025	Wind
Pinyon Pine I	Pinyon Pines Wind I, LLC	Mojave, CA	283 GWh	Oct 2012	Dec 2025	Wind
Blythe Solar 110, LLC	Blythe Solar 110, LLC	Blythe, CA	284 GWh	Feb 2016	Dec 2025	Solar
Hudson - High Desert Hybrid	MN8 Energy LLC	Victorville, CA	289 GWh	Nov 2021	Jul 2026	Solar
Edwards Sanborn E2	Terra-Gen Operating Co-Hybrid	Mojave, CA	289 GWh	Nov 2021	Jul 2026	Solar
Wheelabrator Shasta	Shasta Sustainable Resource Management, Inc.	Anderson, CA	290 GWh	Sep 1987	Jul 2026	Wood/Wood Waste Solids
Campo Verde Solar	Southern Power Co	El Centro, CA	293 GWh	Sep 2013	Dec 2025	Solar
Shiloh IV Wind Project LLC	EDF Renewable Asset Holdings, Inc.	Birds Landing, CA	293 GWh	Nov 2012	Dec 2025	Wind
Maverick Solar 4, LLC	Maverick Solar 4, LLC	Desert Center, CA	294 GWh	Nov 2020	Jul 2026	Solar
Pacific Wind LLC	EDF Renewable Asset Holdings, Inc.	Rosamond, CA	295 GWh	Jul 2012	Dec 2025	Wind
Edwards Sanborn 1C	Terra-Gen Operating Co-Hybrid	Mojave, CA	296 GWh	Oct 2025	Jul 2026	Solar
Baldy Mesa Solar & Storage	AES Clean Energy	Adelanto, CA	299 GWh	Apr 2024	Jul 2026	Solar
Ralston	Placer County Water Agency - (CA)	Foresthill, CA	303 GWh	Sep 1966	Dec 2025	Water
Sun Streams 2	Sun Streams 2, LLC	Hassayampa, AZ	303 GWh	May 2021	Jul 2026	Solar
Moccasin	City & County of San Francisco - (CA)	Moccasin, CA	305 GWh	Jul 1969	Jul 2026	Water
Drew Solar LLC	Drew Solar LLC	Calexico, CA	306 GWh	Oct 2022	Jul 2026	Solar
Geothermal 1	Northern California Power Agny	Middletown, CA	307 GWh	Dec 1982	Jul 2026	Geothermal
Thermalito	California Dept. of Water Resources	Oroville, CA	309 GWh	Jan 1968	Jul 2026	Water
Humboldt Bay	Pacific Gas & Electric Co.	Eureka, CA	312 GWh	Aug 2010	Jul 2026	Natural Gas : 99.4% Distillate Fuel Oil : 0.6%
Maverick Solar, LLC	Maverick Solar, LLC	Desert Center, CA	312 GWh	Nov 2020	Jul 2026	Solar
Edwards Sanborn E1A	Terra-Gen Operating Co-Hybrid	Mojave, CA	313 GWh	Jul 2022	Jul 2026	Solar
Coso Power Developers	Coso Operating Co LLC	Inyokern, CA	316 GWh	Oct 1989	Jul 2026	Geothermal
Alta Wind Energy Center II	Alta Wind II, LLC	Mojave, CA	318 GWh	Dec 2010	Dec 2025	Wind
Alta Wind Energy Center III	Alta Wind III, LLC	Mojave, CA	318 GWh	Jan 2011	Dec 2025	Wind
BigBeau Solar, LLC	Big Beau Solar, LLC	Rosamond, CA	323 GWh	Jan 2022	Jul 2026	Solar
Geothermal 2	Northern California Power Agny	Middletown, CA	324 GWh	Nov 1985	Jul 2026	Geothermal
Blythe Solar II, LLC	Blythe Solar II, LLC	Blythe, CA	325 GWh	Jun 2016	Jul 2026	Solar
Big Creek 2A	Southern California Edison Co	Auberry, CA	325 GWh	Jul 1928	Jul 2026	Water
Arlington Energy Center III	Arlington Energy Center III	Blythe, CA	330 GWh	Jul 2022	Jul 2026	Solar
Edwards Sanborn E4	Terra-Gen Operating Co-Hybrid	Mojave, CA	331 GWh	Nov 2022	Jul 2026	Solar
Voyager Wind I	Terra-Gen Operating Co-Wind	Mojave, CA	332 GWh	Nov 2019	Jul 2026	Wind
Pine Flat	Kings River Conservation Dist	Piedra, CA	333 GWh	Dec 1983	Jul 2026	Water
Blythe Solar IV, LLC	Blythe Solar IV, LLC	Blythe, CA	334 GWh	Oct 2020	Jul 2026	Solar
Sun Streams, LLC	EDP Renewables North America LLC	Arlington, AZ	336 GWh	Dec 2019	Jul 2026	Solar
Fifth Standard Solar PV, LLC (Hybrid)	RWE Clean Energy	Huron, CA	338 GWh	Aug 2023	Jul 2026	Solar
Cresta	Pacific Gas & Electric Co.	Storrie, CA	342 GWh	Oct 1949	Dec 2025	Water
Balch 2	Pacific Gas & Electric Co.	Balch Camp, CA	342 GWh	Oct 1958	Dec 2025	Water
Pit 4	Pacific Gas & Electric Co.	Big Bend, CA	342 GWh	Jun 1955	Jul 2026	Water
Blythe Solar III, LLC Hybrid	Blythe Solar III, LLC	Blythe, CA	343 GWh	Apr 2020	Jul 2026	Solar
Tule Wind LLC	Avangrid Power LLC	Boulevard, CA	346 GWh	Nov 2017	Jul 2026	Wind
Edwards Sanborn E1B	Terra-Gen Operating Co-Hybrid	Mojave, CA	349 GWh	Oct 2022	Jul 2026	Solar
Raceway Solar & Storage	AES Clean Energy	Lancaster, CA	352 GWh	Apr 2024	Jul 2026	Solar

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