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
Big Creek 1	Southern California Edison Co	Big Creek, CA	409 GWh	Oct 1913	Dec 2025	Water
Collierville Powerhouse	Northern California Power Agny	Murphys, CA	407 GWh	Oct 1989	Jul 2026	Water
Blythe Energy Inc	AltaGas Blythe Operations Inc	Blythe, CA	407 GWh	Nov 2003	Jul 2026	Natural Gas
Big Creek 4	Southern California Edison Co	North Fork, CA	404 GWh	May 1951	Jul 2026	Water
Shiloh I Wind Project	Avangrid Power LLC	Rio Vista, CA	400 GWh	Apr 2006	Dec 2025	Wind
Alta Wind Energy Center I	Alta Wind I, LLC	Mojave, CA	400 GWh	Dec 2010	Dec 2025	Wind
Chaparral Springs	Leeward Asset Management, LLC	Rosamond, CA	399 GWh	Mar 2025	Jul 2026	Solar
Maverick Solar 7, LLC	Maverick Solar 7, LLC	Desert Center, CA	397 GWh	Nov 2021	Jul 2026	Solar
Mesquite Solar 1	RWE Clean Energy	Tonopah, AZ	392 GWh	Oct 2011	Dec 2025	Solar
Wright Solar Park	Wright Solar Park LLC	Los Banos, CA	386 GWh	Nov 2019	Jul 2026	Solar
Solar Gen 2 Solar Facility	Southern Power Co	Calipatria, CA	377 GWh	Oct 2014	Dec 2025	Solar
Big Creek 2	Southern California Edison Co	Auberry, CA	377 GWh	Nov 1913	Dec 2025	Water
Pit 3	Pacific Gas & Electric Co.	Burney, CA	375 GWh	Jun 1925	Dec 2025	Water
Mustang Two	RE Mustang Two LLC	Lemoore, CA	373 GWh	Oct 2020	Apr 2026	Solar
Shiloh Wind Project 2 LLC	EDF Renewable Asset Holdings, Inc.	Birds Landing, CA	369 GWh	Dec 2008	Dec 2025	Wind
Luna Valley	Luna Valley Solar I, LLC	Mendota, CA	369 GWh	Jul 2025	Jul 2026	Solar
Scarlet II Hybrid	EDPR Scarlet II LLC	Cantua Creek, CA	369 GWh	Nov 2024	Jul 2026	Solar
Pit 7	Pacific Gas & Electric Co.	Montgomery Creek, CA	366 GWh	Aug 1965	Jul 2026	Water
North Sky River Energy LLC	North Sky River Energy LLC	Weldon, CA	365 GWh	Nov 2012	Dec 2025	Wind
Alta Wind X	Alta Wind X, LLC	Mojave, CA	361 GWh	Dec 2013	Dec 2025	Wind
North Rosamond Solar LLC	North Rosamond Solar, LLC	Rosamond, CA	361 GWh	May 2019	Jul 2026	Solar
Chestnut	Chestnut Westside LLC	Lemoore, CA	360 GWh	Nov 2023	Jul 2026	Solar
Mount Signal Solar Farm II	MN8 Energy LLC	Calexico, CA	358 GWh	Dec 2019	Jul 2026	Solar
Coso Finance Partners	Coso Operating Co LLC	Inyokern, CA	357 GWh	Jun 1987	Jul 2026	Geothermal
Imperial Solar Energy Center West	CSOLAR IV West LLC	Seeley, CA	357 GWh	Mar 2016	Dec 2025	Solar
Stockton Biomass	DTE Stockton LLC	Stockton, CA	355 GWh	Nov 1987	Dec 2025	Wood/Wood Waste Solids : 99.6%
Raceway Solar & Storage	AES Clean Energy	Lancaster, CA	352 GWh	Apr 2024	Jul 2026	Solar
Edwards Sanborn E1B	Terra-Gen Operating Co-Hybrid	Mojave, CA	349 GWh	Oct 2022	Jul 2026	Solar
Tule Wind LLC	Avangrid Power LLC	Boulevard, CA	346 GWh	Nov 2017	Jul 2026	Wind
Blythe Solar III, LLC Hybrid	Blythe Solar III, LLC	Blythe, CA	343 GWh	Apr 2020	Jul 2026	Solar
Pit 4	Pacific Gas & Electric Co.	Big Bend, CA	342 GWh	Jun 1955	Jul 2026	Water
Balch 2	Pacific Gas & Electric Co.	Balch Camp, CA	342 GWh	Oct 1958	Dec 2025	Water
Cresta	Pacific Gas & Electric Co.	Storrie, CA	342 GWh	Oct 1949	Dec 2025	Water
Fifth Standard Solar PV, LLC (Hybrid)	RWE Clean Energy	Huron, CA	338 GWh	Aug 2023	Jul 2026	Solar
Sun Streams, LLC	EDP Renewables North America LLC	Arlington, AZ	336 GWh	Dec 2019	Jul 2026	Solar
Blythe Solar IV, LLC	Blythe Solar IV, LLC	Blythe, CA	334 GWh	Oct 2020	Jul 2026	Solar
Pine Flat	Kings River Conservation Dist	Piedra, CA	333 GWh	Dec 1983	Jul 2026	Water
Voyager Wind I	Terra-Gen Operating Co-Wind	Mojave, CA	332 GWh	Nov 2019	Jul 2026	Wind
Edwards Sanborn E4	Terra-Gen Operating Co-Hybrid	Mojave, CA	331 GWh	Nov 2022	Jul 2026	Solar
Arlington Energy Center III	Arlington Energy Center III	Blythe, CA	330 GWh	Jul 2022	Jul 2026	Solar
Big Creek 2A	Southern California Edison Co	Auberry, CA	325 GWh	Jul 1928	Jul 2026	Water
Blythe Solar II, LLC	Blythe Solar II, LLC	Blythe, CA	325 GWh	Jun 2016	Jul 2026	Solar
Geothermal 2	Northern California Power Agny	Middletown, CA	324 GWh	Nov 1985	Jul 2026	Geothermal
BigBeau Solar, LLC	Big Beau Solar, LLC	Rosamond, CA	323 GWh	Jan 2022	Jul 2026	Solar
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
Coso Power Developers	Coso Operating Co LLC	Inyokern, CA	316 GWh	Oct 1989	Jul 2026	Geothermal
Edwards Sanborn E1A	Terra-Gen Operating Co-Hybrid	Mojave, CA	313 GWh	Jul 2022	Jul 2026	Solar
Maverick Solar, LLC	Maverick Solar, LLC	Desert Center, CA	312 GWh	Nov 2020	Jul 2026	Solar
Humboldt Bay	Pacific Gas & Electric Co.	Eureka, CA	312 GWh	Aug 2010	Jul 2026	Natural Gas : 99.4% Distillate Fuel Oil : 0.6%
Thermalito	California Dept. of Water Resources	Oroville, CA	309 GWh	Jan 1968	Jul 2026	Water
Geothermal 1	Northern California Power Agny	Middletown, CA	307 GWh	Dec 1982	Jul 2026	Geothermal
Drew Solar LLC	Drew Solar LLC	Calexico, CA	306 GWh	Oct 2022	Jul 2026	Solar
Moccasin	City & County of San Francisco - (CA)	Moccasin, CA	305 GWh	Jul 1969	Jul 2026	Water
Sun Streams 2	Sun Streams 2, LLC	Hassayampa, AZ	303 GWh	May 2021	Jul 2026	Solar
Ralston	Placer County Water Agency - (CA)	Foresthill, CA	303 GWh	Sep 1966	Dec 2025	Water
Baldy Mesa Solar & Storage	AES Clean Energy	Adelanto, CA	299 GWh	Apr 2024	Jul 2026	Solar
Edwards Sanborn 1C	Terra-Gen Operating Co-Hybrid	Mojave, CA	296 GWh	Oct 2025	Jul 2026	Solar
Pacific Wind LLC	EDF Renewable Asset Holdings, Inc.	Rosamond, CA	295 GWh	Jul 2012	Dec 2025	Wind
Maverick Solar 4, LLC	Maverick Solar 4, LLC	Desert Center, CA	294 GWh	Nov 2020	Jul 2026	Solar
Shiloh IV Wind Project LLC	EDF Renewable Asset Holdings, Inc.	Birds Landing, CA	293 GWh	Nov 2012	Dec 2025	Wind
Campo Verde Solar	Southern Power Co	El Centro, CA	293 GWh	Sep 2013	Dec 2025	Solar
Wheelabrator Shasta	Shasta Sustainable Resource Management, Inc.	Anderson, CA	290 GWh	Sep 1987	Jul 2026	Wood/Wood Waste Solids
Edwards Sanborn E2	Terra-Gen Operating Co-Hybrid	Mojave, CA	289 GWh	Nov 2021	Jul 2026	Solar
Hudson - High Desert Hybrid	MN8 Energy LLC	Victorville, CA	289 GWh	Nov 2021	Jul 2026	Solar
Blythe Solar 110, LLC	Blythe Solar 110, LLC	Blythe, CA	284 GWh	Feb 2016	Dec 2025	Solar
Pinyon Pine I	Pinyon Pines Wind I, LLC	Mojave, CA	283 GWh	Oct 2012	Dec 2025	Wind
Shiloh III Wind Project LLC	EDF Renewable Asset Holdings, Inc.	Birds Landing, CA	282 GWh	Nov 2011	Dec 2025	Wind
CA Flats Solar 150, LLC	Arevon Energy, Inc.	Shandon, CA	282 GWh	Jan 2019	Jul 2026	Solar
Malburg	City of Vernon - (CA)	Vernon, CA	281 GWh	Sep 2005	Jul 2026	Natural Gas
Caribou 1	Pacific Gas & Electric Co.	Belden, CA	276 GWh	May 1921	Dec 2025	Water
Hatchet Ridge Wind Project	Pattern Operators LP	Burney, CA	271 GWh	Nov 2010	Dec 2025	Wind
American Kings Solar, LLC	MN8 Energy LLC	Lemoore, CA	271 GWh	Nov 2020	Jul 2026	Solar
Wistaria Ranch Solar	RWE Clean Energy	Calexico, CA	268 GWh	Nov 2018	Jul 2026	Solar
Mustang Hills LLC	Mustang Hills, LLC (Longroad)	Mojave, CA	267 GWh	Apr 2012	Dec 2025	Wind
Valentine Solar, LLC	EDF Renewable Asset Holdings, Inc.	Rosamond, CA	267 GWh	Oct 2019	Jul 2026	Solar
Catalina Solar LLC	EDF Renewable Asset Holdings, Inc.	Rosamond, CA	265 GWh	Nov 2012	Nov 2025	Solar
US Borax	U S Borax Inc	Boron, CA	263 GWh	Jun 1984	Jul 2026	Natural Gas
Pit 6	Pacific Gas & Electric Co.	Montgomery Creek, CA	262 GWh	Jul 1965	Dec 2025	Water
Rising Tree Wind Farm III	Rising Tree Wind Farm III LLC	Mojave, CA	260 GWh	May 2015	Dec 2025	Wind
CA Flats Solar 130, LLC	California Flats Solar 130, LLC	Shandon, CA	258 GWh	Oct 2017	Jul 2026	Solar
Electra	Pacific Gas & Electric Co.	Jackson, CA	257 GWh	May 1948	Jul 2026	Water
Salinas River Cogeneration	Salinas River Cogeneration Co	San Ardo, CA	256 GWh	Oct 1991	Jul 2026	Natural Gas
Pit 1	Pacific Gas & Electric Co.	Burney, CA	256 GWh	Aug 1922	Dec 2025	Water
Windstar 1	Nextera Energy Resources	Tehachapi, CA	255 GWh	Jan 2012	Dec 2025	Wind
Alta Wind Energy Center V	Alta Wind V, LLC	Mojave, CA	254 GWh	Mar 2011	Dec 2025	Wind
Golden Hills Wind	Golden Hills Wind, LLC	Livermore, CA	253 GWh	Nov 2015	Dec 2025	Wind
Imperial Solar Energy Center South	CSOLAR IV South LLC	Calexico, CA	251 GWh	Oct 2013	Dec 2025	Solar
Alta Wind XI	Alta Wind XI, LLC	Mojave, CA	251 GWh	Dec 2013	Dec 2025	Wind
Rabbitbrush Solar, LLC	Leeward Asset Management, LLC	Rosamond, CA	250 GWh	Sep 2022	Jul 2026	Solar
Rising Tree Wind Farm	Rising Tree Wind Farm LLC	Mojave, CA	250 GWh	Dec 2014	Dec 2025	Wind
Copper Mountain Solar 4, LLC	RWE Clean Energy	Boulder City, NV	248 GWh	Aug 2016	Dec 2025	Solar
Sandrini Solar 100	EDPR CA Solar Park II LLC	Mettler, CA	248 GWh	Nov 2024	Jul 2026	Solar
Mesquite Solar 2, LLC	RWE Clean Energy	Tonopah, AZ	248 GWh	Nov 2016	Jul 2026	Solar
Mountain View I & II	AES Distributed Energy	North Palm Springs, CA	248 GWh	May 2001	Jul 2026	Wind
Sunshine Valley Solar	EDP Renewables North America LLC	Armagosa, NV	246 GWh	Nov 2019	Jul 2026	Solar
Exchequer	Merced Irrigation District	Snelling, CA	246 GWh	Jun 1967	Dec 2025	Water
New-Indy Ontario Mill	New-Indy Ontario LLC	Ontario, CA	244 GWh	May 1985	Jul 2026	Natural Gas
Brea Expansion Plant	Brea Power II	Brea, CA	243 GWh	Oct 2012	Jul 2026	Landfill Gas
Panoche Valley Solar Farm	RWE Clean Energy	Paicines, CA	243 GWh	Dec 2017	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