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
Blythe Solar IV, LLC	Blythe Solar IV, LLC	Blythe, CA	347 GWh	Oct 2020	Dec 2025	Solar
Blythe Solar III, LLC Hybrid	Blythe Solar III, LLC	Blythe, CA	355 GWh	Apr 2020	Dec 2025	Solar
Blythe Solar II, LLC	Blythe Solar II, LLC	Blythe, CA	337 GWh	Jun 2016	Dec 2025	Solar
Cuyama Solar, LLC	Cuyama Solar, LLC	Cuyama, CA	63 GWh	Oct 2017	Dec 2025	Solar
CA Flats Solar 150, LLC	Arevon Energy, Inc.	Shandon, CA	305 GWh	Jan 2019	Dec 2025	Solar
CA Flats Solar 130, LLC	California Flats Solar 130, LLC	Shandon, CA	262 GWh	Oct 2017	Dec 2025	Solar
RE Astoria 2	RE Astoria 2 LLC	Rosamond, CA	145 GWh	Nov 2016	Dec 2025	Solar
RE Astoria	RE Astoria LLC	Rosamond, CA	178 GWh	Nov 2016	Dec 2025	Solar
Elevation Solar C	AES Distributed Energy	Lancaster, CA	102 GWh	Nov 2016	Dec 2025	Solar
Great Valley Solar Portfolio Holdings, L	Consolidated Edison Development Inc.	Cantua Creek, CA	503 GWh	Nov 2017	Dec 2025	Solar
North Rosamond Solar LLC	North Rosamond Solar, LLC	Rosamond, CA	397 GWh	May 2019	Dec 2025	Solar
Desert Quartzite	Desert Quartzite LLC	Blythe, CA	823 GWh	Nov 2024	Dec 2025	Solar
Little Bear Solar 1, LLC	Little Bear Solar 1, LLC (Longroad)	Mendota, CA	63 GWh	Nov 2020	Dec 2025	Solar
Sunshine Valley Solar	EDP Renewables North America LLC	Armagosa, NV	264 GWh	Nov 2019	Dec 2025	Solar
Borden Solar Farm	41MB 8me, LLC	Madera, CA	113 GWh	May 2020	Dec 2025	Solar
Wright Solar Park	Wright Solar Park LLC	Los Banos, CA	403 GWh	Nov 2019	Dec 2025	Solar
Anheuser-Busch #2	Foundation HA Energy Generation, LLC	Fairfield, CA	4 GWh	Oct 2014	Dec 2025	Wind
Golden Acorn Casino	Foundation HA Energy Generation, LLC	Campo, CA	4 GWh	Jun 2014	Dec 2025	Wind
SC 1 Data Center, Phase 2	Xeres Ventures LLC	Santa Clara, CA	380 MWh	Aug 2011	Dec 2025	Distillate Fuel Oil
Carlsbad Energy Center	NRG California Peaker Operations LLC	Carlsbad, CA	216 GWh	Nov 2018	Dec 2025	Natural Gas
Silver State Solar Power South	Silver State Solar Power South, LLC	Primm Valley, NV	684 GWh	Oct 2015	Dec 2025	Solar
Sunshine Gas Producers	Sunshine Gas Producers LLC	Sylmar, CA	130 GWh	Jul 2014	Dec 2025	Landfill Gas
Solar Star 2	Solar Star California XX, LLC	Rosamond, CA	721 GWh	Feb 2014	Dec 2025	Solar
Solar Star 1	Solar Star California XIX, LLC	Rosamond, CA	897 GWh	Feb 2014	Dec 2025	Solar
C&H Sugar Plant	C&H Sugar Company Inc	Crockett, CA	42 GWh	Sep 1957	Dec 2025	Purchased Steam
Hoag Hospital Cogen Plant	Hoag Memorial Presbyterian Hospital	Newport Beach, CA	27 GWh	Jun 2006	Dec 2025	Natural Gas
Parnassus Central Utility Plant	University of California-San Francisco	San Francisco, CA	67 GWh	Dec 1995	Dec 2025	Natural Gas
CSUF Trigeneration	California State University at Fullerton	Fullerton, CA	37 GWh	Sep 2010	Dec 2025	Natural Gas : 82.3% Solar : 17.7%
Foundation Wal-Mart Red Bluff	Foundation CA Fund VI Manager LLC	Red Bluff, CA	2 GWh	Aug 2012	Dec 2025	Wind
Foundation Superior Farms	Foundation CA Fund VI Manager LLC	Dixon, CA	1 GWh	Nov 2012	Dec 2025	Wind
Kern Oil & Refining Co	Kern Oil & Refining Co	Bakersfield, CA	34 GWh	Sep 2002	Dec 2025	Natural Gas
Brea Expansion Plant	Brea Power II	Brea, CA	233 GWh	Oct 2012	Dec 2025	Landfill Gas
Lodi Energy Center	Northern California Power Agny	Lodi, CA	580 GWh	Oct 2012	Dec 2025	Natural Gas
Tule Wind LLC	Avangrid Power LLC	Boulevard, CA	365 GWh	Nov 2017	Dec 2025	Wind
El Segundo Energy Center LLC	NRG Energy Services LLC	El Segundo, CA	45 GWh	Jun 2013	Dec 2025	Natural Gas
Watkins Manufacturing Co.	Watkins Manufacturing Corporation	San Diego, CA	7 GWh	Oct 2001	Dec 2025	Natural Gas
Signal Hill West Unit	Signal Hill Petroleum, Inc	Signal Hill, CA	39 GWh	Jun 2004	Dec 2025	Other Gas
Topaz Solar Farm	Topaz Solar Farms LLC	Santa Margarita, CA	1 TWh	Mar 2013	Dec 2025	Solar
Oxnard Paper Mill	New-Indy, Oxnard LLC	Oxnard, CA	131 GWh	Feb 1986	Dec 2025	Natural Gas
University of California San Diego Hybri	University of California San Diego	La Jolla, CA	207 GWh	Jun 2001	Dec 2025	Natural Gas
CCCSD Wastewater Treatment Plnt	Central Contra Costa Sanitary District	Martinez, CA	20 GWh	Nov 1995	Dec 2025	Natural Gas
Algonquin Power Sanger LLC	Algonquin Power Sanger LLC	Sanger, CA	4 GWh	Nov 2007	Dec 2025	Natural Gas
Walnut Creek Energy Park	Walnut Creek LLC	Industry, CA	45 GWh	Mar 2013	Dec 2025	Natural Gas
Ocotillo Express LLC	Pattern Operators LP	Ocotillo, CA	435 GWh	Nov 2012	Dec 2025	Wind
Mariposa Energy Project	Diamond Generating Corporation	Byron, CA	29 GWh	Sep 2012	Dec 2025	Natural Gas
Sentinel Energy Center, LLC	Sentinel Energy Center LLC	Desert Hot Springs, CA	140 GWh	Apr 2013	Dec 2025	Natural Gas
Genesis Solar Energy Project	Genesis Solar LLC	Blythe, CA	608 GWh	Oct 2013	Dec 2025	Solar
AV Solar Ranch One	AV Solar Ranch 1 LLC	Lancaster, CA	565 GWh	Jul 2014	Dec 2025	Solar
Agua Caliente Solar Project	Agua Caliente Solar	Dateland, AZ	547 GWh	Apr 2012	Dec 2025	Solar
Panoche Valley Solar Farm	Consolidated Edison Development Inc.	Paicines, CA	272 GWh	Dec 2017	Dec 2025	Solar
Mojave Solar Project	Mojave Solar LLC	Hinkley, CA	590 GWh	Nov 2014	Dec 2025	Solar
Marsh Landing Generating Station	Marsh Landing LLC	Antioch, CA	16 GWh	Apr 2013	Dec 2025	Natural Gas
UCI Facilities Management Central Plant	University of California Irvine	Irvine, CA	113 GWh	Jun 2007	Dec 2025	Natural Gas
Ivanpah 3	NRG Energy Services	Nipton, CA	237 GWh	Nov 2013	Dec 2025	Solar : 96.4% Natural Gas : 3.6%
Ivanpah 1	NRG Energy Services	Nipton, CA	208 GWh	Nov 2013	Dec 2025	Solar : 96.3% Natural Gas : 3.7%
Ivanpah 2	NRG Energy Services	Nipton, CA	244 GWh	Nov 2013	Dec 2025	Solar : 95.6% Natural Gas : 4.4%
Canyon Power Plant	City of Anaheim - (CA)	Anaheim, CA	13 GWh	Jul 2011	Dec 2025	Natural Gas
Ameresco Ox Mountain	AMERESCO Ox Mountain Energy LLC	Half Moon Bay, CA	82 GWh	Nov 2008	Dec 2025	Landfill Gas
Panoche Energy Center	Panoche Energy Center, LLC	Firebaugh, CA	760 GWh	May 2009	Dec 2025	Natural Gas
Colusa Generating Station	Pacific Gas & Electric Co.	Maxwell, CA	3 TWh	Nov 2010	Dec 2025	Natural Gas
Gateway Generating Station	Pacific Gas & Electric Co.	Antioch, CA	3 TWh	Dec 2008	Dec 2025	Natural Gas
Russell City Energy Center	Russell City Energy Company LLC	Hayward, CA	2 TWh	Jul 2013	Dec 2025	Natural Gas
Malaga Power LLC	CalPeak Power, LLC	Fresno, CA	8 GWh	Aug 2005	Dec 2025	Natural Gas
Miramar Energy Facility	San Diego Gas & Electric Co	San Diego, CA	7 GWh	May 2005	Dec 2025	Natural Gas
SJ/SC WPCP	San Jose/Santa Clara Water P C	San Jose, CA	83 GWh	Jan 1953	Dec 2025	Natural Gas : 52.4% Other Biomass Gas : 47.5%
THUMS	THUMS Long Beach Company	Long Beach, CA	168 GWh	Dec 2002	Dec 2025	Natural Gas
Malburg	City of Vernon	Vernon, CA	310 GWh	Sep 2005	Dec 2025	Natural Gas
WWTP Power Generation Station	East Bay Municipal Util Dist	Oakland, CA	30 GWh	Jul 1985	Dec 2025	Other Biomass Gas : 99.0% Distillate Fuel Oil : 1.0%
Donald Von Raesfeld Power Plant	City of Santa Clara - (CA)	Santa Clara, CA	771 GWh	Feb 2005	Dec 2025	Natural Gas
Palomar Energy	San Diego Gas & Electric Co	Escondido, CA	1 TWh	Sep 2005	Dec 2025	Natural Gas
Elk Hills Cogen	California Resources Elk Hills LLC	Tupman, CA	23 GWh	Oct 1994	Dec 2025	Natural Gas
Tracy Combined Cycle Power Plant	MRP San Joaquin Energy LLC.	Tracy, CA	896 GWh	Mar 2003	Dec 2025	Natural Gas
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%
Los Esteros Critical Energy Center	Los Esteros Critical Energy Facility LLC	San Jose, CA	157 GWh	Jan 2003	Dec 2025	Natural Gas
Mountain View I & II	AES Distributed Energy	North Palm Springs, CA	275 GWh	May 2001	Dec 2025	Wind
Pastoria Energy Facility, LLC	Calpine Corp - Pastoria Energy Center	Lebec, CA	4 TWh	Apr 2005	Dec 2025	Natural Gas
High Desert Power Plant	MRP Generation Holdings, LLC	Victorville, CA	3 TWh	Mar 2003	Dec 2025	Natural Gas
Elk Hills Power LLC	Elk Hills Power LLC	Tupman, CA	3 TWh	Jun 2003	Dec 2025	Natural Gas
Metcalf Energy Center	Calpine Corp - Metcalf Energy Center	San Jose, CA	2 TWh	May 2005	Dec 2025	Natural Gas
Otay Mesa Generating Project	Otay Mesa Energy Center LLC	San Diego, CA	2 TWh	Sep 2009	Dec 2025	Natural Gas
Delta Energy Center	Delta Energy Center LLC	Pittsburg, CA	4 TWh	Apr 2002	Dec 2025	Natural Gas
Blythe Energy Inc	AltaGas Blythe Operations Inc	Blythe, CA	315 GWh	Nov 2003	Dec 2025	Natural Gas
Los Medanos Energy Center	Los Medanos Energy Center LLC	Pittsburg, CA	2 TWh	Jul 2001	Dec 2025	Natural Gas
Sunrise Power LLC	Sunrise Power Co LLC	Fellows, CA	2 TWh	May 2001	Dec 2025	Natural Gas
La Paloma Generating Plant	CXA La Paloma LLC	McKittrick, CA	2 TWh	Dec 2002	Dec 2025	Natural Gas
Crockett Cogen Project	Crockett Cogeneration	Crockett, CA	1 TWh	Nov 1995	Dec 2025	Natural Gas
Desert Star Energy Center	Desert Star Energy Center SDG&E	Boulder City, NV	375 GWh	Apr 2000	Dec 2025	Natural Gas
Martinez Refining	Martinez Refining Co	Martinez, CA	734 GWh	Oct 1995	Dec 2025	Natural Gas : 96.7% Other Gas : 3.3%
Saint Agnes Medical Center	Saint Agnes Medical Center	Fresno, CA	35 GWh	Apr 2001	Dec 2025	Natural Gas
Live Oak Limited	WCAC Operating Company	Bakersfield, CA	21 GWh	Feb 1992	Dec 2025	Natural Gas
Collierville Powerhouse	Northern California Power Agny	Murphys, CA	342 GWh	Oct 1989	Dec 2025	Water
Biola University Hybrid	Biola University	La Mirada, CA	13 GWh	Mar 1990	Dec 2025	Natural Gas
Midway Sunset Cogen	Midway-Sunset Cogeneration Co	Fellows, CA	47 GWh	Apr 1989	Dec 2025	Natural Gas
CP Kelco San Diego Plant	CP Kelco US Inc.	San Diego, CA	75 GWh	Sep 1983	Dec 2025	Natural Gas
Richmond Cogen	Chevron Products Company-Richmond	Richmond, CA	970 GWh	Jul 1992	Dec 2025	Natural Gas : 97.5% Other Gas : 2.5%
Kern River Eastridge Cogen	Chevron USA Inc	Bakersfield, CA	225 GWh	May 1988	Dec 2025	Natural Gas
Berry Placerita Cogen	Shadow Wolf Energy	Santa Clarita, CA	4 GWh	Feb 1990	Dec 2025	Natural Gas
Taft 26C Cogen	Chevron USA Inc	Taft, CA	43 GWh	Jun 1982	Dec 2025	Natural Gas
Dixie Valley	Ormat Nevada Inc	Fallon, NV	423 GWh	May 1988	Dec 2025	Geothermal
Naval Hospital Medical Center	Department of the Navy	San Diego, CA	23 GWh	Nov 2003	Dec 2025	Natural Gas

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