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	Jul 2026
Annual Generation	169.4 TWh
Power Plants	2,135
Utilities	988
Ranked #7 out of 64 in terms of net annual generation
Ranked #12 out of 53 in terms of annual generation from natural gas
Power Plant Types	Natural Gas \| 34% Solar \| 30% Water \| 12.4% Wind \| 11.3% Nuclear \| 11%

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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
Butte College Main Campus Solar	Butte-Glenn Community College District	Oroville, CA	7 GWh	Jun 2011	Dec 2025	Solar
Foundation ST	Foundation HA Energy Generation, LLC	Tracy, CA	2 GWh	May 2011	Dec 2025	Wind
Temescal Canyon RV, LLC	Temescal Canyon RV, LLC	Corona, CA	2 GWh	Apr 2011	Dec 2025	Solar
SDCWA - Twin Oaks	CleanCapital Holdings	San Marcos, CA	2 GWh	Apr 2011	Dec 2025	Solar
Alta Wind Energy Center IV	Alta Wind IV, LLC	Mojave, CA	168 GWh	Mar 2011	Dec 2025	Wind
Alta Wind Energy Center V	Alta Wind V, LLC	Mojave, CA	254 GWh	Mar 2011	Dec 2025	Wind
Alta Wind Energy Center III	Alta Wind III, LLC	Mojave, CA	318 GWh	Jan 2011	Dec 2025	Wind
SDCCD - Miramar	CleanCapital Holdings	San Diego, CA	1 GWh	Jan 2011	Dec 2025	Solar
Alta Wind Energy Center I	Alta Wind I, LLC	Mojave, CA	400 GWh	Dec 2010	Dec 2025	Wind
Alta Wind Energy Center II	Alta Wind II, LLC	Mojave, CA	318 GWh	Dec 2010	Dec 2025	Wind
Colusa Generating Station	Pacific Gas & Electric Co.	Maxwell, CA	2 TWh	Nov 2010	May 2026	Natural Gas
Hatchet Ridge Wind Project	Pattern Operators LP	Burney, CA	271 GWh	Nov 2010	Dec 2025	Wind
Meridian Vineyards	CVI CleanCapital Solar 1 LLC	Paso Robles, CA	1 GWh	Nov 2010	Dec 2024	Solar
Monterey Regional Water Pollution Contro	Tesla Inc.	Marina, CA	1 GWh	Nov 2010	Dec 2025	Solar
Ameresco Chiquita Canyon	AMERESCO Chiquita Canyon LLC	Castaic, CA	2 GWh	Oct 2010	Dec 2024	Landfill Gas
FPL Energy Montezuma Winds LLC	FPL Energy Montezuma Wind	Birds Landing, CA	96 GWh	Oct 2010	Dec 2025	Wind
Caltech Central	Bloom Energy 2009 PPA	Pasadena, CA	8 GWh	Oct 2010	Dec 2025	Natural Gas
City of Hayward WWTP	City of Hayward (CA)	Hayward, CA	11 GWh	Oct 2010	Dec 2025	Other Biomass Gas : 72.3% Solar : 23.6% Natural Gas : 4.1%
Teichert Materials-Teichert Vernalis	Foundation HA Energy Generation, LLC	San Joaquin, CA	2 GWh	Sep 2010	Dec 2025	Wind
CSUF Trigeneration	California State University at Fullerton	Fullerton, CA	35 GWh	Sep 2010	May 2026	Natural Gas : 81.4% Solar : 18.6%
Humboldt Bay	Pacific Gas & Electric Co.	Eureka, CA	320 GWh	Aug 2010	May 2026	Natural Gas : 99.6%
Sunset Reservoir North Basin	Duke Energy Renewables Services	San Francisco, CA	6 GWh	Aug 2010	Dec 2025	Solar
Castle Rock Vineyards	Castle Rock Cooling	Delano, CA	2 GWh	Aug 2010	Oct 2025	Solar
FRV SI Transport Solar LP	FRV SI Transport Solar, L.P. (Sacremento)	Sacramento, CA	1 GWh	Jul 2010	Dec 2025	Solar
Calabasas Gas to Energy Facility	Los Angeles County Sanitation	Agoura, CA	32 GWh	Jun 2010	Dec 2025	Landfill Gas
Orange Grove Peaking Facility	Orange Grove Energy LP	Pala, CA	9 GWh	May 2010	Dec 2025	Natural Gas
El Cajon Energy Center	Wellhead Services, Inc	El Cajon, CA	20 GWh	May 2010	Dec 2025	Natural Gas
CM48	RWE Clean Energy	Boulder City, NV	90 GWh	May 2010	Dec 2025	Solar
CalRenew-1	CalRenew-1 LLC	Mendota, CA	2 GWh	Mar 2010	Dec 2025	Solar
High Sierra Cogeneration Plant	Plumas Sierra Rural Electric Coop	Susanville, CA	33 GWh	Jan 2010	Dec 2025	Natural Gas
Solar Blythe LLC	NRG Solar Blythe	Blythe, CA	39 GWh	Nov 2009	Dec 2025	Solar
Vaca Dixon Solar Station	Pacific Gas & Electric Co.	Vacaville, CA	3 GWh	Nov 2009	Dec 2025	Solar
Santa Cruz Energy	Santa Cruz Energy LLC	Santa Cruz, CA	9 GWh	Oct 2009	Dec 2025	Landfill Gas
Otay Mesa Generating Project	Otay Mesa Energy Center LLC	San Diego, CA	1 TWh	Sep 2009	May 2026	Natural Gas
SunEdison Procter & Gamble Oxnard	SunE U6 Holdings LLC	Oxnard, CA	2 GWh	Sep 2009	Dec 2025	Solar
Broadway 3 - UC Merced 1	MN8 Energy LLC	Merced, CA	929 MWh	Sep 2009	Dec 2025	Solar
City of Madera WWTP	SunE GIL1, LLC	Madera, CA	2 GWh	Aug 2009	Dec 2025	Solar
Palo Verde College	Scale Sustainable I, LLC	Blythe, CA	2 GWh	Jul 2009	Dec 2024	Solar
Ameresco Keller Canyon	AMERESCO Keller Canyon LLC	Bay Point, CA	16 GWh	Jun 2009	Dec 2025	Landfill Gas
Panoche Energy Center	Panoche Energy Center, LLC	Firebaugh, CA	652 GWh	May 2009	May 2026	Natural Gas
Garnet Wind Energy Center	Terra-Gen Operating Co-Wind	North Palm Springs, CA	17 GWh	May 2009	Dec 2025	Wind
Midway Peaking LLC	CalPeak Power, LLC	Firebaugh, CA	6 GWh	Apr 2009	Dec 2025	Natural Gas
RE-VFO LLC	RE-VFO LLC	Visalia, CA	2 GWh	Apr 2009	Dec 2025	Solar
SunEdison Walmart Apple Valley DC	SunE M5 Holdings LLC	Apple Valley, CA	715 MWh	Feb 2009	Nov 2025	Solar
Staples La Mirada, CA	SunE WF3-ST Holdings, LLC	La Mirada, CA	1 GWh	Feb 2009	Dec 2025	Solar
G2 Energy Ostrom Road LLC	G2 Energy LLC	Wheatland, CA	28 GWh	Jan 2009	Dec 2025	Landfill Gas
ASTI	SunStrong Management, LLC	Cloverdale, CA	1 GWh	Jan 2009	Dec 2025	Solar
Elkhorn Dairy	Bravo REC Management LLC	Visalia, CA	1 GWh	Jan 2009	Dec 2025	Solar
Gateway Generating Station	Pacific Gas & Electric Co.	Antioch, CA	3 TWh	Dec 2008	May 2026	Natural Gas
Shiloh Wind Project 2 LLC	EDF Renewable Asset Holdings, Inc.	Birds Landing, CA	369 GWh	Dec 2008	Dec 2025	Wind
Improvement Dst No. 4	Kern County Water Agency - (CA)	Bakersfield, CA	12 MWh	Dec 2008	Dec 2024	Solar
Beringer	SunStrong Management, LLC	Saint Helena, CA	2 GWh	Dec 2008	Dec 2025	Solar
Ameresco Ox Mountain	AMERESCO Ox Mountain Energy LLC	Half Moon Bay, CA	81 GWh	Nov 2008	May 2026	Landfill Gas
CM10	RWE Clean Energy	Boulder City, NV	18 GWh	Nov 2008	Dec 2025	Solar
SunEdison Anheuser Busch Fairfield	SunE M5 Holdings LLC	Fairfield, CA	1 GWh	Nov 2008	Dec 2025	Solar
Univ of California San Diego Solar	University of California San Diego	La Jolla, CA	4 GWh	Nov 2008	Dec 2025	Solar
Encina Water Pollution Control	Encina Joint Powers Authority	Carlsbad, CA	14 GWh	Oct 2008	May 2026	Other Biomass Gas : 94.1% Natural Gas : 5.9%
Mariani Packing Vacaville Solar	SunE U6 Holdings LLC	Vacaville, CA	586 MWh	Oct 2008	Dec 2025	Solar
Kaweah Delta District Hospital	Kaweah Delta Hospital	Visalia, CA	22 GWh	Sep 2008	May 2026	Natural Gas
Gap Pacific Distribution Center	MN8 Energy LLC	Fresno, CA	5 GWh	Sep 2008	Dec 2025	Solar
Edom Hills Project 1 LLC	Edom Hills Project 1 LLC	Cathedral City, CA	5 GWh	Aug 2008	Jun 2025	Wind
SunEdison Ironwood State Prison	SunE CPA CDC2 LLC	Blythe, CA	1 GWh	Apr 2008	Dec 2025	Solar
Robert O Schulz Solar Farm	South San Joaquin Irr District	Oakdale, CA	4 GWh	Apr 2008	Dec 2025	Solar
Broadridge Cogen	Broadridge Customer Communications	El Dorado Hills, CA	16 GWh	Apr 2008	Dec 2024	Natural Gas : 91.9% Solar : 8.1%
Dillon Wind LLC	Avangrid Power LLC	North Palm Springs, CA	138 GWh	Mar 2008	Dec 2025	Wind
CSU Fresno Solar Project	MMA Fresno Power LP	Fresno, CA	1 GWh	Nov 2007	Dec 2025	Solar
Algonquin Power Sanger LLC	Clearlight Energy Sanger LLC	Sanger, CA	4 GWh	Nov 2007	May 2026	Natural Gas
Kohls San Bernardino Solar Facility	SunE WF3 KHL A Holdings, LLC	San Bernardino, CA	1 GWh	Oct 2007	Dec 2025	Solar
Grapeland Hybrid	Southern California Edison Co	Rancho Cucamonga, CA	2 GWh	Aug 2007	Dec 2025	Natural Gas
Mira Loma Peaker	Southern California Edison Co	Ontario, CA	1 GWh	Aug 2007	Dec 2025	Natural Gas
Barre Peaker	Southern California Edison Co	Stanton, CA	5 GWh	Aug 2007	Dec 2025	Natural Gas
Center Hybrid	Southern California Edison Co	Norwalk, CA	2 GWh	Aug 2007	Dec 2025	Natural Gas
SunEdison Walgreens Moreno Valley	SunE WG113 Moreno Valley LLC	Moreno Valley, CA	599 MWh	Aug 2007	Dec 2025	Solar
Walgreens Woodland Distribution Center	SunE WG45 Woodland LLC	Woodland, CA	432 MWh	Jul 2007	Dec 2025	Solar
UCI Facilities Management Central Plant	University of California Irvine	Irvine, CA	114 GWh	Jun 2007	May 2026	Natural Gas
Transamerica Pyramid	Transamerica Pyramid Properties LLC	San Francisco, CA	4 MWh	Jun 2007	Dec 2025	Natural Gas
Energy Center	University of Redlands	Redlands, CA	4 GWh	Jan 2007	Dec 2025	Natural Gas
Buena Vista Energy LLC	Leeward Asset Management, LLC	Byron, CA	96 GWh	Nov 2006	Dec 2025	Wind
Hoag Hospital Cogen Plant	Hoag Memorial Presbyterian Hospital	Newport Beach, CA	28 GWh	Jun 2006	May 2026	Natural Gas
Riverside Energy Resource Center	City of Riverside - (CA)	Riverside, CA	17 GWh	May 2006	Dec 2025	Natural Gas
Chuckawalla Valley State Prison	SunE CPA CDC1 LLC	Blythe, CA	502 MWh	May 2006	Dec 2025	Solar
Shiloh I Wind Project	Avangrid Power LLC	Rio Vista, CA	400 GWh	Apr 2006	Dec 2025	Wind
Ameresco Santa Cruz Energy	AMERESCO Santa Cruz Energy LLC	Watsonville, CA	14 GWh	Dec 2005	Dec 2025	Landfill Gas
Mountainview Generating Station	Southern California Edison Co	Redlands, CA	1 TWh	Nov 2005	May 2026	Natural Gas
Kumeyaay Wind	Leeward Asset Management, LLC	Campo, CA	131 GWh	Nov 2005	Dec 2025	Wind
Palomar Energy	San Diego Gas & Electric Co	Escondido, CA	1 TWh	Sep 2005	May 2026	Natural Gas
Malburg	City of Vernon - (CA)	Vernon, CA	291 GWh	Sep 2005	May 2026	Natural Gas
Malaga Power LLC	CalPeak Power, LLC	Fresno, CA	4 GWh	Aug 2005	May 2026	Natural Gas
W Plant	Qualcomm Incorporated	San Diego, CA	18 GWh	Jun 2005	May 2026	Natural Gas
Metcalf Energy Center	Calpine Corp - Metcalf Energy Center	San Jose, CA	2 TWh	May 2005	May 2026	Natural Gas
Miramar Energy Facility	San Diego Gas & Electric Co	San Diego, CA	11 GWh	May 2005	May 2026	Natural Gas
Coram Energy LLC (ECT)	Nextera Energy Resources	Tehachapi, CA	22 GWh	Apr 2005	Dec 2025	Wind
Pastoria Energy Facility, LLC	Calpine Corp - Pastoria Energy Center	Lebec, CA	3 TWh	Apr 2005	May 2026	Natural Gas
Sierra Nevada Brewing Co Hybrid	Sierra Nevada Brewing Co	Chico, CA	11 GWh	Apr 2005	Dec 2025	Natural Gas : 65.7% Solar : 19.5% Other Biomass Gas : 14.9%
Donald Von Raesfeld Power Plant	City of Santa Clara - (CA)	Santa Clara, CA	874 GWh	Feb 2005	May 2026	Natural Gas
Clearwater Power Plant	City of Riverside - (CA)	Corona, CA	4 GWh	Feb 2005	Dec 2025	Natural Gas
Coram Energy LLC	Nextera Energy Resources	Tehachapi, CA	9 GWh	Dec 2004	Dec 2025	Wind
Bear Valley Power Plant	Bear Valley Electric Service	Big Bear Lake, CA	2 GWh	Dec 2004	Dec 2025	Natural Gas
Diablo Winds LLC	Sequitur Renewables, LLC	Livermore, CA	31 GWh	Nov 2004	Dec 2025	Wind
Oasis Wind	Terra-Gen Operating Co-Wind	Mojave, CA	221 GWh	Nov 2004	Dec 2025	Wind

Surrounding Balancing Authorities

Rank	Balancing Authority	Annual Net Generation	# Power Plants
#25	Arizona Public Service Company	25.2 TWh	100
#54	Arlington Valley, LLC	3.2 TWh	1
#38	Balancing Authority of Northern California	13.7 TWh	90
#49	Imperial Irrigation District	6.2 TWh	66
#29	Los Angeles Department of Water and Power	18.8 TWh	131
#22	Nevada Power Company	36.8 TWh	143
#51	PUD No. 1 of Douglas County	4.4 TWh	4
#19	Salt River Project Agricultural Improvement and Power District	60.3 TWh	49
#57	Turlock Irrigation District	1.9 TWh	11
#40	Western Area Power Administration - Desert Southwest Region	10.4 TWh	34

Balancing Authorities with Similar Net Generation

Rank	Balancing Authority	Annual Net Generation	# Power Plants
#3	Electric Reliability Council of Texas, Inc.	494.1 TWh	1,471
#5	Southwest Power Pool	306.8 TWh	856
#6	Southern Company Services, Inc. - Trans	253.5 TWh	422
#7	California Independent System Operator	169.4 TWh	2,135
#9	Tennessee Valley Authority	163.4 TWh	207
#10	Florida Power & Light Co.	152.2 TWh	187
#12	New York Independent System Operator	134.3 TWh	1,299
#13	Duke Energy Carolinas	112.6 TWh	577
#15	ISO New England	111.1 TWh	1,629
#16	Bonneville Power Administration	91.6 TWh	167