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
| Plant Name | Utility | Location | Annual Generation | Plant Date | Last Update | Fuel Types |
|---|---|---|---|---|---|---|
| Zonneveld Oak Grove | Renewable Solar, Inc | Laton, CA | 388 MWh | May 2024 | Dec 2025 | Solar |
| Chula Vista Energy Center | Wellhead Services, Inc | Chula Vista, CA | 387 MWh | Apr 2001 | Oct 2025 | Natural Gas |
| Mountain View Ind Park 1-sline001 | Prologis Logistics Services Incorporated | Fontana, CA | 371 MWh | Aug 2023 | Dec 2025 | Solar |
| CA - Amazon - SMF6 | Forefront Power, LLC | Sacramento, CA | 361 MWh | Sep 2025 | Dec 2025 | Solar |
| Verizon Comms Garage Top Solar Project | Verizon Communications | San Jose, CA | 348 MWh | Aug 2025 | Jun 2025 | Solar |
| SF Southeast Cogen Plant | City & County of San Francisco - (CA) | San Francisco, CA | 341 MWh | May 2002 | Dec 2025 | Other Biomass Gas |
| Walnut Unified School District Walnut HS | Tesla Inc. | Walnut, CA | 327 MWh | Jan 2020 | Jun 2025 | Solar |
| Allied Potato | Renewable Solar, Inc | Bakersfield, CA | 310 MWh | Apr 2025 | Dec 2025 | Solar |
| Ellwood | Ellwood Power, LLC | Goleta, CA | 305 MWh | Jul 1974 | Dec 2025 | Natural Gas |
| Sutter Home Winery Westside | REC SHW, LLC | Lodi, CA | 295 MWh | Sep 2025 | Dec 2025 | Solar |
| SC 1 Data Center, Phase 2 | Xeres Ventures LLC | Santa Clara, CA | 267 MWh | Aug 2011 | Jul 2026 | Distillate Fuel Oil |
| Hellyer Solar Farm | County of Santa Clara - (CA) | San Jose, CA | 241 MWh | Jul 2017 | Dec 2025 | Solar |
| Zero Waste Energy Development Co LLC | Zero Waste Energy Development Company LLC | San Jose, CA | 224 MWh | Jan 2015 | Dec 2025 | Other Biomass Gas |
| Tracy 18 - SLCVA418 | Prologis Logistics Services Incorporated | Tracy, CA | 182 MWh | Sep 2025 | Dec 2025 | Solar |
| CA-Ventura County CCD-Ventura College | Forefront Power, LLC | Ventura, CA | 145 MWh | Nov 2025 | Dec 2025 | Solar |
| Chatsworth Industrial Center 1-SLLAX601 | Prologis Logistics Services Incorporated | Chatsworth, CA | 132 MWh | Sep 2025 | Dec 2025 | Solar |
| Oroville Cogeneration, LLC | Apex Power Generation Corp. | Oroville, CA | 116 MWh | Dec 1989 | Dec 2025 | Natural Gas |
| CA Manteca 730 Spreckels Ave | Catalyze Manteca 730 Spreckels Avenue Microgrid LLC | Manteca, CA | 100 MWh | Aug 2024 | Dec 2025 | Solar |
| Conflitti Solar | CES Electron Farm One, LLC | Firebaugh, CA | 100 MWh | - | Dec 2025 | Solar |
| Bishop Ranch - BR 15-DD | Alcosta Boulevard BR 15-DD Solar Project 2020, LLC | San Ramon, CA | 62 MWh | Feb 2025 | May 2025 | Solar |
| Kern Co Sheriff | TotalEnergies Renewables USA LLC | Bakersfield, CA | 56 MWh | Jul 2025 | Dec 2025 | Solar |
| H. Gonzales | City of Vernon - (CA) | Vernon, CA | 29 MWh | Dec 1986 | Dec 2025 | Natural Gas |
| Five Points Pipeline | Maas Energy Works | Riverdale, CA | 22 MWh | Nov 2025 | Dec 2025 | Solar |
| Spaulding 2 | Pacific Gas & Electric Co. | Emigrant Gap, CA | 21 MWh | Jun 1928 | Nov 2025 | Water |
| Improvement Dst No. 4 | Kern County Water Agency - (CA) | Bakersfield, CA | 12 MWh | Dec 2008 | Dec 2024 | Solar |
| Transamerica Pyramid | Transamerica Pyramid Properties LLC | San Francisco, CA | 4 MWh | Jun 2007 | Dec 2025 | Natural Gas |
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 |