| Rosendin | Sacramento | Visit site |
| Rosendin | San Francisco | Visit site |
| SaaS Labs | Palo Alto | Visit site |
| Solarever USA | Lake Forest | Visit site |
| Sollega | San Francisco | Visit site |
| Sollega | San Bruno | Visit site |
| SOLV Energy | San Diego | Visit site |
| SPAN | Half Moon Bay | Visit site |
| STÄUBLI | Windsor | Visit site |
| SunCode Energy | Irvine | Visit site |
| SunMade Power | Sacramento | Visit site |
| Sunrun | San Francisco | Visit site |
| Terabase Energy | Berkeley | Visit site |
| The Solar Recycling Company | Santa Ana | Visit site |
| The Solar Recycling Company | Desert Hot Springs | Visit site |
| Thornova Solar | Fremont | Visit site |
| Thornova Solar | Milpitas | Visit site |
| Tigo Energy | Campbell | Visit site |
| Trimark Associates, Inc. | Folsom | Visit site |
| TW Power Line Construction, LLC | Roseville | Visit site |
| UNIGRID Battery | San Diego | Visit site |
| UtilityAPI | Oakland | Visit site |
| World4Solar | Culver City | Visit site |
| Xpanner. | Santa Fe Springs | Visit site |
| Yes Energy | Glendora | Visit site |
| 4 S.T.E.L. ENGINEERING, INC. | Mission Viejo | · |
| AMPS Solar | Oak Hills | · |
| Energy Solutions | Oakland | · |
| IronRidge - An Enstall Company | Hayward | Visit site |
| Mechatron Solar | Stockton | Visit site |
| SunGrid Solar | Fountain Valley | · |
| Vista Solar - a Centrica Business Solutions company | Santa Clara | · |
| 120 DEGREEZ MEP Engineering | San Diego | Visit site |
| 127 Energy | Napa | Visit site |
| 174 Power Global | Irvine | Visit site |
| 1st Light Energy Inc | Manteca | Visit site |
| 1UP SOLAR | San Diego | Visit site |
| 38 Degrees North | Sausalito | Visit site |
| 3Degrees Group, Inc. | San Francisco | Visit site |
| A-1 Contractors Inc. dba A-1 Electric | Visalia | · |
| A.M. Sun Solar & Roofing | Paso Robles | Visit site |
| Access Limited | Oceano | Visit site |
| Accessible Consulting Engineers, Inc. | Corona | Visit site |
| ACCO Engineered Systems | Pasadena | Visit site |
| ACE MEP Group, Inc. | Irvine | Visit site |
| ACOPower | Walnut | Visit site |
| ACR Solar & Home Services | Carmichael | Visit site |
| Activate | Berkeley | Visit site |
| Active Membranes | Moorpark | Visit site |
| Adapture Renewables, Inc. | Oakland | Visit site |
| Advanced Solar Cleaning | Truckee | Visit site |
| Advanced Solar Solutions | Bass Lake | Visit site |
| Advantek Waste Management Services LLC | Los Angeles | Visit site |
| Advent Technologies Holdings, Inc. | Livermore | Visit site |
| AEE Solar | Solar Equipment Distributor | San Luis Obispo | · |
| AESC, Inc. | Carlsbad | Visit site |
| AGreatE | Carlsbad | Visit site |
| AirMyne | South Lake Tahoe | Visit site |
| Airstreams Renewables, Inc. | Tehachapi | · |
| Akela Engineering & Consulting | San Diego | Visit site |
| Albat | Sacramento | Visit site |
| Alcen Renewable | Orange | · |
| AlfaTech | San Jose | Visit site |
| Allesun | Santa Clara | Visit site |
| Alliant Consulting, Inc. | San Diego | Visit site |
| Allied Universal | Irvine | Visit site |
| Allterra Solar | Santa Cruz | Visit site |
| Altamain Consulting | Felton | Visit site |
| Alvah Group, Inc. | Quincy | Visit site |
| Amber Kinetics | Union City | · |
| AME DESIGN GROUP INC. | Irvine | Visit site |
| AMECO Solar & Roofing | Studio City | Visit site |
| American Lithium Energy (ALE) | Carlsbad | Visit site |
| American Solar Company, LLC | Paso Robles | Visit site |
| American Solar Corporation | Sausalito | Visit site |
| American Solar Power Inc. | Los Angeles | Visit site |
| American Wiring, Inc | San Diego | Visit site |
| AMETEK IntelliPower, Inc. | Orange | Visit site |
| Ampacity | Monterey | · |
| Amprius Technologies, Inc. | Fremont | Visit site |
| AMPYR Energy USA | Long Beach | Visit site |
| Anode Technology Company | San Francisco | Visit site |
| Antigravity Batteries | Gardena | · |
| Antora Energy | San Jose | Visit site |
| ANYbotics | San Francisco | Visit site |
| Applied Ceramics | Fremont | Visit site |
| Apricot Solar | Lincoln | Visit site |
| APsmart MLRSD | Cupertino | Visit site |
| Aquila Energy, LLC | Vista | · |
| ARB Electrical | San Clemente | Visit site |
| Arbor Energy | Pasadena | Visit site |
| Arctech | Sacramento | Visit site |
| ArcTern Ventures | San Francisco | Visit site |
| Arkpax | Escondido | Visit site |
| Aro Homes | Sacramento | Visit site |
| At One Ventures | San Francisco | · |
| Avantus | San Diego | Visit site |
| AYS Solar Cleaning | Hayward | Visit site |
| Barnum & Celillo Electric, Inc. | Sacramento | Visit site |
| Baseload Power US | Palo Alto | Visit site |
| Battery Evo | Chatsworth | · |
| Bay Cities Paving & Grading, Inc. | Concord | Visit site |
| Bear Electrical Solutions LLC | San Jose | Visit site |
| Birds Eye Aerial Drones, LLC | El Cajon | Visit site |
| Bishangari Climate Intelligence LLC | San Jose | Visit site |
| Blue Current, Inc. | Hayward | Visit site |
| Blue Laser Fusion | Goleta | Visit site |
| BlueSky Utility - Powered by Nofar Energy | Novato | Visit site |
| Blumen | San Francisco | · |
| Boost VC | San Mateo | Visit site |
| BORGA | Fowler | Visit site |
| Bosley Electric Company | Santa Ana | Visit site |
| BPI | Oceanside | Visit site |
| Bragg Companies | Long Beach | Visit site |
| Bright Solar | Temecula | Visit site |
| BRIGHTMARK | San Francisco | Visit site |
| Bruce Entezam | Watsonville | Visit site |
| Butcher Power Products | Sacramento | Visit site |
| Butterfield Electric Inc. | Woodland | Visit site |
| BVI Solar | San Diego | Visit site |
| C2 Group - San Diego | San Diego | Visit site |
| C2 Group - San Diego | Sacramento | Visit site |
| Cadeo | Half Moon Bay | Visit site |
| Caelux® | Baldwin Park | · |
| Cal Microturbine | Costa Mesa | Visit site |
| Cal Solar Inc. | Los Angeles | Visit site |
| CalCom Energy | Fresno | Visit site |
| California Building Officials | Sacramento | Visit site |
| California Community Choice Association | Sacramento | Visit site |
| California Department of Forestry and Fire Protection (CAL FIRE) | Sacramento | Visit site |
| California Energy Commission | Sacramento | Visit site |
| California Governor's Office of Business and Economic Development (GO-Biz) | Sacramento | Visit site |
| California Public Utilities Commission | San Francisco | Visit site |
| Caltrans | Sacramento | Visit site |
| CalWave Inc. | Oakland | Visit site |
| Canopy Energy | Van Nuys | Visit site |
| Capitol Valley Electric | Sacramento | Visit site |
| Capstone Green Energy | Van Nuys | Visit site |
| Captura | Pasadena | Visit site |
| CelLink Corporation | San Carlos | Visit site |
| CenCal Solar, Inc. | Clovis | Visit site |
| Charge Bliss | Los Angeles | Visit site |
| ChargeNet Stations | Long Beach | Visit site |
| ChargePodX | Carson | Visit site |
| ChargerHelp | Los Angeles | Visit site |
| ChargeTronix | Costa Mesa | Visit site |
| ChargeWheel | Burlingame | Visit site |
| Chemix, Inc. | Sunnyvale | Visit site |
| Cinnamon Energy Systems | Los Gatos | Visit site |
| Citadel Roofing & Solar | Vacaville | Visit site |