| RavenVolt Inc, An ABM Company | Woodway | Visit site |
| RDS Solar | Dallas | Visit site |
| RectorSeal | Houston | Visit site |
| Remove and Replace Solar | Austin | Visit site |
| Renewable Energy Institute: Advancing #RenewableEnergy and #RenewableFuel since 2007 | Austin | Visit site |
| RenewBridge | Houston | · |
| Rhythm Energy | League City | · |
| RNWBL® | League City | · |
| Rogers Mechanical Contractors | Mansfield | Visit site |
| Rogue Energy Ventures | League City | Visit site |
| roofio | San Antonio | Visit site |
| RoviSys | Houston | Visit site |
| ROYPOW Global | Georgetown | Visit site |
| RPT | Houston | Visit site |
| RRC Companies | Round Rock | Visit site |
| Run Energy | Abilene | · |
| SAT Energy | San Antonio | · |
| Satoshi Energy | Houston | Visit site |
| Savage Wind Power, LLC | Dallas | Visit site |
| Scalo | Austin | Visit site |
| SCF Partners | Houston | · |
| Sec Power | Houston | Visit site |
| SEG Sparkstone | Humble | Visit site |
| SEG Sparkstone | San Antonio | Visit site |
| Shah Smith & Associates, Inc. | Houston | Visit site |
| Shyft Power Solutions | Houston | Visit site |
| Sieyuan Electric USA LLC | Plano | Visit site |
| Signal Energy | Houston | Visit site |
| SignaTech Solar | Sulphur Springs | Visit site |
| Signature Solar | Sulphur Springs | Visit site |
| Silicon Labs | Austin | Visit site |
| Simplicity Power | Dallas | Visit site |
| Sirius PV | Brookshire | Visit site |
| Sky Community Solar | San Antonio | Visit site |
| Solar 360 | South Padre Island | Visit site |
| Solar 76 | Commerce | Visit site |
| Solar DQD | Roma | Visit site |
| Solar Engine Solutions | Dallas | Visit site |
| Solar Heroes | Austin | Visit site |
| Solar Royal, LLC | Austin | · |
| Solar Vista | San Antonio | · |
| Solarfuel USA | Dallas | Visit site |
| Solidion Technology Inc. (NASDAQ: $STI) | Dallas | Visit site |
| SOLTUGA - Energias Renováveis | Point | Visit site |
| Solvent Energy | Austin | Visit site |
| South Texas Solar Systems, Inc. | San Antonio | · |
| Southwest Research Institute | San Antonio | Visit site |
| Spark Solar | Cleburne | Visit site |
| Spruce PRO, powered by Spruce | Houston | · |
| SRS Distribution Inc. | McKinney | Visit site |
| Sun Action Trackers | San Antonio | Visit site |
| Sunbelt Solomon | Temple | Visit site |
| Sunbelt Solomon | Conroe | Visit site |
| Sunbelt Solomon | La Porte | Visit site |
| SunCheck | Austin | Visit site |
| SunCoast Land Services, Inc. | Houston | Visit site |
| Sunflower Solar Solutions | McKinney | Visit site |
| Sunhook | Laredo | Visit site |
| Sunlight Batteries USA | Lewisville | Visit site |
| Sunnova Energy | Houston | · |
| SUNRGY Solar Distribution | Missouri City | Visit site |
| SUNRGY Solar Distribution | Dallas | Visit site |
| Sunshine Renewable Solutions | Houston | Visit site |
| SunStripe | Irving | Visit site |
| SunStrong Management | Austin | · |
| Syensqo Oil & Gas Solutions | The Woodlands | Visit site |
| Talen Energy | Houston | Visit site |
| Taurus | Pasadena | Visit site |
| Team-1 Academy | Coppell | · |
| Technip Energies | Paris | · |
| TerraFlow Energy | Bellville | Visit site |
| Tethys Robotics | Alton | Visit site |
| Texas Best Solar | Denton | Visit site |
| Texas General Land Office | Austin | Visit site |
| Texas Instruments | Dallas | Visit site |
| Texas Power Inspections | Dallas | Visit site |
| TexasFile | Corpus Christi | Visit site |
| TGS | Houston | Visit site |
| The Hiller Companies | Houston | Visit site |
| The Lubbock Solar Energy Company | Lubbock | · |
| Thinkpower | The Woodlands | Visit site |
| Third Pillar Solar | Houston | Visit site |
| Tierra Climate | Houston | Visit site |
| Titan Production Equipment, LLC | Spring | Visit site |
| Titan Production Equipment, LLC | The Woodlands | Visit site |
| Titan Production Equipment, LLC | Alleyton | Visit site |
| Titan Production Equipment, LLC | Columbus | Visit site |
| Titan Solar Sales | Dallas | Visit site |
| Titus Low Carbon Ventures | Fort Worth | Visit site |
| Tomorrow Energy | Houston | Visit site |
| Toshiba International Corporation | Houston | Visit site |
| Transect | San Antonio | Visit site |
| Trident Structures | Fort Worth | Visit site |
| Trina Solar Manufacturing Module 1 | Wilmer | Visit site |
| TriSMART Solar | Houston | · |
| True Texas Solar & Roofing | Conroe | Visit site |
| True Texas Solar & Roofing | Willis | Visit site |
| Ttago Tech | Dallas | · |
| TurnKey Logistics | Houston | · |
| Tyndale Company, Inc. | · | Visit site |
| Tyndale Company, Inc. | Midland | Visit site |
| Tyndale Company, Inc. | Houston | Visit site |
| Tyndale Company, Inc. | Deer Park | Visit site |
| Unified Energy Services | Houston | Visit site |
| Unimacts Global | Houston | Visit site |
| Universal-Power | Coppell | Visit site |
| Upower | Austin | · |
| Uptown Solar | Houston | · |
| Urban Grid | Houston | Visit site |
| US Modules | College Station | Visit site |
| Validere | Houston | Visit site |
| Vector Power | Plano | Visit site |
| Vector Power | Rosharon | Visit site |
| Velocys | Houston | Visit site |
| Vema Hydrogen | Houston | Visit site |
| Verde Subsea | Houston | Visit site |
| Veriforce | The Woodlands | Visit site |
| Vesper Energy | Dallas | · |
| VesselPro Fabrication | Waller | Visit site |
| Veteran Owned Solar | League City | · |
| Viper Solar | Austin | · |
| Voltabox | Cedar Park | · |
| Vytl Controls Group | The Woodlands | Visit site |
| Waaree Solar Americas Inc. | Brookshire | Visit site |
| Walter P Moore | Houston | Visit site |
| WASKEY | Houston | Visit site |
| Wellflex Energy Solutions | White Settlement | Visit site |
| Wellflex Energy Solutions | Fort Worth | Visit site |
| Wells Solar & Electrical Services | Austin | Visit site |
| Western Land Services, Inc. | Midland | Visit site |
| Wheelhouse Land & Field Services, LLC | Weatherford | Visit site |
| Whirlwind Steel Buildings | Houston | Visit site |
| Woodville Pellets | Woodville | Visit site |
| Woodville Pellets | Port Arthur | Visit site |
| Worldwide Mission Critical | Plano | Visit site |
| WR Transformateurs | Tomball | Visit site |
| Wylie Engineering | Houston | Visit site |
| Zenith Solar | Dallas | · |
| Zolarzo | Houston | Visit site |
| Samtracs (RBPC 24) | San Antonio | Visit site |
| All Inclusive Energy LLC | Pasadena | Visit site |
| Brindley Engineering Corporation | Houston | Visit site |
| DMSolar | League City | Visit site |
| Energy Renovation Center | Arlington | · |
| Expert Solar TX | Houston | Visit site |
| Family Solar Company | Weatherford | Visit site |
| Five Star Metals Inc | Houston | Visit site |
| FORTIS Alliance | Houston | Visit site |
| Galveston LNG Bunker Port | Houston | Visit site |
| Galveston LNG Bunker Port | Texas City | Visit site |