| Heckel Vegetation Management | Amarillo | Visit site |
| HeliosAltas™ | Anna | Visit site |
| Helix Earth | Houston | Visit site |
| Henderson Building Solutions | Dallas | Visit site |
| Henderson Building Solutions | Houston | Visit site |
| HENRY ADAMS, LLC | San Antonio | Visit site |
| Hephae Energy Technology | Spring | Visit site |
| HESOLAR | Buda | · |
| High Ground Energy | Burleson | Visit site |
| Hilltop Concrete | Flint | Visit site |
| Hilltop Concrete | · | Visit site |
| Hitech Digital Solutions | Austin | Visit site |
| Holland Land Resources | Fort Worth | Visit site |
| Holland Land Resources | Midland | Visit site |
| Holland Land Resources | Houston | Visit site |
| Holland Land Resources | Austin | Visit site |
| Hollaway Environmental + Communications Services, Inc. | Houston | Visit site |
| Hollaway Environmental + Communications Services, Inc. | San Antonio | Visit site |
| HOLT Renewables | Austin | Visit site |
| Horizontal Technology, Inc. | Hockley | Visit site |
| Hoss Solar Resources, LLC | Fort Worth | Visit site |
| Hynamics | Paris | Visit site |
| IADYS | Houston | Visit site |
| IES Energy Solutions | San Antonio | Visit site |
| ignis H2 Energy Inc. | Houston | Visit site |
| Ilios Integrators | Houston | Visit site |
| ImagineSolar | Austin | Visit site |
| Immediate Solar | Richardson | Visit site |
| iMPACT Sustainables | Dallas | Visit site |
| Industrial Sun | Austin | Visit site |
| Innovative Solar Utility | Austin | Visit site |
| INTECH Automation & Intelligence | Houston | Visit site |
| IntegrateSun | Houston | Visit site |
| International Wind | Houston | · |
| Interstate Batteries | Dallas | · |
| JERA Americas | Houston | Visit site |
| JIS energy | Houston | Visit site |
| Jomar Electrical Contractors | Houston | Visit site |
| Jomar Electrical Contractors | Lubbock | Visit site |
| Jomar Electrical Contractors | Midland | Visit site |
| Jomar Electrical Contractors | Austin | Visit site |
| Jupiter Power | Austin | Visit site |
| Kaizen Clean Energy | League City | Visit site |
| Kanin Energy | Houston | Visit site |
| Koolboks | Paris | Visit site |
| Kraft Solergy | McAllen | Visit site |
| Kratos Solar Power | League City | · |
| KWRE | Austin | Visit site |
| KWRE | Cedar Park | Visit site |
| KWRE | Conroe | Visit site |
| KWRE | Prosper | Visit site |
| Kyma Consulting | Austin | Visit site |
| LA Solar Group | Dallas | Visit site |
| Lancium | Shenandoah | · |
| Landmark Structures | Southlake | Visit site |
| Last Energy | Austin | Visit site |
| LEAF Engineers | Houston | Visit site |
| Letsos Company | Houston | Visit site |
| Levona Renewables | Plano | Visit site |
| LF Bioenergy | Dallas | · |
| Life Cycle Power | Jersey Village | Visit site |
| Lighthouse Solar Austin | Austin | · |
| Links Energy Partners | Houston | Visit site |
| Links Energy Partners | Dallas | Visit site |
| LND Technical Services, LLC | Houston | Visit site |
| Lonestar Solar Services | Houston | · |
| Longhorn Solar, Inc. | Pflugerville | · |
| Loring Consulting Engineers, Inc. | Houston | Visit site |
| Love Our Solar | Bryan | Visit site |
| M3 Design | Round Rock | Visit site |
| Manhattan Solar Partners | Midland | Visit site |
| MARS Transformers, LLC | Pearland | Visit site |
| MARS Transformers, LLC | Houston | Visit site |
| Mass Power | Houston | · |
| Maverick Power | McKinney | Visit site |
| MBA Energy & Industrial | Magnolia | Visit site |
| McDermott International, Ltd | Houston | Visit site |
| MCF Solar LLC | Lufkin | Visit site |
| MEP Green Design & Build, PLLC | Houston | Visit site |
| Merit SI | Houston | Visit site |
| Microgrid Accelerator Inc. | Dallas | Visit site |
| Micross Components | Round Rock | Visit site |
| MLN Company | Stafford | Visit site |
| Moative | Houston | Visit site |
| Modern Brokers of America | The Woodlands | Visit site |
| Molen Services Inc | Austin | · |
| Moss & Associates (Construction) | · | Visit site |
| MountainStar Solar | El Paso | Visit site |
| MS Directional | Conroe | Visit site |
| MS Directional | Midland | Visit site |
| Mustang Extreme Environmental Services | Fort Worth | Visit site |
| NATiVE Solar | Dripping Springs | · |
| Natura Resources | Abilene | Visit site |
| Navigate Power | McKinney | Visit site |
| Neamine | Paris | · |
| Nergon Energy Service | Melissa | · |
| New Energy Blue, LLC | Port Lavaca | Visit site |
| NextGen Solar LLC | Arlington | Visit site |
| Nexus Renewable Power, LLC | Plano | Visit site |
| Nivo Solar | Houston | Visit site |
| Noahlex Power | Fort Worth | Visit site |
| NOCEnergy | Houston | · |
| Nordic Wind Group | Houston | · |
| North Texas Solar | Grapevine | Visit site |
| NOV | Houston | Visit site |
| NOVA Electronic Materials, LLC | Flower Mound | Visit site |
| Nyati Services, Inc. | Corpus Christi | Visit site |
| Ocean Infinity | Austin | Visit site |
| OCI Energy | San Antonio | Visit site |
| OmniOn Power | Plano | · |
| Omnitron Sensors | · | Visit site |
| One80 Solar | San Antonio | · |
| Optimum Academy | Amarillo | Visit site |
| Optimum Rope Access Solutions | Amarillo | Visit site |
| Optiv Energy | Dallas | Visit site |
| Origis Energy Services | Austin | Visit site |
| Outflier | Paris | Visit site |
| Oxan Energy | Paris | Visit site |
| Panelmatic, Inc. | Houston | Visit site |
| Partner Engineering & Science, Inc. | Austin | Visit site |
| Partner Engineering & Science, Inc. | Houston | Visit site |
| Partner Engineering & Science, Inc. | Plano | Visit site |
| Pharos Marine Automatic Power | Houston | Visit site |
| Phillips 66 | Houston | Visit site |
| Photons Solar | El Paso | Visit site |
| Pileworks | Magnolia | Visit site |
| Pirate Wind Turbines | San Antonio | Visit site |
| Power Up Texas | Austin | Visit site |
| Powermatic Associates | Georgetown | Visit site |
| Powertron India | Austin | Visit site |
| Premium Solar Patios | Dallas | · |
| Primoris Services Corporation | Dallas | Visit site |
| Priority Power | The Woodlands | Visit site |
| Priority Power | Arlington | Visit site |
| Prism Electric | Garland | Visit site |
| Prismecs | Houston | Visit site |
| Pro Solar, LLC | Austin | Visit site |
| PROCTEK | Midland | Visit site |
| Pronto Solutions Inc. | Weatherford | Visit site |
| PROPWR | Midland | Visit site |
| Purple Land Management | Fort Worth | Visit site |
| PVinsight Inc. | Plano | Visit site |
| PVinsight Inc. | Irving | Visit site |
| Quaise Energy | Avery | Visit site |
| Quality Solar | Plano | Visit site |
| Quanta Infrastructure Solutions Group | Houston | Visit site |
| Quanta Services, Inc. | Houston | Visit site |
| Quantum Generative Materials (GenMat) | Austin | Visit site |
| Raion | Richardson | Visit site |
| Rangel Renewables | Cypress | · |