Residential Microgrid
Systems in Texas.
Winter Storm Uri demonstrated a critical vulnerability: the ERCOT grid cannot import emergency power and is susceptible to cascading failure. Texas properties also face extreme summer heat waves, Gulf Coast hurricane exposure, and high electrical loads that strain an isolated grid. For high-value properties — especially rural estates and large primary residences — utility grid independence is not optional. It is essential infrastructure.
Request a Texas System ReviewThe Texas Grid Risk Profile
Texas is uniquely exposed to grid failure because ERCOT operates as an island — largely unable to import power from neighboring grids during emergencies. Combined with extreme weather events at both ends of the temperature spectrum, Texas represents one of the highest residential grid-risk profiles in the U.S.
For high-value Texas properties, this isn't a hypothetical — Uri happened. Harvey happened. The question is not whether the grid will fail again, but whether your property is prepared when it does.
How Texas Properties Change the Engineering
Texas grid risk spans both extremes — summer heat and winter freeze — which creates specific design requirements that differ from hurricane-only markets like Florida.
Uri exposed the risk of single-fuel dependency. We design systems with propane storage (less susceptible to supply disruption than natural gas) and solar recharging to reduce generator runtime.
Lithium battery capacity degrades in extreme cold. Texas installations use battery chemistries and thermal management rated for sub-freezing operation.
Texas summer HVAC loads are among the highest in the country. Systems are sized for peak summer demand — often the worst-case scenario for a heat event outage.
We manage all Oncor, CenterPoint, AEP Texas, and TNMP interconnection requirements and net metering applications for Texas properties.
Frequently Asked Questions
Who installs residential microgrids in Texas?
Residential microgrid installation in Texas requires licensed master electricians with expertise in battery systems, automatic transfer switching, generator integration, and ERCOT grid interconnection. The Texas market has many solar installers and generator dealers — but few firms with the engineering capability to design and install true whole-home microgrid systems. Prime Microgrid installs custom residential microgrid systems throughout Texas, including Houston, Dallas-Fort Worth, Austin, San Antonio, and surrounding regions.
What caused the Texas power grid failure in 2021?
Winter Storm Uri (February 2021) caused a catastrophic failure of the Texas ERCOT grid, leaving 4.5 million homes without power for days to weeks in subfreezing temperatures. The failure resulted from thermal generation plant failures due to inadequate weatherization, natural gas supply chain disruption, and ERCOT's islanded grid structure limiting import capacity from neighboring grids. The event killed hundreds of people and caused an estimated $200+ billion in economic damage. It remains the clearest case for residential power independence in the United States.
Is a home generator enough for Texas power outages?
A standby generator provides meaningful protection against typical outages — but the Uri event exposed generator limitations: extended cold weather affects propane vaporization (propane can struggle below -20°F), natural gas supply disruptions eliminated fuel for gas generators, and running generators continuously for 7–10 days requires very large fuel reserves. A hybrid battery-generator microgrid is more resilient: batteries handle short outages and power fluctuations; the generator runs only when needed, conserving fuel during extended events.
How do residential microgrids work with ERCOT and Texas utilities?
Texas operates on the ERCOT grid, which is largely isolated from the rest of the U.S. power grid. Residential interconnection rules are set by individual utilities (Oncor, CenterPoint, AEP Texas, etc.) and by the PUCT. Prime Microgrid handles all utility interconnection agreements and permitting for Texas installations, including net metering applications where applicable.
Are home microgrids worth it in Texas?
For high-value Texas properties — particularly in hurricane-risk coastal zones (Houston, Corpus Christi) and properties that experienced Uri-related damage or displacement — a residential microgrid is a meaningful investment in property protection and resilience. Texas experiences the full spectrum of grid threats: winter freeze events, summer heat waves causing demand-driven outages, and Gulf Coast hurricanes. A properly engineered system addresses all three.
Everything Stays On.
Customer-sited generation + energy storage + backup generation + intelligent controls = whole-property power continuity.
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