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Generator Installation · Texas
A generator must connect through a transfer switch or an approved interlock so it can never feed power back into utility lines. Electricians install standby generators, portable generator inlets with interlocks, and the transfer equipment for both.
Heat, hail and the 2021 winter storm have made generators, surge protection and panel capacity priorities; electricians are licensed by the state through TDLR.
Across the South Central, homes deal with long, hot summers, severe storms and occasional hard freezes. Permit offices, utilities and housing stock differ by city, which affects how generator installation is planned and scheduled. These local guides cover the Texas cities where we have written specific notes.
After repeated hurricanes and the February 2021 winter storm, standby generators and generator inlets with interlocks are among the most requested electrical projects in the Houston area. A whole-home standby unit needs a transfer switch, a correctly sized natural-gas line and placement that meets clearance rules; in flood-prone areas, mounting height matters too.
Utility: CenterPoint Energy (lines and meters); retail provider of your choice
The February 2021 winter storm left millions of Texans without power for days in freezing temperatures, including much of Dallas, and it changed how many homeowners think about backup power. Spring storms and summer heat waves add more risk.
Utility: Oncor (lines and meters); retail provider of your choice
The February 2021 winter storm left many San Antonio homes without power for days in freezing weather, and generator requests rose sharply afterward. The most affordable setup is an inlet box and a breaker interlock, which lets a portable generator feed chosen circuits such as the furnace blower, refrigerator and some lights.
Utility: CPS Energy (city-owned)
After the 2021 winter storm and the February 2023 ice storm, which left many Austin neighborhoods without power for days as falling limbs took down lines, backup power became a common request. Options range from a generator inlet with an interlock for a portable unit to a standby generator with an automatic transfer switch.
Utility: Austin Energy (city-owned)
The February 2021 winter storm left much of Tarrant County without power in freezing weather, and generator installs in Fort Worth rose afterward. A portable generator with an inlet box and a breaker interlock can power heat, the refrigerator and lights without backfeeding Oncor's lines.
Utility: Oncor (lines and meters); retail provider of your choice
Hurricane season is a fact of life in Corpus Christi, and storms such as Harvey in 2017 and Hanna in 2020 caused outages across the Coastal Bend. Standby generators with automatic transfer switches should sit above expected flood levels and be built for salt air, especially on North Padre Island and near the bay.
Utility: AEP Texas (lines and meters); retail provider of your choice
The February 2021 winter storm left many Waco homes without power for days in freezing cold, and spring storms and summer heat add more outage risk. Many households now want backup for the furnace blower, refrigerator and a few lights, which a portable generator can run through an outdoor inlet and panel interlock.
Utility: Oncor (lines and meters); retail provider of your choice
The February 2021 winter storm left many Plano homes without power for days in freezing cold, and natural-gas standby generators with automatic transfer switches became a popular upgrade afterward. Atmos Energy may need to upgrade the gas meter for a whole-house unit.
Utility: Oncor (lines and meters); retail provider of your choice
Ice storms in East Texas coat Tyler's tall pines and bring them down across lines, and the February 2021 winter storm left many homes without power for days in freezing cold. Spring tornadoes add to the risk.
Utility: Oncor (lines and meters); retail provider of your choice
1. Size the load
Circuits that must stay powered are listed and the generator sized.
2. Choose the connection
Inlet and interlock, manual transfer switch or automatic transfer switch.
3. Install and inspect
Permitted installation, gas connection by a licensed fitter where needed, and inspection.
Electricians set their own prices; local permit fees and utility requirements add to these factors.
Permits come from the city or county where the home is. For example: Houston: Inside city limits, electrical permits come from the City of Houston's permitting center; unincorporated Harris County and suburban cities have their own rules. Dallas: Electrical permits in Dallas come from the city's Development Services department; suburbs such as Plano, Garland and Irving issue their own. San Antonio: Inside city limits, electrical permits come from the City of San Antonio Development Services Department; suburban cities issue their own. Austin: Electrical permits inside the city come from the City of Austin Development Services Department; surrounding cities and Travis County have their own processes. Fort Worth: Inside city limits, electrical permits come from the City of Fort Worth Development Services Department, and Fairmount and other historic districts review exterior changes. Corpus Christi: Electrical permits inside city limits come from the City of Corpus Christi's development services. Waco: Electrical permits inside city limits come from the City of Waco's inspection services. Plano: Electrical permits come from the City of Plano's building inspections department. Tyler: Electrical permits inside city limits come from the City of Tyler's building services; Smith County handles unincorporated areas.
Houston: CenterPoint Energy (lines and meters); retail provider of your choice. Dallas: Oncor (lines and meters); retail provider of your choice. San Antonio: CPS Energy (city-owned). Austin: Austin Energy (city-owned). Fort Worth: Oncor (lines and meters); retail provider of your choice. Corpus Christi: AEP Texas (lines and meters); retail provider of your choice. Waco: Oncor (lines and meters); retail provider of your choice. Plano: Oncor (lines and meters); retail provider of your choice. Tyler: Oncor (lines and meters); retail provider of your choice.
Listed interlock kits are accepted in many jurisdictions when installed with a permit. Your electrician will know the local rule.
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