Local Guide · Standby generator installation · San Antonio, TX
What should San Antonio homeowners know about standby generators?
CPS Energy warns against wiring generators into a home without a qualified electrician. Here is what Texas law requires and what the 2021 freeze taught.
In San Antonio, CPS Energy says a generator should not be connected directly to household wiring except by a qualified electrician, and should be placed at least 25 feet from a home. The electrical work must be done by a TDLR-licensed electrician, propane work needs a Railroad Commission license, and since 2025 third parties may review and inspect home backup power systems.
Key facts for San Antonio, TX
- CPS Energy says generators should not be connected directly to household wiring except by a qualified electrician.
- CPS Energy advises placing generators at least 25 feet from a home or building.
- CPS Energy says never to use a generator in an enclosed space and to make sure it is properly grounded.
- During the February 2021 winter storm, San Antonio International Airport was below freezing for 4 days and 12 hours, one hour short of the 1951 record.
- San Antonio recorded 2 to 3 inches of snow in the February 2021 storm, according to NWS.
- Texas SB 1202, effective September 1, 2025, lets qualified third parties review and inspect home backup power installations up to 600 volts.
What does CPS Energy advise?
CPS Energy says generators should not be connected directly to household wiring except by a qualified electrician. It advises placing them at least 25 feet from a home or building, never using one in an enclosed space, grounding it properly, and turning off appliances before shutting the generator down.
What did the 2021 freeze show?
The National Weather Service reported that San Antonio International Airport stayed below freezing for 4 days and 12 hours in February 2021, one hour short of the record set in 1951. San Antonio got 2 to 3 inches of snow. Long cold outages are why many local homeowners consider standby power.
Who must do the work?
The transfer switch and wiring are electrical work for a TDLR-licensed electrician. Propane piping needs a Railroad Commission LP-gas license. Under SB 1202, a qualified third party may review and inspect the backup power installation, and the city must issue the permit within three business days of an approved review.
How to choose a provider in San Antonio, TX
- Check the electrical contractor on TDLR's license search.
- For propane, ask for the installer's Railroad Commission license.
- Ask who pulls the electrical and gas permits, or whether third-party review applies.
- Confirm the transfer switch is part of the permitted job.
- Check HOA screening rules.
- Install CO alarms on every level.
Nearby
Questions people ask
Can I plug a generator into my San Antonio home's wiring?
CPS Energy says not without a qualified electrician. Direct connections can backfeed the grid.
How far should a generator be from my home?
CPS Energy advises at least 25 feet from a home or building.
Who licenses propane generator installers in San Antonio?
The Railroad Commission of Texas licenses LP-gas installers statewide.
How long did San Antonio stay below freezing in 2021?
NWS reported 4 days and 12 hours at San Antonio International Airport.
Can a third party inspect my generator?
Yes. Texas SB 1202 lets qualified third parties review and inspect home backup power systems up to 600 volts.
Sources
This guide was written by our editorial team from the public sources listed above. It is general information, not legal advice; confirm licensing and terms directly with any provider.
