San Antonio, TX
Home battery backup for San Antonio homeowners
San Antonio sits in CPS Energy territory, the largest municipally owned electric utility in the country. ERCOT grid emergencies still hit here, and Uri in 2021 produced multi-day outages across Bexar County. Eos installs automatic battery systems that take over the moment the grid drops, no fuel and no manual switchover.
Why San Antonio is buying batteries
San Antonio came through the 2021 winter storm with significant outages and a public reckoning over CPS Energy planning and ERCOT coordination. The 2023 ice storm produced more localized outages tied to tree damage in older neighborhoods. Both events drove sustained battery interest across Bexar County.
San Antonio homes range widely in age, from historic 1920s bungalows in King William and Government Hill to modern Stone Oak and Cibolo Canyons builds. Older homes sometimes need a panel upgrade or sub-panel as part of the battery scope; newer builds typically have clean 200A service and straightforward placement.
For homes with solar already in place, we add storage that captures solar production for use overnight or during outages. CPS Energy has well-defined rules for residential solar+battery interconnection, which we handle on your behalf.
How the system works
Automatic protection
When the grid goes down, the battery switches on in under 20 milliseconds. No manual action required.
Sized for your home
We assess actual usage and configure coverage from essentials only to full-home including AC and heat pump.
Permits and utility
We file with City of San Antonio Development Services and submit the CPS Energy interconnection notification on your behalf.
San Antonio neighborhoods we cover
We install across San Antonio and the surrounding Bexar County communities.
San Antonio zip codes we install in
San Antonio spans dozens of zip codes across Bexar County. Below are some of the most common.
78209
Alamo Heights and Terrell Hills. Older homes with mature panel infrastructure; occasional upgrades needed.
78212
Olmos Park, Monte Vista, and the historic city core. Mix of 1920s through 1960s construction.
78230
Northwest San Antonio. Mid-century and newer subdivisions with mostly 200A service.
78248
Stone Oak corridor north of Loop 1604. Modern master-planned communities with clean panel infrastructure.
78258
Hollywood Park, Hill Country Village, and surrounding far-north neighborhoods.
78216
North-central San Antonio including parts of Castle Hills and Castle Oaks.
Common questions from San Antonio homeowners
Which utility serves San Antonio?
CPS Energy is the transmission and distribution utility for San Antonio, including the city itself and most of Bexar County. CPS Energy is the largest municipally owned electric utility in the United States. Battery installations require a CPS interconnection notification, which our team handles.
Did the 2021 winter storm affect San Antonio?
Yes. CPS Energy customers experienced multi-day outages during Winter Storm Uri in February 2021, with rolling blackouts that turned into extended cold snaps for some neighborhoods. The 2023 ice storm also produced localized multi-day outages in the older parts of the city. Battery interest in San Antonio has stayed strong since.
How long is the lead time for a San Antonio installation?
Outside the Greater Houston metro, scheduling is slightly longer than our typical 1 to 2 week window. San Antonio installations typically run 4 to 6 weeks total from first contact to a working system, including permit processing through City of San Antonio Development Services and CPS coordination.
Does CPS Energy support residential battery interconnection?
Yes. CPS Energy has a defined interconnection process for residential battery storage, including backup-only configurations and solar+battery installs. We submit the interconnection notification on your behalf and coordinate any utility-side work required.
Pricing for San Antonio homeowners
Installed systems range from $9,915 to $23,030 depending on capacity. In-house financing from $87.45/month with no credit score impact to check eligibility.
Contact us
Coverage area: San Antonio and the surrounding Bexar County communities.
Scheduling typically available within four to six weeks for San Antonio area installations.
Ready to protect your San Antonio home?
Talk to a specialist or explore plans online.