Solar panels in San Antonio, Texas: output, savings and payback
Solar panels in San Antonio produce about 1,512 kWh a year for each kW installed, about the same as the average of the 400 US cities in our data (1,517 kWh). Among the 47 Texas cities we cover, it ranks 34th of 47 for solar output, against an average there of 1,554 kWh.
Texas’s average residential electricity price for January to August 2026 was 16.03¢ per kWh, 2.16¢ below the US average of 18.19¢, according to the Energy Information Administration.
For a home using the US average of 899 kWh a month, a 7.1 kW system would cover a year’s use and save about $1,729 in its first year, or $58,955 over 25 years. San Antonio gets close to the average sunshine of the 400 US cities in our data, so the same home would need about the same size of system anywhere in that group.
There is no verified US installed-price figure yet, so add the price per watt from your installer’s quote in the calculator below to see the payback period for San Antonio.
A typical home in San Antonio
- System size
- 7.1 kW
- Sized to cover 10,788 kWh a year
- First-year generation
- 10,788 kWh
- First-year savings
- $1,729
- At 16.03¢ per kWh
- Savings over 25 years
- $58,955
- Prices rising 3% a year
- Payback
- Needs your quote
- No verified US installed price yet: enter yours below
Assumes all the electricity the panels make is used at home, up to the home’s yearly use, and that panel output falls 0.5% a year. Power sent to the grid is counted at zero.
How San Antonio compares
| San Antonio | Texas average | US average | |
|---|---|---|---|
| Solar output, kWh per kW a year | 1,512 | 1,554 | 1,517 |
| Electricity price per kWh | 16.03¢ | 16.03¢ | 18.19¢ |
| System size for a typical home | 7.1 kW | 6.9 kW | 7.1 kW |
| First-year savings | $1,729 | $1,729 | $1,962 |
Averages are of the 47 places in Texas and the 400 US cities in our data, unweighted. The US column uses the US average price as well as the average sunshine.
Your home in San Antonio
All amounts in US dollars.
Results
Payback period
Add your installer’s quoted price to see payback
- First-year savings
- $1,729
- Savings over 25 years
- $58,955
- System size
- 7.1 kW
- Sized to cover your yearly use
- First-year generation
- 10,788 kWh
Year-by-year table
| Year | Generation (kWh) | Price per kWh | Saved that year | Saved so far |
|---|---|---|---|---|
| 1 | 10,788 | $0.160 | $1,729 | $1,729 |
| 2 | 10,734 | $0.165 | $1,772 | $3,502 |
| 3 | 10,680 | $0.170 | $1,816 | $5,318 |
| 4 | 10,627 | $0.175 | $1,861 | $7,179 |
| 5 | 10,574 | $0.180 | $1,908 | $9,087 |
| 6 | 10,521 | $0.186 | $1,955 | $11,042 |
| 7 | 10,468 | $0.191 | $2,004 | $13,046 |
| 8 | 10,416 | $0.197 | $2,054 | $15,099 |
| 9 | 10,364 | $0.203 | $2,105 | $17,204 |
| 10 | 10,312 | $0.209 | $2,157 | $19,361 |
| 11 | 10,261 | $0.215 | $2,210 | $21,571 |
| 12 | 10,209 | $0.222 | $2,265 | $23,837 |
| 13 | 10,158 | $0.229 | $2,322 | $26,158 |
| 14 | 10,107 | $0.235 | $2,379 | $28,538 |
| 15 | 10,057 | $0.242 | $2,438 | $30,976 |
| 16 | 10,007 | $0.250 | $2,499 | $33,475 |
| 17 | 9,957 | $0.257 | $2,561 | $36,036 |
| 18 | 9,907 | $0.265 | $2,625 | $38,661 |
| 19 | 9,857 | $0.273 | $2,690 | $41,351 |
| 20 | 9,808 | $0.281 | $2,757 | $44,108 |
| 21 | 9,759 | $0.290 | $2,825 | $46,934 |
| 22 | 9,710 | $0.298 | $2,896 | $49,829 |
| 23 | 9,662 | $0.307 | $2,968 | $52,797 |
| 24 | 9,613 | $0.316 | $3,041 | $55,838 |
| 25 | 9,565 | $0.326 | $3,117 | $58,955 |
Savings count only electricity your home no longer buys. Power sent to the grid is valued at zero. Grid emissions data has not been verified yet, so no carbon figure is shown. See the methodology for every formula and source.
Nearby cities
| City | Distance | kWh per kW a year | Price per kWh | System size | First-year savings |
|---|---|---|---|---|---|
| Houston, Texas | 190 miles | 1,428 | 16.03¢ | 7.6 kW | $1,729 |
| Phoenix, Arizona | 847 miles | 1,788 | 15.36¢ | 6.0 kW | $1,657 |
| Chicago, Illinois | 1,048 miles | 1,369 | 19.23¢ | 7.9 kW | $2,075 |
| San Diego, California | 1,122 miles | 1,742 | 32.58¢ | 6.2 kW | $3,515 |
| Los Angeles, California | 1,208 miles | 1,707 | 32.58¢ | 6.3 kW | $3,515 |
Solar panels in San Antonio: questions
- How much electricity do solar panels produce in San Antonio, Texas?
- About 1,512 kWh a year for each kW of panels, for a roof-mounted, south-facing array at a 30° tilt with 14% system losses (PVWatts). A 7.1 kW system would make about 10,788 kWh in its first year. Shade, a different roof angle or an east or west-facing roof will change this.
- How much could solar panels save in San Antonio, Texas?
- At Texas’s average residential price of 16.03¢ per kWh, a 7.1 kW system sized for an average US home would save about $1,729 in its first year and $58,955 over 25 years. That assumes the home uses all the power the panels make, electricity prices rise 3% a year and panel output falls 0.5% a year. Power sent to the grid is counted at zero. At the US average price of 18.19¢, the first-year figure would be $1,962.
- How long do solar panels take to pay back in San Antonio, Texas?
- It depends on the installed price on your quote, which varies by installer and system, and we do not have a verified US average to use. Enter your quote in the calculator on this page: San Antonio’s solar output and Texas’s electricity price are already filled in. Every $0.10 per watt adds about $710 to the price of a 7.1 kW system.
- What do homes in San Antonio, Texas pay for electricity?
- Texas’s average residential price for January to August 2026 was 16.03¢ per kWh, against 18.19¢ for the US as a whole (EIA Electric Power Monthly, Table 5.6.B). Your own rate depends on your utility and plan, so use the figure from your bill in the calculator if you can.
- How does San Antonio compare with nearby cities?
- Of the 5 nearest cities we cover, Phoenix (847 miles away) gets the most sun at 1,788 kWh per kW, and Chicago (1,048 miles away) the least at 1,369 kWh. San Antonio gets 1,512 kWh. Within Texas, it ranks 34th of the 47 cities we cover.
- Where do these figures come from?
- Solar output is from the PVWatts V8 tool for San Antonio’s coordinates in the Census Bureau Gazetteer, checked on 2026-11-10. The electricity price is the EIA residential average for Texas for January to August 2026, and household use is the EIA average for US homes. Each figure is listed with its source link at the bottom of this page.
Sources for this page
- Solar output for San Antonio: developer.nlr.gov (checked 2026-11-10)PVWatts V8.5.0 outputs.ac_annual for a 1 kW system. Weather data: 655922.csv, station at 29.45000076293945, -98.54000091552734 (2,058 m away).
- Texas electricity price: www.eia.gov (checked 2026-11-11)Texas, residential sector, year-to-date through August 2026. Published as 16.03 cents per kilowatthour.
- US average price: www.eia.gov (checked 2026-11-11)U.S. Total, residential sector, year-to-date through August 2026. Published as 18.19 cents per kilowatthour.
- Typical household use: www.eia.gov (checked 2026-11-10)Average annual electricity sold to a U.S. residential utility customer in 2022: 10,791 kWh ("an average of about 899 kWh per month").
- Panel output loss: docs.nlr.gov (checked 2026-11-10)Median of nearly 2,000 reported degradation rates: "a median value of 0.5%/year" (average 0.8%/year).
- Location: www2.census.gov (checked 2026-11-10)Census Gazetteer INTPTLAT/INTPTLONG (internal point) for GEOID 4865000, "San Antonio city".
Methods and every other figure are on the methodology page.