Solar Atlas · Texas
Is solar worth it in San Antonio, TX?
A 7 kWdc rooftop array in San Antonio makes about 10,478 kWh a year (NLR PVWatts, modeled) and pays back in 21.3 years at City of San Antonio’s 12.7¢/kWh residential rate (Aug 2025–Jul 2026), with no federal credit. Exports follow CPS Energy net metering (monthly net excess generation credit).
29.42°N · 10.1–13.9 h daylight · site signature
- Production
- 1,497 kWh per kWdc per year · capacity factor 17.1% AC
- Residential rate
- 12.7¢/kWh · City of San Antonio
- Exported solar
- CPS Energy net metering (monthly net excess generation credit) · 1.77¢/kWh
- Climate
- humid subtropical (Köppen Cfa) · 20.9 °C mean, 822 mm/yr
Source: NLR PVWatts v8.5.0 (NSRDB PSM V3 GOES tmy-2020 3.2.0) — 1 kW, tilt 20°, azimuth 180°, roof mount, 14% losses · fetched 2026-09-24 · modeled, not metered
Source: EIA-861M utility average · Aug 2025–Jul 2026 · EIA Texas average Jan–Jul 2026 16.1¢ · utility’s EIA-861 2024 average 12.4¢
Source: CPS Energy (San Antonio) residential customers with net-metered solar ≤ 25 kW AC (Rider #5); larger systems need a CPS Energy power purchase agreement · checked 2026-09-25
Source: NOAA NCEI Climate Normals 1991–2020, SAN ANTONIO INTL AP, TX US (13.8 km away) · fetched 2026-09-24
No federal credit: the homeowner credit (§25D) ended for systems installed after 2025-12-31. A lease or PPA price may reflect the lessor’s §48E credit. 26 U.S.C. §25D(h) and (e)(8)(A) · policy as of 2026-09-24
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Your exact roof, or a business
The payback calculator runs hourly PVWatts at your address. The Modeler opens a grid-tied home at San Antonio. A business goes to the Quote Studio with the 10.4¢/kWh commercial rate.