Solar Panel Cost in San Antonio, TX (2026)
Real installed prices, CPS Energy credit rules, local rebates and how long a system takes to pay for itself in San Antonio.
Estimate your San Antonio system
Assumes a local rate of 13¢/kWh, 1730 kWh generated per installed kW per year, $2.75/W installed, the 30% federal credit and local rebates. Estimates only.
Get 3 free San Antonio quotes
Solar prices in San Antonio by system size
| System | Gross cost | After 30% credit | After local rebates | Yearly output | Yearly savings | Payback |
|---|---|---|---|---|---|---|
| 4 kW | $11,000 | $7,700 | $7,700 | 6,920 kWh | $900 | 8.6 yrs |
| 6 kW | $16,500 | $11,550 | $11,550 | 10,380 kWh | $1,349 | 8.6 yrs |
| 8.5 kW | $23,375 | $16,362 | $16,362 | 14,705 kWh | $1,912 | 8.6 yrs |
| 10 kW | $27,500 | $19,250 | $19,250 | 17,300 kWh | $2,249 | 8.6 yrs |
Payback lengthens with size here: exported power is credited at an avoided-cost rate well below retail, so oversizing has a smaller payoff than under true net metering.
What makes San Antonio different
1. CPS Energy is a municipal utility
San Antonio is served by CPS Energy, a publicly owned utility rather than an investor-owned one. You cannot shop retail electricity providers the way most of the state can. Your rate, credit program and interconnection process all come from CPS Energy.
2. Export credit is set by the utility, not the market
CPS Energy credits exported power at a rate it sets itself. In practice you are paid less for what you export than you pay for what you import, so sizing to your own usage matters more here than under true net metering.
3. Exported power is credited at avoided cost
San Antonio sits in an avoided-cost regime: exports are valued below retail, often well below. Batteries that let you self-consume instead of export carry more value here than in a true net-metering market.
4. Heat cuts real output
Panels lose roughly 10–15% of nameplate output above 25°C, and San Antonio summers are hard on them. The 1730 kWh per kW figure on this page already reflects local conditions — a national-average calculator will overstate your output.
5. Low local rates mean size discipline matters
At about 13¢/kWh, San Antonio has cheap power by national standards. Cheap rates stretch payback, so an oversized system hurts more here than in a high-rate market. Match the array to your own annual usage.
What affects your price in San Antonio
- System size — the single biggest driver.
- Roof pitch and height — steep or two-storey roofs add labour.
- Roof age — replace worn shingles first; re-roofing around panels costs more later.
- Panel and inverter tier — premium modules and microinverters add 15–25%.
- Main panel upgrade — older homes may need a 200A service upgrade, $1,500–$3,000.
- Battery — optional, roughly $10,000–$15,000 installed.
- Season — late autumn and winter installs are often cheaper.
Solar cost in nearby cities
| City | Utility | Export credit |
|---|---|---|
| Austin, TX | Austin Energy | value of solar |
| Houston, TX | CenterPoint | none |
| Dallas, TX | Oncor | none |
| El Paso, TX | El Paso Electric | avoided cost |
San Antonio solar FAQ
How much do solar panels cost in San Antonio?
A 6 kW system — the most common size locally — costs about $16,500 installed before incentives, or $11,550 after the 30% federal tax credit and local rebates.
How long is the payback period in San Antonio?
Roughly 8.6 years for a properly sized system, based on local rates, 1730 kWh of production per installed kW, and current incentives.
Does CPS Energy offer a rebate?
Programs and funding change. Confirm the current CPS Energy incentive directly with the utility, and never accept an installer's rebate promise that isn't in writing.
Do I need a permit to install solar in San Antonio?
Yes. San Antonio requires an electrical and structural permit plus an inspection, and CPS Energy handles interconnection separately. A reputable installer files all of it — ask to see the permit number.
How much roof space does a system need?
A 6 kW array needs roughly 390–510 square feet of unshaded roof, depending on panel wattage and layout.
Is San Antonio a good place for solar?
The sun resource is strong at about 1730 kWh per installed kW per year, and local rates run near 13¢/kWh. The real variables are roof condition, shading and CPS Energy's export credit rules.
Ready for exact numbers?
Get three quotes from vetted San Antonio installers. Form-only — they call you.
Sources & method
Production modelled with NREL PVWatts. Utility rate from EIA retail-sales data. Incentive data from DSIRE and IRS guidance. Installed cost benchmarked to local market pricing. Last updated October 2026. Estimates only — not a quote.