Solar in San Antonio, TX: 2026 Cost, Savings & Payback
Calculate 2026 solar panel cost, payback, and 25-year bill savings in San Antonio, Texas. Based on 5.7 peak sun hours/day, 13.5¢/kWh average electricity rate, CPS Energy utility context, and current IRS guidance for the ended federal residential clean energy credit.
Solar in San Antonio, TX: quick answer
A typical 6kW solar system in San Antonio costs about $16,440 before local or state incentives. For 2026 installs, the federal residential clean energy credit is modeled as $0, so the estimated cost remains about $16,440 before any local incentive. It produces about 9,986 kWh per year from 5.7 peak sun hours/day, saves about $1,348 per year, and reaches payback in about 12.2 years.
2026 6kW Cost
$16,440
Monthly Savings
$112
Production / kW
1,664 kWh
Panel Count
~15
5.7
Peak Sun Hours/Day
13.5¢
Avg Rate (¢/kWh)
12.2 yr
Payback Period
$46k
25-Year Savings
San Antonio Solar Overview
Calculate Your San Antonio Solar Savings
San Antonio average: $129/mo
South-facing roofs produce the most energy
Add $8,000-$12,000 for whole-home battery backup
Annual Production
kWh/year
Annual Savings
per year
Net System Cost
after 2026 federal credit
Payback Period
break-even time
Bill Offset and Export Assumptions
Current Annual Bill
$1,548
Estimated Usage
11,467 kWh
Bill Offset
87%
Used On Site
100%
Exported production is discounted in this planning model instead of being treated as a guaranteed one-for-one bill credit. For San Antonio, verify the current CPS Energy export-credit method and any fixed monthly charges before relying on the payback number.
25-Year Total Savings
$46,045
Monthly Savings
$112
2026 Federal Credit
$0
Cumulative Savings vs System Cost
Cost Breakdown
| Item | San Antonio | National Avg |
|---|---|---|
| Gross System Cost (6kW) | $16,440 | $17,100 |
| 2026 Federal Residential Credit | -$0 | $0 |
| Net System Cost | $16,440 | $17,100 |
| Cost Per Watt | $2.74/W | $2.85/W |
Solar Potential in San Antonio
Sun Hours vs National Average
San Antonio gets 27% more sun than the national average.
Climate Advantages
- 233 sunny days per year
- Average temperature: 59.5°F — cooler temps actually improve panel efficiency
- Average roof size: 2,076 sq ft — enough for a 115-panel system
San Antonio Solar Incentives & Programs
Federal Investment Tax Credit (ITC)
For 2026 planning, JouleIO does not subtract a federal residential clean energy credit. The IRS says the Residential Clean Energy Credit was 30% for eligible property installed from 2022 through December 31, 2025, and is not available for property placed in service after December 31, 2025.
Source: IRS Residential Clean Energy Credit and IRS One Big Beautiful Bill provisions.
Texas State Incentives
Texas property tax exemption for solar; utility buyback programs vary
Net Metering — CPS Energy
CPS Energy does not currently offer standard net metering in San Antonio. Alternative buyback programs may be available — contact them for details.
Environmental Impact in San Antonio
4.2
Tons CO2 Offset/Year
69
Equivalent Trees Planted
0.9
Homes Worth of Energy
Based on 9,986 kWh annual production with a 6kW system. EPA average: 0.417 metric tons CO2 per MWh, 10,632 kWh per US home.
Solar Energy in San Antonio, Texas
San Antonio, Texas receives an average of 5.7 peak sun hours per day, placing it among the best cities in the country for solar energy production. With electricity rates averaging 13.5¢ per kWh from CPS Energy, below the national average, but with rates rising 2-3% annually, the long-term savings are still meaningful.
A typical 6kW solar system in San Antonio produces approximately 9,986 kWh per year, saving homeowners an estimated $1,348 annually. The system pays for itself in about 12.2 years, after which you enjoy essentially free electricity for the remaining 13+ years of the system's warranty life.
San Antonio has a solar penetration rate of 4.9% — indicating early-stage solar adoption with tremendous growth potential as prices continue to fall. The cost of living index of 99 (national average: 100) is near the national average.
Other Cities in Texas
Abilene, TX
Allen, TX
Amarillo, TX
Arlington, TX
Austin, TX
Beaumont, TX
Brownsville, TX
Carrollton, TX
College Station, TX
Corpus Christi, TX
Dallas, TX
Denton, TX
Methodology & Solar Data Sources for San Antonio
How we calculate San Antonio solar potential and savings: Solar production estimates use NREL's PVWatts calculator methodology, applied to San Antonio's specific solar irradiance (peak sun hours), tilt angle, and azimuth. Cost figures combine NREL's Annual Technology Baseline for system pricing, ENERGY STAR's database for residential PV averages, and EIA Form 861 utility rate data for Texas.
- Solar irradiance for San Antonio: based on NREL National Solar Radiation Database (NSRDB) — 30-year average peak sun hours per day.
- System sizing assumes residential rooftop installation with standard 350-400W panels, calibrated to typical San Antonio household electricity usage.
- Federal tax credit: modeled as 0% for 2026 residential installations because IRS guidance says the Residential Clean Energy Credit is not available for property placed in service after December 31, 2025.
- Net metering assumes 1:1 retail-rate compensation typical in Texas (verify with local utility — some have shifted to net billing or avoided-cost rates).
- System lifetime standard 25 years with annual degradation of 0.5%/year per industry warranty norms.
Authoritative US solar data sources:
- NREL PVWatts Calculator — official US solar production estimator
- NREL National Solar Radiation Database — 30-year solar irradiance data
- IRS Residential Clean Energy Credit — 2026 federal residential credit status
- IRS One Big Beautiful Bill provisions — clean energy credit expiration overview
- DSIRE — State Solar Incentives — searchable database for Texas
- EIA Electric Power Monthly — Texas utility rate data
- ENERGY STAR Solar — efficient solar product database
Solar Disclaimer: Solar savings vary based on roof orientation, shading, system quality, installer markup, financing terms, utility rate plan, and policy changes. Always get 3+ quotes from NABCEP-certified installers and review contracts carefully. Tax credit eligibility depends on tax liability — consult a tax professional.
Reviewed by Brazora Monk · Last updated 2026 · NREL irradiance data per NSRDB latest release
Frequently Asked Questions
How much do solar panels cost in San Antonio, TX?
The average cost of a 6kW solar panel system in San Antonio is approximately $16,440 before local or state incentives ($2.74/watt). For 2026 planning, this calculator does not subtract a federal residential clean energy credit because IRS guidance says the credit is not available for property placed in service after December 31, 2025. Texas property tax exemption for solar; utility buyback programs vary
How many solar panels do I need in San Antonio, TX?
A typical 6kW residential solar system in San Antonio needs about 15 panels if each panel is rated near 400 watts. That system produces about 9,986 kWh per year in this estimate, or roughly 1,664 kWh per installed kW before shading, roof orientation, and inverter losses are customized.
How many peak sun hours does San Antonio get?
San Antonio, TX receives an average of 5.7 peak sun hours per day and approximately 233 sunny days per year. This is above the national average of 4.5 hours, making it an excellent location for solar energy.
What is the solar payback period in San Antonio?
The average solar payback period in San Antonio is approximately 12.2 years for a 6kW cash-price estimate before local or state incentives. After payback, your solar panels generate essentially free electricity for the remaining warranty life. Over 25 years, bill savings can reach about $46,045 before subtracting installation cost.
Does San Antonio have net metering?
San Antonio does not currently have standard net metering. However, CPS Energy may offer alternative solar buyback programs. Contact them for current rates and policies.
Is solar worth it in San Antonio, TX in 2026?
It can be. The 12.2-year estimated payback is moderate, so the decision depends on quote quality, financing terms, roof condition, and local incentives. For 2026 installs, JouleIO does not assume a federal residential credit; local incentives and net metering are the main financial drivers.