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 an estimated 5.7 peak sun hours/day, a 13.5¢/kWh planning electricity rate, CPS Energy as the likely utility, 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¢
Planning 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
no 2026 federal credit applied
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
- About 233 sunny days per year (planning estimate)
- Estimated average temperature: 59.5°F, cooler temps actually improve panel efficiency
- Assumed roof size: 2,076 sq ft, enough for a 115-panel system
San Antonio Solar Incentives & Programs
Federal Residential Clean Energy Credit (Section 25D)
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
JouleIO's planning data does not show standard net metering for CPS Energy customers in San Antonio. An export-credit or buyback option may still exist, so confirm current terms with the utility that serves your address.
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 a planning electricity rate of 13.5¢ per kWh (EIA Texas residential average for 2026-06: 15.94¢; U.S. average 18.34¢), below the national average, so payback is slower even with this calculator's 2.5% annual rate-increase assumption.
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.
JouleIO's dataset carries a modeled solar-adoption value of 4.9% for San Antonio. It is a rough planning placeholder, not a measured count of local installations, so use utility interconnection data or installer quotes if local adoption matters to your decision.
Other Cities in Texas
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Methodology & Solar Data Sources for San Antonio
How we calculate San Antonio solar potential and savings: Annual production = system kW × estimated peak sun hours × 365 × 0.80 system derate × a roof-orientation factor. This is a simplified planning formula, not a PVWatts run for your address. Cost uses a planning price per watt for Texas, and bill savings use a planning electricity rate of 13.5¢/kWh (the EIA Texas residential average for 2026-06 is 15.94¢/kWh).
- Peak sun hours for San Antonio (5.7/day) are a planning estimate in the typical range for Texas, not a site-specific NREL NSRDB value. Enter your address in NREL PVWatts for a location-specific production estimate.
- System sizing defaults to a 6kW residential rooftop system with roughly 400W panels; adjust the size and monthly bill to match your home.
- 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.
- Exports are discounted rather than credited 1:1 at retail, because many utilities have shifted to net billing or avoided-cost export rates. Verify your utility's current tariff.
- 25-year savings assume a 2.5% annual electricity-rate increase and do not subtract panel degradation, inverter replacement, or maintenance.
Authoritative US solar data sources:
- NREL PVWatts Calculator, official US solar production estimator
- NREL National Solar Radiation Database, site-level solar irradiance data for checking your address
- 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 Table 5.6.A, Texas residential average price
- 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 Marcus Delacroix · Last updated 2026 · Sun-hour and rate inputs are planning estimates; EIA state rate period 2026-06
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?
JouleIO models San Antonio, TX at about 5.7 peak sun hours per day and roughly 233 sunny days per year. These are planning estimates, not site measurements, so check your exact address in NREL PVWatts. 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?
JouleIO's planning data does not show standard net metering for San Antonio. The utility serving your address (likely CPS Energy) may still offer an export-credit or buyback option, so confirm current rates and policies directly.
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.