Solar Panels Houston 2026: Real Costs, ERCOT Buyback Plans & Payback Data
Last updated: April 2026 · Data sources: PVGIS, EIA, DSIRE, ERCOT
Houston is one of the sunniest major cities in the US and the heart of Texas's booming solar market — the state added more solar capacity in 2024 than any other state, accounting for roughly 40% of all US solar additions according to EIA data. But Houston solar comes with a twist: because Texas uses the deregulated ERCOT grid, there is no mandatory statewide net metering. Your savings depend heavily on which retail electricity provider (REP) you choose and whether they offer a competitive solar buyback plan.
How Does Net Metering Work in Houston's Deregulated ERCOT Market?
Unlike California, New York, or other states with utility-administered net metering, Texas deregulated its electricity market in 2002. Houston homeowners choose their REP from dozens of competing providers. This means solar buyback rates vary dramatically — from $0 (no credit) to near-retail rates depending on the plan.
When you generate more solar than you use, your system exports to the grid. Your REP either credits that energy at a buyback rate or provides bill credits — but the rate is set by the REP, not a regulator. Shopping for the right REP is as important as shopping for the right installer.
Popular Houston Solar Buyback Plans (2026)
| REP / Plan | Buyback Rate | Notes |
|---|---|---|
| Rhythm Energy – Solar Buyback | ~10–12 ¢/kWh | Popular choice; credits at wholesale-adjacent rates |
| Reliant – Solar Edge | Variable | Tracks ERCOT real-time prices; good in peak summer |
| Green Mountain Energy – Pollution Free e-Plus | ~8–10 ¢/kWh | 100% renewable match; credit rolls month-to-month |
| TXU Energy – Solar Advantage | ~6–8 ¢/kWh | Flat buyback rate; simpler billing |
| No solar plan REP | $0 | Export goes uncompensated — avoid if you have solar |
Buyback rates change frequently. Always verify with the REP before signing. Source: Power to Choose (PUCT)
What Does Solar Cost in Houston in 2026?
The national average solar installation cost is approximately $2.80 per watt before incentives (source: LBL Tracking the Sun). Houston pricing is typically slightly below the national average due to Texas's competitive installer market and high installation volume.
| System Size | Gross Cost | Annual Output | Annual Savings | Payback |
|---|---|---|---|---|
| 5 kW | $14,000 | 6,970 kWh | $1,094 | 12.8 yr |
| 8 kW | $22,400 | 11,152 kWh | $1,750 | 12.8 yr |
| 10 kW | $28,000 | 13,940 kWh | $2,187 | 12.8 yr |
| 12 kW | $33,600 | 16,728 kWh | $2,624 | 12.8 yr |
Calculations: PVGIS yield 1,394 kWh/kWp · EIA rate 15.69¢/kWh · $2.80/W national avg · No federal ITC (expired Dec 31, 2025). Payback assumes 80% self-consumption / 20% export at 10¢/kWh buyback.
Houston & Texas Solar Incentives in 2026
| Incentive | Status | Details |
|---|---|---|
| Federal ITC (Section 25D) | ❌ Expired | Expired December 31, 2025. No longer available for residential. |
| Texas Property Tax Exemption | ✅ Active | 100% of added home value from solar exempt from property tax (TX Tax Code §11.27) |
| Texas Sales Tax Exemption | ✅ Active | Solar equipment exempt from 8.25% Texas/local sales tax |
| State Income Tax Credit | N/A | Texas has no state income tax |
| CenterPoint / Oncor Rebates | Check locally | Some Houston-area utilities have offered rebates; verify with your utility |
Source: DSIRE — Database of State Incentives for Renewables & Efficiency
Monthly Solar Output in Houston (10 kW System)
| Month | Output (kWh) | Notes |
|---|---|---|
| January | 945 kWh | Short days, mild temps |
| February | 1,050 kWh | Increasing daylight |
| March | 1,260 kWh | Spring peak approaching |
| April | 1,330 kWh | Excellent irradiance |
| May | 1,360 kWh | Pre-summer peak |
| June | 1,310 kWh | Peak sun + heat, slight efficiency loss |
| July | 1,290 kWh | Hottest month — heat reduces panel efficiency |
| August | 1,270 kWh | Similar to July |
| September | 1,190 kWh | Cooling, good output |
| October | 1,120 kWh | Declining daylight |
| November | 970 kWh | Shorter days |
| December | 845 kWh | Lowest output month |
Source: PVGIS (European Commission) — satellite-based irradiance data for Houston (29.76°N, -95.37°W)
Houston Solar News & Market Updates (2026)
- Texas leads US solar additions (2024–2026): Texas accounted for approximately 40% of all US utility-scale and distributed solar additions in 2024, driven by ERCOT's wholesale market dynamics and abundant land. Houston metro is a key driver of residential growth. EIA Electric Power Monthly →
- ERCOT real-time prices reward solar exports in summer peaks: During summer afternoons, ERCOT spot prices can spike above $100/MWh. REPs with real-time pricing plans (like Reliant Solar Edge) can pass these premium rates to solar exporters, significantly boosting returns. ERCOT Generation Data →
- Texas property tax exemption confirmed through 2026: The legislature reaffirmed the 100% solar property tax exemption, meaning a home that gains $30,000 in value from solar pays $0 additional property tax — a significant benefit in high-tax Houston neighborhoods. DSIRE Texas →
Frequently Asked Questions: Solar in Houston
Does Houston have net metering?
Texas has no statewide net metering mandate. Houston is in the deregulated ERCOT grid, so buyback rates depend on your retail electricity provider (REP). Plans like Rhythm Energy Solar Buyback and Reliant Solar Edge offer compensation for exports — but rates vary. Always compare plans before going solar.
What is the payback period for solar in Houston?
Based on PVGIS data (1,394 kWh/kWp/yr), EIA's 15.69¢/kWh average rate, and $2.80/W installation cost, a 10 kW system has an estimated payback of about 8.6 years without any federal credit (ITC expired Dec 31, 2025). With Texas's property tax exemption, effective payback is somewhat shorter.
Is there a Texas state solar tax credit?
No. Texas has no state income tax, so there's no income tax credit. However, Texas offers two valuable financial incentives: a 100% property tax exemption on added solar home value, and no sales tax on solar equipment — together worth thousands of dollars.
How much solar energy does Houston receive?
PVGIS satellite data shows Houston averages 1,394 kWh per kWp per year. A 10 kW system produces approximately 13,940 kWh annually — enough to cover the average Texas home's usage of around 14,112 kWh/year (EIA 2023).
What happened to the 30% federal solar tax credit?
The Section 25D residential ITC expired on December 31, 2025. There is currently no federal tax credit for residential solar installations in 2026. Commercial installations may qualify under Section 48E. Consult a tax advisor for your situation.
Authoritative Sources
- PVGIS (European Commission) — Solar irradiance data for Houston
- EIA Electric Power Monthly — Texas residential electricity rates
- DSIRE — Texas solar incentives database
- LBL Tracking the Sun — Installed solar system cost data
- ERCOT — Texas grid generation and pricing data
- Power to Choose (PUCT) — Compare Texas REP solar buyback plans
See Houston's Solar Data
View real PVGIS yield figures, local electricity rates, and system estimates for Houston.
Houston Solar Calculator →