Solar in Rockwall, TX
With Grayson-Collin Electric Cooperative's electricity at about 17.7¢ per kWh and 1,524 kWh of sun per kW, solar is worth it for a typical Rockwall home today: about a 12.6-year payback.
- Payback, typical home
- 12.6 yrsTexas: 14 yrs
- 25-year net
- $16,742after paying $12,740
- Sun
- 1,524kWh per kW per year
- Electricity
- 17.7¢2% below U.S. average
A typical Rockwall home, by the numbers
| Utility | Grayson-Collin Electric Cooperative |
|---|---|
| Electricity use | 1,128 kWh a month |
| Best-value system | 4.4 kW, about 10 panels, 6,705 kWh a year (50% of use) |
| Cost | $12,740 |
| First-year savings | $989 |
| Payback | 12.6 years |
| Exported power | No statewide net metering (Texas rule) |
Cash purchase, no federal credit, 2.9% yearly rate increases. Run it with your own numbers.
Homes in Rockwall
- Owner-occupied homes
- 72%
- Single-family detached
- 78%
- Median home value
- $412k
- Median year built
- 2003
- Population
- 51,168
Census ACS 2020–2024.
Installers working in Rockwall
Public installation records for Texas don't name installers, so we can't rank local companies here. Browse installers in Texas.
Always verify the license and get at least three quotes. Compare quotes side by side.
Questions about solar in Rockwall
Is solar worth it in Rockwall, TX?
For a typical home in Rockwall, solar is worth it at 2026 prices: a 4.4 kW system costs about $12,740 after state incentives, saves about $989 in year one and pays back in about 12.6 years. Enter your address for an estimate based on your roof and bill.
How much solar power does a system produce in Rockwall?
About 1,524 kWh per year for each kW of panels on a south-facing roof, based on PVWatts and local weather. That's 0% more than the Texas average. East- or west-facing roofs produce roughly 10–20% less.
Who is the electric utility in Rockwall?
Most homes in Rockwall are served by Grayson-Collin Electric Cooperative, at about 17.7¢ per kWh on average. Some areas are served by Oncor, Farmers Electric Cooperative.
How much do solar panels cost in Rockwall?
A fair cash price is around $2.60 per watt before incentives, so about $12,740 for a 4.4 kW system. There's no federal tax credit for homeowners who buy in 2026.
Nearby
- Rowlett 15.6 yrs
- Sachse 15.7 yrs
- Wylie 15.5 yrs
- Garland 15.5 yrs
- Forney 12.6 yrs
- Mesquite 15.9 yrs
- Richardson 15.5 yrs
- Balch Springs 12.7 yrs
- All of Texas
Data: PVWatts (National Laboratory of the Rockies), EIA-861 2025 adjusted to 2026, U.S. Census ACS, LBNL Tracking the Sun, state policy research as of October 2026.