Solar in Castle Rock, CO
With CORE Electric Cooperative's electricity at about 16.5¢ per kWh and 1,608 kWh of sun per kW, solar is worth it for a typical Castle Rock home today: about a 11.8-year payback.
- Payback, typical home
- 11.8 yrsColorado: 12.4 yrs
- 25-year net
- $28,904after paying $19,565
- Sun
- 1,608kWh per kW per year
- Electricity
- 16.5¢8% below U.S. average
A typical Castle Rock home, by the numbers
| Utility | CORE Electric Cooperative |
|---|---|
| Electricity use | 843 kWh a month |
| Best-value system | 6.3 kW, about 15 panels, 10,131 kWh a year (100% of use) |
| Cost | $19,565 |
| First-year savings | $1,606 |
| Payback | 11.8 years |
| Exported power | Full retail net metering (Colorado rule) |
Cash purchase, no federal credit, 2.6% yearly rate increases. Run it with your own numbers.
Homes in Castle Rock
- Owner-occupied homes
- 79%
- Single-family detached
- 74%
- Median home value
- $653k
- Median year built
- 2007
- Population
- 79,123
Census ACS 2020–2024.
Installers working in Castle Rock
Public installation records for Colorado don't name installers, so we can't rank local companies here. Browse installers in Colorado.
Always verify the license and get at least three quotes. Compare quotes side by side.
Questions about solar in Castle Rock
Is solar worth it in Castle Rock, CO?
For a typical home in Castle Rock, solar is worth it at 2026 prices: a 6.3 kW system costs about $19,565 after state incentives, saves about $1,606 in year one and pays back in about 11.8 years. Enter your address for an estimate based on your roof and bill.
How much solar power does a system produce in Castle Rock?
About 1,608 kWh per year for each kW of panels on a south-facing roof, based on PVWatts and local weather. That's 2% more than the Colorado average. East- or west-facing roofs produce roughly 10–20% less.
Who is the electric utility in Castle Rock?
Most homes in Castle Rock are served by CORE Electric Cooperative, at about 16.5¢ per kWh on average. Some areas are served by Xcel Energy Colorado, Mountain View Electric Association.
How much do solar panels cost in Castle Rock?
A fair cash price is around $3.05 per watt before incentives, so about $19,565 for a 6.3 kW system. There's no federal tax credit for homeowners who buy in 2026.
Nearby
- Parker 12.3 yrs
- Highlands Ranch 12.5 yrs
- Centennial 12.3 yrs
- Littleton 12.7 yrs
- Columbine 12.9 yrs
- Ken Caryl 12.9 yrs
- Englewood 12.5 yrs
- Dakota Ridge 12.9 yrs
- All of Colorado
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.