Castle Rock city reference
Solar in Castle Rock, checked against utility math.
A city-level guide for Douglas County homeowners comparing quotes, system size, incentive timing, and CORE Electric Cooperative billing assumptions.
- Reference ZIP
- 80104
- Utility
- CORE
- Focus
- Net metering + Solar*Rewards
Castle Rock is a Douglas County community between Denver and Colorado Springs with a population of about 74,000, served by CORE Electric Cooperative. Owner-occupants hold roughly 78.5 percent of its homes, and the median home value is about $577,500 with a median construction year of 2005. A 7 kW south-facing array in Castle Rock is modeled to produce about 1,606 kWh per kW installed, or roughly 11,244 kWh per year. Because CORE is a member-owned cooperative rather than Xcel Energy, its rate and program terms should be confirmed directly with the cooperative.
Local numbers
The Castle Rock baseline
A 7 kW south-facing system in Castle Rock produces about 11,250 kWh/year per NREL PVWatts. Pre-incentive install cost runs $18,900 to $21,000, with cash payback around 10 to 11 years before financing markup.
11,250 kWh/year
Annual production
PVWatts v8, 7 kW south-facing.
~$18,900 to $21,000
Net cash cost
After incentives, before financing.
10 to 11 years
Cash payback
No dealer-fee markup.
15 to 19 years
Financed payback
With typical dealer fees.
Diagnostic path
Check the Castle Rock quote from four angles.
Start with fit, then pressure-test price, incentives, and installer risk before a homeowner signs.
- 01 Is it worth it? → Diagnostic: how to know if your Castle Rock home is a good fit for solar, and what to verify before signing. Real production numbers, current rates, no inflated assumptions.
- 02 Typical cost and payback → Sized for a Castle Rock median home, with CORE Electric Cooperative-adjusted production from NREL PVWatts and current Standard retail-rate net metering + Solar*Rewards production incentive rates.
- 03 Incentives → Solar*Rewards values plus CORE Electric Cooperative programs. Federal credit context after the December 2025 expiration.
- 04 How to pick an installer → Educational buyer's guide for Castle Rock: red flags, what to verify, questions to ask before signing.
Utility context
The bill rules are local.
Most of Castle Rock is served by CORE Electric Cooperative. Net metering, rate trajectory, and program timing differ by utility; the Colorado state hub covers the cross-utility picture.