25-year savings projection for Colorado
This projection starts from Colorado's assumed $0.16/kWh electricity rate and 1,490 kWh/kW of annual production, then grows savings by 3% a year as electricity prices rise and reduces output by 0.5% a year as panels degrade.
| Year | Annual savings | Cumulative savings | vs. $23,400 cost |
|---|---|---|---|
| Year 1 | $1,572 | $1,572 | −$21,828 |
| Year 5 | $1,734 | $8,258 | −$15,142 |
| Year 10 | $1,960 | $17,594 | −$5,806 |
| Year 15 | $2,216 | $28,150 | +$4,750 |
| Year 20 | $2,505 | $40,084 | +$16,684 |
| Year 25 | $2,833 | $53,576 | +$30,176 |
A simple, undiscounted projection — it does not apply a discount rate, financing interest, inverter replacement (commonly needed once in 25 years), maintenance, or any change in home value. Treat it as a shape, not a forecast. See methodology.
Why savings look like this in Colorado
High elevation and strong sun can support good production despite seasonal snowfall.
The single biggest variable is what your utility pays for exported power. Colorado retains retail-rate net metering for investor-owned utilities such as Xcel Energy, one of the stronger export policies in the country. Co-ops and municipal utilities set their own terms.
What would change this number
- Your actual rate. This uses a $0.16/kWh Colorado average. If you pay more, savings scale up roughly proportionally.
- Self-consumption. We assume 68% of output is used on site at retail value and the rest exported at 45% of retail. Households home during the day, or with a battery, do better.
- Electricity price growth. At 3% a year, savings nearly double by year 25. Slower growth meaningfully reduces lifetime return.
- Incentives. Colorado's main program — utility and municipal rebates plus full tax exemptions — reduces net cost and shortens break-even. See Colorado incentives →
- Financing. A cash purchase earns the return above. A loan shifts it — interest can consume a large share of lifetime savings.
Frequently asked questions
How much can you save with solar panels in Colorado?
An 8 kW system in Colorado could save roughly $1,572 in the first year — about $131 a month — and around $53,576 across 25 years, assuming electricity prices rise 3% a year and panel output declines 0.5% a year. Against a midpoint installed cost of $23,400, that is a net gain of about $30,176.
What is the ROI on solar panels in Colorado?
On these assumptions, roughly 129% over a 25-year system life — $30,176 of net savings on a $23,400 system. That is a simple, undiscounted return: it ignores financing interest, the time value of money, and any effect on home resale value. A cash purchase and a loan produce very different numbers.
How long does it take for solar to pay for itself in Colorado?
Around year 13, when cumulative savings first exceed the $23,400 installed cost. A simple payback that ignores rising electricity prices gives a wider range of 13–17 years.
Do solar savings in Colorado include the federal tax credit?
No. The 30% federal residential clean energy credit (Section 25D) ended for systems installed after December 31, 2025, so none of these figures include it. Any savings projection you see elsewhere that still applies 30% to a 2026 purchase is overstating the return.
What most affects solar savings in Colorado?
Three things, in order: your utility's export compensation (Colorado retains retail-rate net metering for investor-owned utilities such as Xcel Energy, one of the stronger export policies in the country.), how much of the output your household consumes on site rather than exporting, and your actual electricity rate versus the 0.16/kWh state assumption used here. Utility and municipal rebates plus full tax exemptions can improve the result further.
Where these numbers come from
State assumptions are informed by public data and reviewed periodically (September 2026):