Colorado vs Washington Solar Comparison
Colorado gets more sun (5.5 hrs/day) while Colorado has the faster payback (8.2 years).Colorado offers higher 20-year savings at $34,800.
Colorado
5.5 hrs
8.2yr payback
$34,800
20yr savings
Washington
3.5 hrs
12.5yr payback
$22,800
20yr savings
Side-by-Side Comparison
| Metric | Colorado | Washington |
|---|---|---|
| Peak Sun Hours | 5.5 hrs | 3.5 hrs |
| Cost per Watt | $3.05 | $3.10 |
| 6kW System Cost | $18,300 | $18,600 |
| Federal Tax Credit | 30% | 30% |
| State Tax Credit | None | None |
| State Rebate | $2,000 | None |
| Net Metering | Full Net Metering | Full Net Metering |
| Electricity Rate | 15.56¢/kWh | 11.26¢/kWh |
| Payback Period | 8.2 years | 12.5 years |
| 20-Year Savings | $34,800 | $22,800 |
Verdict
Colorado is the better state for solar ROI with $34,800 in 20-year savings and a 8.2-year payback period. Colorado has more sun exposure at 5.5 hrs/day, making it ideal for maximum energy production. Both states qualify for the 30% federal solar tax credit.
Frequently Asked Questions
Is solar better in Colorado or Washington?
Colorado gets more sun (5.5 peak hours/day vs 3.5). Colorado has a faster payback (8.2 years) and Colorado offers higher 20-year savings ($34,800).
How do solar costs compare between Colorado and Washington?
A 6kW system costs $18,300 in Colorado vs $18,600 in Washington before incentives. Both qualify for the 30% federal tax credit.
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Data verified March 2026 · Source: NREL, DSIRE, EIA