Solar panel cost in Longmont, CO (2026)
A typical Longmont home needs about a 5.9 kW system (~15 panels), costing roughly $17,110 upfront or $16,610 after state incentives. The 30% federal credit ended for purchases on Dec 31, 2025 (a lease/PPA can still pass it through). At 4.84 peak sun hours and Colorado's 14.6¢/kWh rate, it pays back in about 13.6 years and saves an estimated $24,761 over 25 years.
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Preset to Longmont's local sunlight. Adjust your monthly bill for a personalized estimate.
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| Annual electricity use | 8,384 kWh |
| Annual solar production | 8,338 kWh |
| Gross system cost | $17,110 |
| Federal tax credit (purchase) | Ended Dec 2025 |
| State / local incentives | – $500 |
| 30% via lease/PPA instead | ~$5,133 value |
| CO₂ avoided per year | 2.9 tons (~48 trees) |
Estimates only — not a quote or financial advice. See our methodology.
What makes Longmont different
Longmont (population ~92,088) gets 4.84 peak sun hours per day — that's 7% less sunny than the Colorado average of 5.2. Slightly less local sunlight means panels produce a touch less than the state average, so sizing and orientation matter. Electricity rates, net metering, and incentives are set at the Colorado level: residents pay about 14.6¢/kWh, and full retail net metering + local utility rebates.
| City peak sun hours | 4.84 hrs/day |
| Recommended system size | 5.9 kW (~15 panels) |
| Installed price per watt | $3/W |
| Gross system cost | $17,110 |
| Federal tax credit (purchase) | Ended Dec 31, 2025 |
| State / local incentives | – $500 |
| Net cash cost | $16,610 |
| 30% credit via lease/PPA | ~$5,133 value |
| Annual energy produced | 8,338 kWh |
| Estimated year-1 savings | $1,217 |
| Payback period | 13.6 years |
| 25-year net savings | $24,761 |
| CO₂ avoided per year | 2.9 tons (~48 trees) |
Compare with the Colorado state average (5.5 kW, $15,450 net, 12.7-yr payback). Modeled estimates, June 2026 — not a quote. See methodology.
Compare real solar quotes in Longmont, CO
See actual prices from vetted local installers — including lease and PPA options that still capture the 30% credit in 2026. Free, no obligation.