Solar panels in Denver, CO: cost and payback (2026)
Solar panels in Denver cost about $23,200 installed for an 8 kW system, and $23,200 net. There is no federal homeowner credit in that figure — the 30% credit ended for systems placed in service after December 31, 2025. At 15¢ per kWh that system offsets roughly $158 a month and pays itself back in 12.3 years — assuming Xcel Energy, which serves most of Denver, credits what you export.
Cost, rate and sun hours are Colorado statewide figures from EIA and NREL — we do not publish a separate Denver rate or sun-hour value we cannot source. The utility is the part that is genuinely local, and it is the part that changes the answer most. Incentives are modelled for today’s date, so nothing expired is counted.
Xcel Energy: what it means for solar in Denver
Xcel Energy serves most of Denver. It is investor-owned utility — regulated by the state public utility commission, so the statewide net metering or net billing rule below is the one that applies to you, and any change to it goes through a public docket you can read.
Because Xcel Energy answers to the state commission, the Colorado rule is the one that governs your exports: Colorado still requires full retail net metering at investor-owned utilities, with excess credits rolling forward month to month.
Whichever it is, this is the first question to settle and the one installers are least specific about. Ask for the rider or tariff name, the per-kWh export credit, how long that credit is locked for, and the current interconnection turnaround — in the written quote, not in conversation. Service territories cut across city limits, so confirm against the name at the top of your own bill.
Cost by system size in Denver
Within one city, quotes still spread. A steep or cut-up roof costs more in labour than a simple south-facing plane. A main service panel at capacity adds a four-figure upgrade before a single module goes up. Two storeys costs more than one. None of that shows up in a per-watt average, which is why the table below is a starting point rather than a quote.
| System | Panels | Gross cost | Net cost | Yr 1 savings | Payback |
|---|---|---|---|---|---|
| 6 kW | 15 | $17,400 | $17,400 | $1,419 | 12.3 yrs |
| 8 kW | 20 | $23,200 | $23,200 | $1,892 | 12.3 yrs |
| 10 kW | 25 | $29,000 | $29,000 | $2,365 | 12.3 yrs |
Modelled, not quoted. Production is system size × 5.4 peak sun hours × 365 days × 0.8 for inverter, wiring, soiling and heat losses. Savings value that production at 15¢ per kWh and hold the rate flat for year one. Panel count assumes 400 W modules. Your roof, your shade and your usage move all of it.
No federal credit is in these numbers. The 30% homeowner credit (IRC Sec. 25D) ended for systems placed in service after December 31, 2025. Net cost above is gross cost minus whatever state or local money is still open — nothing else. If a quote knocks 30% off and calls it a federal credit, ask which statute they are citing.
Permits and approvals in Denver
Two approvals, two bodies. The Denver building department issues the electrical and structural permit. Xcel Energy issues permission to operate once the work is inspected and, where required, the meter is swapped. Nothing generates a single legal kWh until the second one lands, and the two queues do not move at the same speed.
Permit fees and turnaround vary by jurisdiction and we do not track them, so we are not going to print a number we cannot source. Make the installer put the permit cost and the expected wait for both approvals in the written quote instead of leaving them as a line you discover afterwards.
Incentives and the full state picture: solar panels in Colorado.
Questions from Denver
How much do solar panels cost in Denver?
A 8 kW system in Denver models at $23,200 installed and $23,200 net, at the Colorado average of $2.90 per watt. There is no federal homeowner credit in that — the 30% credit ended for property placed in service after December 31, 2025. Quotes inside one city still vary by several thousand dollars depending on roof pitch, panel choice and whether the main service panel needs upgrading.
Who is the electric utility in Denver?
Xcel Energy serves most of Denver. It is investor-owned utility — regulated by the state public utility commission, so the statewide net metering or net billing rule below is the one that applies to you, and any change to it goes through a public docket you can read. That matters more than it sounds: your utility, not your installer and not the state, sets what an exported kWh is worth and how long permission to operate takes. Service territories cut across city limits, so check the name at the top of your own bill.
Does Xcel Energy pay for solar you send back to the grid?
Xcel Energy is an investor-owned utility, so the Colorado rule applies to it: Colorado still requires full retail net metering at investor-owned utilities, with excess credits rolling forward month to month. Ask for the specific rider name and the credit rate in writing before you sign — it is a tariff, and tariffs get refiled.
Is solar still worth it in Denver now the federal tax credit is gone?
On these numbers it pays back in about 12.3 years with no federal credit at all — $23,200 net against roughly $1,892 of electricity offset a year. Colorado runs no state rebate either, so $23,200 is the whole price. What decides it in Denver is the 15¢ per kWh you pay now and what Xcel Energy credits your exports at, not the subsidy that ended.
Does shade in Denver kill the numbers?
Heavy shade does, and no amount of panel technology fixes it. Partial afternoon shade usually costs a modest percentage of production, which the modelling above does not attempt to guess at. If mature trees cover the south face of your roof for most of the day, the honest answer is not to bother.
Where to look next
Incentives, electricity rates, net metering rules and the full Colorado picture live on the state page: solar panels in Colorado.