What Solar Costs in Colorado in 2026

Solar is priced per watt of panel capacity (DC) because it’s the only number that lets you compare two quotes for different-sized systems. Our installed range is $2.80–$3.25 per watt. That includes panels, inverters or microinverters, racking, wiring, permits, the utility interconnection paperwork and our own crews doing the work.

If a quote doesn’t show a per-watt number, divide the total price by the system size in watts. A $30,000 quote for a 6 kW system is $5.00 per watt, and that should prompt a question about what else is bundled in. Sometimes the answer is a battery or a roof; sometimes it’s a sales commission.

A 5 kW system at $2.80–$3.25/W comes to $14,000–$16,250. A 7 kW system comes to $19,600–$22,750. A 10 kW system comes to $28,000–$32,500. These are before incentives and before any utility rebate that applies in your territory.

System size is set by your annual electricity use, your roof space and your utility’s sizing rules, not by what sounds like a good round number. Your bill’s 12- or 13-month usage history is the starting point. Homes adding an EV or a heat pump often size up to cover the new load, which is worth planning now rather than expanding later — in some territories, such as Longmont, expanding an older system changes how its exports are credited.

Larger systems usually land toward the lower end of the per-watt range because fixed costs — permitting, design, the electrical tie-in, the truck roll — are spread across more watts. Small systems land toward the top.

Roof complexity matters most on a typical house. A single south- or west-facing plane on a simple gable is the cheapest roof to work on; a cut-up roof with dormers, several small planes, steep pitch or tile adds labor and hardware. Roof condition matters too: if your shingles have less life left than the panels, we’ll tell you to do the roof first or together, because we don’t do remove-and-reinstall later.

Electrical panel capacity is the second big variable. Many older Colorado homes still have 100-amp panels, and adding solar (and especially a battery or EV charger) can require a panel upgrade or a supply-side connection. We price that separately and explain why it’s needed.

Ground mounts cost more than rooftop because of the foundation work and the trench back to the house. Trench length, soil and rock drive that number; on a rural or foothills lot, a long run through rocky ground is real money. In exchange, a ground mount can face due south at an ideal tilt, stay off an older roof and be cleared of snow by hand.

The §25D 30% federal credit for homeowner-owned systems ended for installations completed after December 31, 2025. If you buy a system outright today, there is no federal income-tax credit for the solar itself. Anyone still quoting you “30% back” on a purchased system is working from stale information.

Colorado exempts qualifying solar components — modules, inverters, racking, wiring and controls — from the state portion of sales and use tax, with no sunset. Local sales taxes are generally a separate question that each home-rule city decides. Some utilities and cities also offer rebates: Fort Collins Utilities, for example, has offered $300 per kW for solar up to $1,500, and Boulder refunds a portion of city sales tax on solar and battery projects. Verify current terms before you count on any of them; our incentives guide covers them in more detail.

Cash is the cheapest way to own solar over its life because there’s no interest. For households that would rather keep savings liquid, we offer two loan paths. Colorado’s RENU program through Westerra Credit Union runs 7.74%–8.99% APR for up to 20 years. Concert Finance offers 8.99% for up to 25 years.

On a $21,000 system, a 20-year RENU loan at 7.74% works out to roughly $172 a month; at 8.99% over 20 years it’s about $189; a 25-year Concert loan at 8.99% is about $176. The longer term lowers the payment only slightly while adding years of interest — about $41,000 total paid over 20 years at 7.74% versus about $53,000 over 25 years at 8.99%. Whether a loan pencils out depends on how that payment compares with the electric bill it replaces, which in turn depends on your utility.

With a lease or a power purchase agreement (PPA), a third party owns the system on your roof and you pay a monthly amount or a per-kWh rate. The owner can still claim the federal §48E credit for systems placed in service by the end of 2027, and that value shows up as a lower price to you. Our lease and PPA offers typically come in 20–30% below retail utility rates, with payments usually between $125 and $240 a month and an annual escalator of 0–3%.

Read the escalator carefully. A 0% escalator means the payment stays flat; a 3% escalator compounds, so a $150 payment becomes roughly $270 by year 21. Also ask what happens if you sell the house — the buyer has to qualify to take over the agreement, or you buy it out. Neither option is bad, but you should know which one you’re signing up for.

Solar is a harder sell if your bill is already low, if the only usable roof faces north, if mature trees shade most of the day, or if you expect to move within a few years and are paying cash. It’s also less compelling in territories that credit exports at a low avoided-cost or value-of-solar rate unless you use most of your production yourself.

We’d rather tell you that on the first call than sell you a system that disappoints. Our quote checker and savings calculator will show you a range; a site visit tells you the rest.