The Colorado Solar Cheat Sheet

Colorado gets roughly 300 sunny days a year, and high elevation means thinner air and stronger sunlight. Cold, clear winter days are actually good for panels: photovoltaic cells produce more power when they are cool. The Front Range, the Western Slope and the San Luis Valley are among the best solar resources in the United States.

What makes Colorado different is not the sun. It is the rules. The state has more than 50 electric utilities, and each one credits solar exports differently. Two identical houses in Denver and Fort Collins have different solar economics because Xcel Energy and Fort Collins Utilities pay for exported power in different ways. The utility on your bill is the single most important fact about your project.

Sunny days

~300 per year statewide

Typical production

1,400–1,600 kWh per kW of panels per year on a good roof

Design realities

Hail on the Front Range, snow load in the mountains, wildfire-related outages in the foothills

The deciding factor

Your electric utility's export and rate rules

When your panels make more power than the house is using, the extra flows to the grid. How your utility values that power decides whether solar pays back in 10 years or 20. Investor-owned utilities (Xcel, Black Hills) follow Colorado's net-metering statute. Municipal utilities and rural co-ops set their own rules. Rules below were verified against published 2026 tariffs; always confirm before signing.

Compare quotes by price per watt: the total price before incentives divided by the system size in watts. It is the only fair way to compare a 6 kW quote with a 9 kW quote. Our installed pricing is $2.80/W–$3.25/W. Quotes above about $3.75/W deserve a second look.

• Watch for adders: main panel upgrades ($2,500–$4,500 is common), trenching for ground mounts, tile or metal roofs, and long conduit runs.
• A quote's "net cost after incentives" is only as good as the incentives it assumes. Check the next section.

The biggest change in years: the 30% federal residential solar tax credit (Section 25D) ended for systems completed after December 31, 2025. Any 2026 quote that still subtracts it is wrong. What remains is smaller but real.

• Find your annual usage in kWh. It is on your bill's usage chart, or take a typical monthly bill and divide by about $0.16 per kWh.
• Divide by 1,400–1,600 (the kWh one kW of panels makes per year on a good Colorado roof). That is your system size in kW.
• Divide the kW by 0.42 for a panel count (modern panels are about 420 W).
• Aim to cover 90–100% of usage. Over-production is usually credited below retail, and most utilities cap systems at 120–200% of usage.

Roof direction matters less than people think in Colorado: south is best, but southwest and west faces produce power later in the day, which is worth more under time-of-use rates. North faces rarely pay. Shade from pines and cottonwoods is the bigger problem, and it is measured, not guessed, on a site visit.

Without the 30% credit, a typical owned system in Colorado now pays for itself in roughly 12–18 years and then produces nearly free power for the rest of its 25–30-year life. Whether that is worth it depends on your bill, your utility and how long you plan to stay.

First-year savings, $150/month Xcel bill

About $1,300–$1,700 for a system sized to usage

Utility price growth we model

2–4% per year (a scenario range, not a forecast)

Panel output decline

About 0.5% per year

When solar usually does not pay

Bills under about $80/month, heavy shade, a north-only roof, a roof with under 10 years left, or plans to move within a few years without valuing the resale bump

A home battery does two jobs. It keeps the lights on during an outage, and it can shift your own solar power into the evening peak when power costs the most. In Xcel territory the 5–9 pm on-peak price is about 2.7× the off-peak price; in Fort Collins it is 3.3–3.6×; CORE charges for your single highest hour between 4 and 8 pm. Those are the places a battery earns money. Everywhere else, buy it for backup.

• Solar recharges the battery during the day, so multi-day outages are survivable if you manage loads.
• Colorado's 10% battery equipment credit applies for tax years through 2026.
• Motor loads (well pumps, A/C) need enough power (kW), not just energy (kWh). We check this on site.

A Level 2 charger (240 V) adds 20–40 miles of range per hour and costs $2,500–$3,000 installed. A typical Colorado driver (about 12,000 miles a year) uses roughly 3,500 kWh of electricity, which is about 2.5 kW of extra solar.

• Under time-of-use rates, charge overnight in the off-peak window unless you have a battery or work from home and can charge from midday sun.
• Bidirectional charging (V2H) lets some EVs power the house during an outage; SigEnergy's DC charger supports it with compatible vehicles.
• The federal home-charger credit (30C) ended for chargers placed in service after June 30, 2026.

Two separate approvals: a building or electrical permit from your city, county or the state electrical board, and an interconnection agreement from your utility. Your installer should handle both. Denver and a growing list of jurisdictions use SolarAPP+, which approves standard residential systems automatically. Unincorporated areas (Evergreen, for example) permit through the county.

• Roof age: panels last 25–30 years. If the roof has under 10 years left, replace it first or combine the jobs.
• Hail: modern panels are tested to withstand 1-inch hail at 50+ mph; ask for the panel's hail rating and the workmanship warranty (10 years or more is common). Insurance claims on hail damage are handled like any roof claim.
• Snow: panels shed snow on their own on a tilted roof and cold air improves output; a few snowy days a year are already in the production estimates.
• Composition shingle is the easiest roof. Tile and metal need different mounts and cost more. Flat roofs use ballasted racks.
• Ground mounts are common on rural and mountain properties with shaded or small roofs.

Colorado law voids any covenant that effectively bans solar. An HOA may set reasonable aesthetic rules, but only if they add no more than 10% to the cost or reduce output by no more than 10%. The association must decide on an application within 60 days. Submit the plan, keep the dates, and cite the statute if you hit resistance.

• It still subtracts a 30% federal tax credit. Ended for homeowners after 2025.
• Price per watt above about $3.75 for a standard roof.
• A lease or PPA escalator above 2.9% per year.
• A loan APR that looks too good; ask about dealer fees.
• A system sized well above your usage (over about 115%).
• Promised production above about 1,650 kWh per kW per year; even ideal Colorado roofs rarely beat 1,600.
• A workmanship warranty under 10 years.
• Vague scope: no mention of who pulls permits, handles interconnection, or pays for a panel upgrade.
• Pressure: "this price is only good today."

Commercial solar follows different math. A business bill usually has two parts: energy (kWh) and a demand charge based on the highest 15-minute draw in the month. Solar cuts the first; only a battery or load control reliably cuts the second. The federal commercial credit (48E) is still alive with deadlines, and businesses can also depreciate the system.

• 48E: 30% base credit for projects that began construction by July 4, 2026, or are placed in service by December 31, 2027; larger projects carry wage and domestic-content rules.
• Depreciation (MACRS, and bonus depreciation where available) is often worth as much as the credit to a profitable business.
• USDA REAP grants are paused in 2026; REAP guaranteed loans remain open for farms and rural small businesses.
• Tax-exempt organizations can receive the federal credit as a direct payment (elective pay) instead of a tax credit.

kW vs kWh

kW is power (how fast); kWh is energy (how much). A 7 kW system makes about 10,000 kWh a year in Colorado.

DC vs AC

Panels make DC; inverters convert it to AC for the house. System size is usually quoted in DC watts.

Net metering

Exported power earns credits that offset power you buy later. The credit rate varies by utility.

Time-of-use (TOU)

Electricity costs more in a peak window (5–9 pm for Xcel) and less the rest of the day.

Demand charge

A fee based on your highest short burst of use in a month, common for businesses and on CORE's residential rate.

Interconnection / PTO

The utility's approval to connect, and its permission to operate, which comes after inspection.

Microinverter vs string inverter

Microinverters sit under each panel (better for shade and monitoring); a string inverter is one box on the wall.

Degradation

Panels lose about 0.5% of output per year; warranties typically guarantee 85% or more at year 25.

Price per watt

Total price before incentives ÷ system watts. The one number to compare quotes with.

SolarAPP+

Automated permitting used by Denver and other jurisdictions for standard home systems.

• Find your utility on the bill and read its row in the utilities table above.
• Get your annual kWh from the bill's usage chart (or let our AI Bill Reader pull it from a photo).
• Run the numbers with real pricing, then get a site visit. We will tell you if solar does not pencil out.

AI Colorado Solar is Jeff Bunge Solar LLC (dba Discovery Clean Energy), a Colorado installer with our own crews, serving all 64 counties. Call or text 720-370-8056, or visit aicoloradosolar.com.