Solar Calculator for Colorado: Costs, Incentives & ROI
Colorado combines an exceptional solar resource along the Front Range with a supportive regulatory environment and strong property tax protection, making it one of the most economically attractive solar markets in the mountain west. Denver and the suburban corridor running from Fort Collins to Pueblo average five and a half to six peak sun hours per day — well above the national median — and the high elevation of Colorado's urban centers reduces atmospheric attenuation, allowing panels to capture more direct and diffuse radiation per square meter than equivalent latitude cities at sea level. Xcel Energy, the state's largest investor-owned utility serving the Denver and Boulder metropolitan areas, northern Colorado, and the southern Front Range, participates in Colorado's net metering program governed by the Colorado Public Utilities Commission under Colorado Revised Statutes section 40-2-124. Black Hills Energy serves the Pueblo and southeast Colorado region under a separate service territory with its own rate structure but the same state-mandated net metering requirements. Colorado offers a 100-percent property tax exemption for residential solar under C.R.S. § 39-3-118.5, and the state-level sales tax exemption on solar energy devices under C.R.S. § 39-26-724 reduces the purchase cost before the federal Investment Tax Credit is applied. Xcel previously offered the Solar*Rewards residential incentive program, though residential capacity has been fully subscribed; solar economics in Colorado now rest primarily on net metering self-consumption value, the federal ITC, and state tax protections. Use the calculator below to estimate your payback period and long-term savings based on your ZIP code and energy usage.
Incentive data updated: May 2026(may be outdated)
Average Solar Cost in Colorado
Average installed solar costs in Colorado typically range from $2.65 to $3.10 per watt before incentives for residential systems, based on Lawrence Berkeley National Laboratory and EnergySage data for the mountain west market. A typical six-kilowatt system therefore costs roughly $15,900 to $18,600 before the federal Investment Tax Credit — slightly below the national residential average, reflecting Colorado's mid-sized but competitive installer market and the streamlined permitting processes in suburban Arapahoe, Jefferson, and Larimer counties. The thirty-percent federal ITC reduces a typical system's net cost to approximately $11,100 to $13,000. Colorado's state-level sales tax exemption on solar energy devices under C.R.S. § 39-26-724 provides additional savings, though some county and municipal governments in Colorado assess their own local sales taxes and may or may not apply an exemption — verify your specific county treatment before finalizing your budget. The 100-percent property tax exemption under C.R.S. § 39-3-118.5 ensures that the appraised value added by a solar installation does not increase annual property taxes, which is particularly meaningful in rapidly appreciating metro Denver and Boulder markets. Battery storage added alongside solar may also qualify for the federal ITC at the 30-percent rate if charged primarily from the solar array.
- Avg. installed cost
- $2.88/W
- Typical 6 kW system
- $15,900–$18,600
Top Solar Incentives in Colorado
Live incentive data not currently available for Colorado. See the federal incentive guidance via our Solar Tax Credit Calculator.
Electricity Rates in Colorado
Residential electricity rates in Colorado are close to the national average, with the 2025 statewide average running near 13 to 14 cents per kilowatt-hour according to EIA data. Xcel Energy residential customers in the Denver metropolitan area and northern Front Range corridor pay standard rates in the 13 to 15 cent range depending on time of use. Black Hills Energy customers in the Pueblo and southeast region typically see rates in the 12 to 14 cent range. Colorado's moderate electricity rates mean that solar economics depend somewhat more on system production volume — the high Front Range solar resource compensates for the lower per-kilowatt-hour offset value compared to high-rate states like Massachusetts or California. Under Colorado's net metering rules, excess residential solar production is credited at the full retail avoided-cost rate up to 120 percent of the customer's annual electricity consumption; excess above that threshold is credited at the utility's lower avoided-cost rate. Right-sizing the system to match annual consumption generally produces better financial returns than aggressively oversizing for export. Xcel's standard residential rates include a fixed monthly customer charge that is not reduced by solar production, which affects the economics of very small systems proportionally more.
Peak Sun Hours in Colorado
Colorado's Front Range and eastern plains average between 5.5 and 6.0 peak sun hours per day, among the highest in the continental United States outside the desert southwest. The state's high elevation — Denver sits at 5,280 feet and many suburban Front Range cities are higher — reduces atmospheric path length for incoming solar radiation and results in higher direct normal irradiance than equivalent-latitude cities at sea level. The mountain resort towns of Aspen, Vail, and Telluride lie at higher elevations and receive strong irradiance despite more variable winter cloud cover from orographic precipitation. Colorado's thin, dry air also means temperatures are typically lower than in Arizona or Nevada cities with comparable solar resource, reducing heat-related panel derate. The combination of high irradiance and manageable temperatures makes Colorado one of the most productive solar environments in the mountain west. NREL's PVWatts models ZIP-code-level production using local climate data that captures elevation and regional weather patterns for your specific location.
Example ROI for a 6 kW System
- Estimated annual savings
- $1,380
- Payback period
- 10.5 years
- 25-year net savings
- $24,500
Run a personalized estimate with your ZIP code using the Solar ROI Calculator.
Major Cities in Colorado
- Denver80203
- Colorado Springs80903
- Aurora80010
- Fort Collins80521
- Boulder80302
Common Questions About Solar in Colorado
How does Colorado net metering work under the current rules?
Colorado's net metering law, codified at C.R.S. § 40-2-124 and administered by the Colorado Public Utilities Commission, requires investor-owned utilities including Xcel Energy and Black Hills Energy to credit excess residential solar production at the full retail rate up to 120 percent of the customer's annual electricity consumption. Production above that threshold is credited at the utility's avoided-cost rate rather than the retail rate. Credits accumulate on the monthly bill and roll forward. If a customer's system consistently produces more than the 120-percent threshold, they effectively export surplus at a lower rate, which can marginally reduce returns on oversized systems. Net metering also applies to qualifying community solar subscribers under Colorado's community solar program.
What are the Colorado property tax and sales tax exemptions for solar?
Colorado Revised Statutes section 39-3-118.5 provides a 100-percent property tax exemption for residential renewable energy equipment, including rooftop solar. The exemption applies regardless of how much assessed value the installation adds to the property — the solar equipment is valued at zero for property tax purposes. Separately, C.R.S. § 39-26-724 exempts solar energy equipment from Colorado state sales and use tax. However, Colorado allows county and municipal governments to impose their own local sales taxes, and some jurisdictions apply their own exemptions while others do not — verify your specific county and city treatment before assuming the full exemption stack applies. Together, the state exemptions represent meaningful savings on a typical installation.
What is Xcel Energy's Solar*Rewards program and is it still available?
Xcel Energy's Solar*Rewards program was a performance-based incentive that paid residential solar owners a per-kilowatt-hour production payment for generation from their system. The program was extremely popular and the residential incentive capacity was fully subscribed — the waitlist was closed before new applications could be accepted. New residential installations in Xcel territory do not currently receive Solar*Rewards payments. Solar economics in Xcel service territory now depend on net metering credits at the retail rate up to the 120-percent threshold, the federal 30-percent Investment Tax Credit, and the state property and sales tax exemptions. The combination still produces attractive economics for most Front Range homeowners given the region's above-average solar resource.
Does Colorado's high altitude improve solar production?
Yes. High altitude reduces the atmospheric path length solar radiation must travel before reaching a rooftop panel. Denver at 5,280 feet sits significantly above sea level, and the thinner atmosphere means less scattering and absorption of incoming photons. Studies comparing equivalent-latitude cities at high and low elevations consistently show higher irradiance at altitude. Colorado's arid continental climate also produces very low aerosol concentrations outside of occasional wildfire smoke events, further reducing diffuse-sky losses. Heat derate is also less severe in Colorado than in Arizona or Nevada due to cooler ambient temperatures, particularly in spring and fall, so a Colorado system realistically captures close to its nameplate production advantage.
Is battery storage worth adding to a Colorado solar system?
Battery storage economics in Colorado depend primarily on whether your utility offers time-of-use rates with meaningful peak and off-peak differentials and whether backup power during grid outages is a priority. Xcel Energy offers time-of-use rate options for residential customers on which evening peak rates can be substantially higher than overnight off-peak rates; pairing a battery with solar to shift production from midday to evening peak consumption can improve returns. For flat-rate customers, the financial case for storage is more modest, and the main benefit becomes backup power for Colorado's increasingly frequent severe thunderstorm and high-wind outage events. The federal Investment Tax Credit at 30 percent applies to battery storage installed alongside solar.