Wikipedia

Solar power in Colorado

Solar power in Colorado refers to the generation of electricity from sunlight across the state, encompassing utility-scale solar farms, commercial installations, and residential rooftop systems. Colorado ranks among the top ten states in the United States for total solar generation capacity, driven by its high elevation, over 300 days of sunshine annually, and a strong policy framework dating to 2004.[1]

Solar roof installation, Grand Junction
Fitting solar panels, Norwood

As of 2025, solar energy accounts for approximately 12% of Colorado's total electricity generation, including both utility-scale and behind-the-meter sources.[2] Colorado entered the national top ten for solar generation in 2024, fueled by a near-tenfold increase in solar generation since 2015.[3]

The National Renewable Energy Laboratory (NREL), headquartered in Golden, Colorado, plays a significant role in advancing solar technology research and development nationally.[4]

History

edit

Colorado has been at the forefront of solar energy policy in the United States since the early 2000s. In 2004, Colorado voters passed Amendment 37, making Colorado the first state in the nation to establish a Renewable Portfolio Standard (RPS) by ballot initiative, requiring investor-owned utilities to source a portion of their electricity from renewable energy.[5]

The Alamosa Photovoltaic Power Plant, completed in 2007 with a capacity of 7.7 MW, was among the first utility-scale solar photovoltaic installations in the United States.[6] Located in the San Luis Valley — one of the sunniest regions in North America — the facility demonstrated the viability of utility-scale PV at a time when the technology was still emerging commercially.

Throughout the 2010s, Colorado's solar industry expanded rapidly. The Comanche Solar project near Pueblo, completed in 2016, added 120 MW of capacity — enough to power approximately 24,000 homes — and was for a time the largest solar installation in the state.[7]

By 2017, Colorado's cumulative installed solar capacity approached 1 gigawatt (GW), placing it 12th nationally.[1] By 2021, that figure had grown to 2,183 MW.[8]

Solar resources

edit

Colorado's geography and climate make it exceptionally well-suited for solar energy generation. The state averages more than 300 sunny days per year, and its high altitude — much of the Front Range sits above 5,000 feet (1,500 m) — reduces atmospheric filtering of solar radiation, increasing irradiance compared to lower-elevation states at similar latitudes.[4]

The San Luis Valley in south-central Colorado is one of the highest-irradiance regions in the continental United States and has become a hub for utility-scale solar development. The valley's flat terrain, minimal cloud cover, and proximity to transmission infrastructure have attracted multiple large-scale projects.[8]

Policy and regulation

edit

Renewable Energy Standard

edit

Colorado's Renewable Energy Standard (RES), originally established by Amendment 37 in 2004 and subsequently strengthened by the state legislature, requires investor-owned utilities to obtain at least 30% of their retail electricity sales from renewable energy sources.[5] Rural electric cooperatives and municipal utilities are subject to a separate, lower standard.

Net metering

edit

Colorado law requires investor-owned utilities to offer net metering to customers with qualifying renewable energy systems.[9] Under the program, excess generation is credited to the customer's account and carried forward indefinitely until service termination.

Federal incentives

edit

Colorado solar customers are eligible for the federal Investment Tax Credit (ITC), which provides a 30% tax credit on the installed cost of solar energy systems through 2032 under the Inflation Reduction Act of 2022.[10] Commercial projects may also qualify for Modified Accelerated Cost Recovery System (MACRS) depreciation, which allows the cost of solar equipment to be depreciated over five years for federal tax purposes.

Senate Bill 25-299

edit

In 2025, the Colorado General Assembly passed Senate Bill 25-299, which established new consumer protection standards for residential solar contracts. The law mandates standardized disclosures, minimum warranty terms, and clearly defined cancellation rights for customers entering solar purchase or lease agreements.[11]

Installed capacity

edit

Colorado's installed solar capacity has grown substantially over the past two decades:

YearInstalled Capacity (MW)
200714.6
2017~985
20212,183
2022~2,700
2024~4,000 (estimated)

Sources: U.S. Energy Information Administration;[8] Solar Energy Industries Association[1]

Generation

edit
Colorado electricity production by type
Colorado solar power from 2009 to 2025
Total solar generation in Colorado (GWh)[12]
Year Total % growth Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
2014 606 38 40 52 53 58 61 57 61 54 52 44 36
2015 643 5.8% 34 39 57 59 58 66 62 64 60 51 45 48
2016 999 35.6% 47 57 71 74 87 91 92 80 120 115 87 80
2017 1,485 32.7% 75 85 132 146 159 169 138 143 134 128 91 85
2018 1,653 10.2% 91 101 137 156 175 185 169 166 158 124 104 87
2019 1,852 10.7% 100 106 152 173 186 204 201 199 172 158 110 92
2020 2,204 16.0% 117 121 179 213 249 241 245 212 203 166 143 116
2021 2,790 26.6% 132 143 196 227 242 307 312 304 276 231 224 198
2022 3,819 26.9% 217 250 318 368 391 373 395 383 347 310 238 229

Utility-scale solar projects

edit

Several large-scale solar installations operate across Colorado:

Alamosa Photovoltaic Power Plant — Located in the San Luis Valley, the 7.7 MW facility completed in 2007 was among the first utility-scale photovoltaic plants in the United States.[13]

Comanche Solar — A 120 MW installation near Pueblo, completed in 2016, capable of powering approximately 24,000 homes.[7]

Pike Solar — As of 2023, Pike Solar is the largest solar facility in the Colorado Springs Utilities electric system, consisting of approximately 400,000 photovoltaic panels with a capacity of 175 MW — sufficient to power roughly 46,300 homes annually. The facility began commercial operation in December 2023.[14]

Tri-State Generation and Transmission — Tri-State Generation and Transmission Association, which serves rural electric cooperatives across Colorado, Wyoming, Nebraska, and New Mexico, expanded its solar portfolio significantly in 2025, with plans to serve members with 680 MW of solar capacity across eight facilities — collectively meeting the equivalent energy needs of nearly 200,000 homes.[15]

Residential and commercial solar

edit

Residential solar adoption in Colorado has accelerated since the mid-2010s, driven by declining panel costs, favorable net metering policies, and the federal ITC. The Denver metropolitan area, Colorado Springs, and Fort Collins represent the largest markets for rooftop solar installation in the state.[1]

Colorado's community solar program allows customers who cannot install rooftop systems — including renters and those with shaded or structurally unsuitable roofs — to subscribe to a share of an off-site solar garden and receive bill credits for their portion of the output.[9]

Battery storage

edit

Battery storage systems are increasingly paired with solar installations across Colorado, both at the utility scale and in residential and commercial applications. Standalone battery storage systems installed after December 31, 2022 qualify for the 30% federal ITC under the Inflation Reduction Act, independent of whether they are paired with solar generation.[10]

Research and development

edit

The National Renewable Energy Laboratory (NREL), located in Golden, Colorado, is the United States government's primary laboratory for renewable energy and energy efficiency research. NREL conducts research in photovoltaic materials, concentrated solar power, grid integration of solar energy, and solar resource assessment.[4]

Colorado State University, the University of Colorado, and the Colorado School of Mines also conduct research related to solar energy, materials science, and grid systems.

Environmental considerations

edit

Solar energy generation produces no direct greenhouse gas emissions during operation. The widespread adoption of solar power in Colorado contributes to the state's goals for reducing carbon emissions under the Colorado Clean Energy Plan and broader legislative commitments to achieve 100% clean electricity by 2040.

Colorado's climate presents specific environmental considerations for solar panels. Hailstorms, which are frequent on the Front Range and Eastern Plains, can damage solar panels. Modern photovoltaic panels are impact-tested to IEC 61215 standards, requiring resistance to hailstones up to 25 mm in diameter at 23 meters per second.

See also

edit

References

edit
  1. 1 2 3 4 "Colorado Solar and Storage". Solar Energy Industries Association. Retrieved 2026-05-05.
  2. ↑ "Colorado Electricity Generation Mix 2025". Low Carbon Power. Retrieved 2026-05-05.
  3. ↑ "State of Renewables 2025 Dashboard". Environment America. Retrieved 2026-05-05.
  4. 1 2 3 "About NREL". National Renewable Energy Laboratory. Retrieved 2026-05-05.
  5. 1 2 "Colorado Amendment 37 (2004)". Ballotpedia. Retrieved 2026-05-05.
  6. ↑ "Colorado State Energy Profile". U.S. Energy Information Administration. Retrieved 2026-05-05.
  7. 1 2 "Comanche Solar Project". Xcel Energy. Retrieved 2026-05-05.
  8. 1 2 3 "Colorado Electricity Profile". U.S. Energy Information Administration. Retrieved 2026-05-05.
  9. 1 2 "Net Metering — Colorado". DSIRE. Retrieved 2026-05-05.
  10. 1 2 "Residential Clean Energy Credit". Internal Revenue Service. Retrieved 2026-05-05.
  11. ↑ "SB25-299". Colorado General Assembly. Retrieved 2026-05-05.
  12. ↑ "Electricity Data Browser". www.eia.gov. Retrieved 2022-01-10.
  13. ↑ "SunEdison Activates Largest Photovoltaic Power Plant for Xcel Energy". arizonaenergy.org. December 17, 2007. Retrieved February 20, 2019.
  14. ↑ "Electric System — Pike Solar". Colorado Springs Utilities. Retrieved 2026-05-05.
  15. ↑ "Tri-State Purchases Two Western Colorado Solar Projects from JUWI". Tri-State Generation and Transmission Association. Retrieved 2026-05-05.
edit
Retrieved from "https://en.wikipedia.org/w/index.php?title=Solar_power_in_Colorado&oldid=1353037079"