
- Max. panel efficiency
- 22.8%
- Panel warranty
- 25 years
- Payment options
- Cash, loan
- Year founded
- 2007
The ConsumerAffairs Research Team compared popular solar companies on ratings and reviews, equipment options, warranties, availability and other factors to select the top picks for this guide. Our picks may be Authorized Partners that compensate us — this does not affect our evaluations but may impact the order in which companies appear. Read the full methodology for all the details on how we make solar company recommendations.
Company | Customer rating | Our pick for | Pro install | Max. panel efficiency | Panel warranty | NABCEP certified | Payment options | Year founded | |
---|---|---|---|---|---|---|---|---|---|
![]() | 4.4
296 reviews
296 reviews
| Top overall | 22.8% | 25 years | Cash, loan | 2007 | Get Started | ||
![]() | 4.2
3,179 reviews
3,179 reviews
| Solar leases | 22% | Varies | Cash, loan, lease | 2007 | Get Started | ||
![]() | 4.8
184 reviews
184 reviews
| DIY projects | Varies | Varies | Cash, loan | 2018 | Learn more |
Solar can be a big investment. Our goal is to highlight companies that are best equipped to meet most Boulderites’ energy needs.
We took a data-driven approach, informed by expert editors and considering the semi-arid climate, to choose the best solar companies in Boulder, Colorado, based on the following key features and respective weightings:
» MORE: Full methodology
Jump into our guides and start learning
We’ve talked to hundreds of Coloradans who have already gone through the solar panel installation process. Here’s what Boulder residents should look for when choosing a solar panel installation company. We’ll also touch on overall costs and ways to save with government incentives.
A typical residential solar panel installation costs $27,625 in Boulder.
Jump to insightSolar loans, leases and other programs make it easy to go solar with minimal upfront costs.
Jump to insightSolar scammers may falsely claim to be affiliated with a Boulder County or Colorado government agency.
Jump to insightA typical solar panel installation costs anywhere from $10,605 to $30,300 in Colorado. Prices in Boulder are comparable, ranging from $10,430 to $29,800.
This doesn’t include an energy storage battery, which sometimes costs as much as the panels: $7,000 to $18,000. A battery lets you store excess energy generated during the day and use it when your panels aren’t producing, like at night or during outages. It’s worth considering if your area gets frequent blackouts or if you don’t opt into Boulder’s net metering program.
System size is the other major solar cost factor. The average Boulder household needs a system with a capacity of 9.27 kW (kilowatt) to fully offset their electricity costs. Depending on how much energy you and your family use, you might need a smaller or larger one.
Average total solar installation costs by system size in Boulder
5 kW | 6 kW | 7 kW | 8 kW | 9 kW | 10 kW | |
---|---|---|---|---|---|---|
Before federal tax credit | $14,900 | $17,880 | $20,860 | $23,840 | $26,820 | $29,800 |
After federal tax credit | $10,430 | $12,516 | $14,602 | $16,688 | $18,774 | $20,860 |
Getting solar panels is like buying a car. Most people pay cash, finance or lease. Similar to leasing, a power purchase agreement (PPA) lets you get the benefits of solar without actually owning the equipment.
Local residential solar loans, sponsored by the Collective Clean Energy Fund in partnership with Colorado-based credit unions, are available through the Colorado Residential Energy Upgrade Loan (RENU) program. Green Colorado Credit Reserve loans are available for small businesses to fund commercial solar projects.
» SOLAR PANELS: Lease vs. buy
Solar panels are generally worth it in Colorado if you like the idea of lowering your monthly utility bills. On average, Boulder homeowners with solar panels can avoid $53,986 in total utility costs over 25 years.
It also might be easier than you think. “The only glitch we had was with Xcel Energy trying to get their people out here to replace the net meter,” Paul in Colorado told us. “Outside of that, everything went smoothly. Everything's working fine.”
The main drawback is the high upfront cost of purchasing and installing the panels and equipment. Assuming an upfront purchase, it takes about 8.9 years to break even (when your savings with solar panels make up for the cost).
Considering Colorado averages 5 to 6.5 peak sun hours each day, switching to solar is worth considering. We suggest using NREL’s PVWatts Calculator to estimate how much electricity a solar panel can produce over a year on your house. Project Sunroof is a reliable online solar savings estimator.
Potential roof problems
As a rule of thumb, if your roof is more than 10 years old, consider fixing it before going solar. Installing solar panels on an old roof might mean you have to remove the panels, replace your roof and then reinstall the panels again. This is an expensive and frustrating process.
» SHOULD YOU: Replace your roof before going solar?
In our experience, the best solar companies in Colorado have a few things in common: lots of experience, reliable equipment and transparent contracts. Here are some hiring tips.
Going solar in Boulder County
The area gets a good amount of snowfall, but its sunny winter days typically help melt snow from solar panels. However, you may need to consider panel tilt and cleaning strategies to ensure optimal winter performance.
» BEST STATES FOR SOLAR: Colorado ranked 24th in 2024
The 30% federal solar investment tax credit (ITC) is the best incentive for most homeowners. It reduces your federal tax liability by 30% of how much it costs to install solar panels. You can combine the ITC with local solar incentives in Colorado to maximize savings.
For instance, you might be eligible for rebates through Boulder County's EnergySmart program. Xcel Energy has the Solar*Rewards program, which is a performance-based incentive for homeowners and business owners. There is also no sales tax on solar panels and other renewable energy equipment.
The ITC is a credit, meaning it directly decreases the amount of taxes you owe. This is different from a deduction, which lowers your taxable income.
For example, if you spend $10,000 installing a solar panel system, the ITC is worth $3,000. If you owe $5,000 in taxes, the $3,000 credit reduces what you owe to $2,000. Any unused portion rolls over to the next tax year. However, it’s possible to get a refund check if the ITC credit reduces your taxes to the point where you overpaid during the year.
Yes, you or your installer will have to apply for a permit through Boulder County.
Your homeowners association cannot outright ban solar panels. However, it can place certain restrictions on how they look, according to Colorado House Bill 21-1229.
» GREENEST STATES: Colorado ranked 36th in 2024
Net metering lets you send excess power that your solar panels generate into your local power grid. In return, you can earn credits on future utility bills. These credits can then offset your bill when your solar panels don't produce as much energy, like on cloudy days or during Boulder’s long, dark winters.
Utility companies in Colorado usually credit customers for the excess electricity their solar panels generate at the same rate they are charged for electricity consumption (often called the retail rate). If you use Xcel Energy, any excess energy at the end of the billing period will carry over to the next month.
Monocrystalline and polycrystalline are the most common types of solar panels used in residential installations. In general, monocrystalline panels are considered the best bang for your buck. Cheaper solar panels are typically polycrystalline. The key difference is in materials and efficiency: Monocrystalline panels use pure, single silicon crystals, while polycrystalline panels are made from melted silicon fragments, resulting in different efficiency levels.
Solar panel efficiency is a measure of how well a panel makes electricity. Standard efficiency rates range from 19% to 23%, which means 19% to 23% of the sunlight that hits the panels gets converted into electricity. The more efficient the solar panels you buy are, the fewer panels you need. While more efficient panels cost a little more, you save by buying fewer panels.
We’re not aware of a totally free solar option in Boulder. Companies may claim you can get solar panels for “free” or with little to no upfront cost. In reality, solar panels rarely come entirely free. These offers often involve hidden fees or long-term leases with escalating payments.
The ConsumerAffairs Research Team used a research-backed, data-driven approach, which was informed by our expert editors, to choose the best solar companies. We prefer to recommend those with a longer time in business and a solid track record of reliability in Boulder, Colorado. For this guide, we objectively weighted several key features to get our final rankings:
Reviews, ratings and testimonials: 40%
We analyzed solar company reviews by verified solar customers to gauge real-world satisfaction. Companies with generally positive feedback on our site scored highest in this aspect. Those with the most 4- and 5-star reviews by verified Boulder customers were given preference.
Warranties: 20%
A long warranty is important — it shows that a company stands behind its products and services. We compared companies on both equipment and craftsmanship warranty terms. All of our top picks for professional installation have warranties or production guarantees of at least 10 to 25 years.
Equipment selection: 20%
We evaluated each company’s selection of solar panels, storage batteries and inverters. Those with proprietary technology or a wide equipment selection from trusted brands ranked highest.
Financing and payment options: 20%
We gave preference to companies that offer multiple payment and financing options for transparent terms and conditions.
ConsumerAffairs Research Team regularly evaluates customer reviews, company information and industry trends to update our top picks:
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ConsumerAffairs writers primarily rely on government data, industry experts and original research from reputable publications to inform their work. Specific sources for this article include:
Company | Customer rating | About | Learn More |
---|---|---|---|
![]() | 4.8
184 reviews
| Solar energy solutions. Offers solar energy kits, DIY solar kits and lithium batteries. Small- and large-scale equipment. Online purchasing with shipping to 48 states. Partner installer network. Financing and warranty available. | Read reviews |
![]() | 4.4
296 reviews
| End-to-end solar services in Texas, Colorado and Florida. Residential and commercial properties. Includes 25-year warranty. SunPower Master Dealer. Certified Tesla Powerwall installation. 24/7 performance monitoring. | Get Started |
![]() | 4.2
3,179 reviews
| Sunrun offers free energy consultations in 20 states. 15 years of experience. Sells and leases customized residential solar energy systems. Solar advisors offer one-on-one consultants to guide you through the details. | Get Started |
![]() | 5.0
View profile
| Installs residential solar energy systems in San Juan, Puerto Rico and parts of California, Colorado, Connecticut, Massachusetts, Florida, New Jersey, New York and Texas. Financing options include loans, leases and PPAs. | Read reviews |
![]() | No reviews | Residential and commercial solar energy system installation, EV charging, roofing, battery backup and storage for parts of California, Colorado and North Carolina. 25-year parts and labor warranties. Free quotes available. | |
![]() | No reviews | Specializes in residential and commercial solar energy system installations, PV modules, inverters, backup batteries and generators. Serves parts of northern Colorado and southern Wyoming. Offers products from REC Group. | |
![]() | No reviews | Residential and commercial solar energy system installations as well as energy storage and EV charging. Provides services across the state of Colorado. Offers a satisfaction guarantee. Finance through a solar loan or lease. | |
![]() | No reviews | Residential solar installation, roofing and energy storage across California, Nevada and Utah. Offers 1-year money back production guarantee on solar production. Buying options include cash and zero down financing. | |
![]() | No reviews | Specializes in residential solar panel design, installation and maintenance plus solar water heating systems. Serves San Diego, California, and parts of Nevada. 12-year parts and labor warranties. Offers free estimates. | |
![]() | No reviews | Residential and commercial installers servicing parts of Colorado and Wyoming. Battery storage, EV charging and agrovoltaics services also offered. 10-year workmanship warranty on solar systems. Financing options available. |