5 Best Solar Installation Companies in Illinois (2023)

By Jessica Wimmer

Nov 06, 2023
Solar panels on a tiled terracotta roof of a home.

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Star Rating Location Presence BBB Rating Link
SunPower SunPower
50 States A+ Get Free Quote
ADT Solar ADT Solar
23 States A+ Get Free Quote
Sunrun Sunrun
21 States A+ Get Free Quote
Blue Raven Solar Blue Raven Solar
18 States A+ Get Free Quote
Palmetto Solar Palmetto Solar
20 States A+ Get Free Quote
Momentum Solar Momentum Solar
11 States A+ Get Free Quote
Tesla Solar Tesla Solar
50 States A+ Get Free Quote
Logo SunPower
Star Rating
Location Presence 50 States
BBB Rating A+
Get Free Quote
ADT Solar
Logo ADT Solar
Star Rating
Location Presence 23 States
BBB Rating A+
Get Free Quote
Logo Sunrun
Star Rating
Location Presence 21 States
BBB Rating A+
Get Free Quote
Blue Raven Solar
Logo Blue Raven Solar
Star Rating
Location Presence 18 States
BBB Rating A+
Get Free Quote
Palmetto Solar
Logo Palmetto Solar
Star Rating
Location Presence 20 States
BBB Rating A+
Get Free Quote
Momentum Solar
Logo Momentum Solar
Star Rating
Location Presence 11 States
BBB Rating A+
Get Free Quote
Tesla Solar
Logo Tesla Solar
Star Rating
Location Presence 50 States
BBB Rating A+
Get Free Quote
Star Rating
Best For
Location Presence
BBB Rating
Most Experienced
50 States
Best Comprehensive Coverage
23 States
Best for Home Builders
21 States
Best In-House Financing
18 States
Most Protection
20 States
Best for Guided Services
11 States
Most Aesthetic
50 States

Illinois is one of the fastest-growing solar markets in the country, ranking 15th in overall solar investment at the end of 2022, according to the Solar Energy Industries Association. The Prairie State has more than 340 solar-related companies and is on a mission to generate 25% of its energy from renewable sources by 2025. Illinois is expected to grow its solar capacity by more than 1,700% over the next five years. 

If you’re one of the many Illinois homeowners wanting to make the switch to clean energy and reduce your electricity bills, we’ve done the research for you on which solar companies are available in your state. We looked at more than 20 providers’ websites, read their customer reviews, analyzed their warranties and financing options, compared their pricing by getting online quotes, and conducted mystery shopping to understand what each company has to offer. See which of the best solar companies made our final selection below.



Top Solar Installation Companies

These solar providers rank highest on our list:



Most Experienced: SunPower

SunPower is considered a pioneer in the solar industry with more than 35 years of experience. The company has been in business since 1985 and has received more than 1,000 patents for solar innovation. Plus, its solar panels are some of the most efficient you can find due to their use of SunPower’s Maxeon cell technology.

SunPower Most Experienced

Fast Facts:

  • Warranty options: 25-year system and labor warranty
  • Panel options: Monocrystalline (Maxeon)
  • Financing: Cash purchase, solar loan, solar lease, power purchase agreement (PPA)

Read more: SunPower Review

Benefits and Drawbacks
Pros Builds customized, high-efficiency solar panels Provides solar batteries and electric vehicle chargers Has 25-year system and labor warranty Cons Only uses in-house products, limiting customization More expensive than some other solar providers Some customer complaints cite faulty panels and monitoring systems
What We Like

SunPower offers some of the most energy-efficient and high-performing solar systems available. It’s one of the few companies that uses in-house system components, creating a streamlined system with each part designed to work optimally together.

What Homeowner Reviews Say

We read customer reviews on Trustpilot to see what SunPower homeowners have to say about their experiences. Overall, the company has 2.8 out of 5 stars from over 300 reviews. Here’s a sample:

“Thank you for your prompt service! Your technician was very knowledgeable! We are happy with our service.” —Talia via Trustpilot on May 22, 2023

“Project management has been abysmal. Long delays between various planning and scheduling steps, with no explanation—and usually the project manager was not aware of the problems until we told him/her (there were two different project managers during this time). They were not following up to see if plans were filed with local building offices, or following up to see when permits were ready or inspections scheduled or not.” —Dan via Trustpilot on April 25, 2023

“My solar has been so fun to watch. Peter, the installer that turned on my solar, was able to give me a great orientation to how the solar unit works. He broke things down in a way I could understand. He also gave me some new solar-powered home advice and challenged me to try playing around with my solar storage to see how effective the solar is. I definitely love my system.” —Marian via Trustpilot on January 24, 2023

Best In-House Financing: Blue Raven Solar

With Blue Raven Solar, you can purchase your solar panel system outright at installation or get a solar loan and make payments. Unlike most solar providers that partner with a lending institution, Blue Raven provides in-house financing if you opt for a loan. The company also provides 18 months of free solar through its BluePower Plus program.

Blue Raven Solar Best In-House Financing

Fast Facts:

  • Warranty options: Five-year manufacturer warranty
  • Panel options: Monocrystalline (various manufacturers)
  • Financing: Cash purchase, solar loan

Read More: Blue Raven Review

Benefits and Drawbacks
Pros Provides a rare financing option that includes 18 months of free solar energy Sells SunPowers’s high-efficiency solar products Has won multiple awards for its in-house team’s performance Cons Offers one of the shortest guarantees among our reviewed companies Doesn’t have solar lease or power purchase agreement financing options Some customer reviews mention aggressive sales tactics
What We Like

Blue Raven is known industry-wide for its reliability and trustworthiness. The company also stands out for its in-house financing option, which includes 18 months of free solar energy. We noted customers praising the knowledgeable staff and prompt installation in online reviews.

What Homeowner Reviews Say

Blue Raven Solar has 4.5 out of 5 stars from approximately 400 customer reviews on Google. Most customers report a great experience with the company. Those who rate the provider poorly cite improper installation that led to costly repairs.

“Professional, great project manager, and awesome crew. Installation looks amazing, and their engineering drawings were done in a clear, professional, and understandable manner.” —Juan via Google Reviews in May 2022

“Worst company and service ever. Their service and panel are causing leakage in my ceiling. They took $32,000 to install panels and later asked us to pay more for guards to fix the leakage.” —Beda via Google Reviews in October 2022

“Technicians were courteous and helpful. They cleaned up after themselves and were respectful of my property. Great group of guys that went through every step, were on time, and completed within scheduled time. Highly recommend this company if you are looking at solar panel installation.” —John via Google Reviews in December 2022

Best Comprehensive Coverage: ADT Solar

Your solar products and installation work are covered with ADT Solar. The company offers a 25-year labor warranty, 25-year energy production guarantee, 25-year panel manufacturer warranty, and 25-year Enphase microinverter warranty. Another great perk to the company is that if another solar company offers comparable products and benefits at a lower price than ADT, it will refund you the difference.

ADT Solar Best Comprehensive Coverage

Fast Facts:

  • Warranty options: 25-year power production guarantee
  • Panel options: Monocrystalline (LG)
  • Financing: Cash purchase, solar loan

Read more: ADT Solar Review

Benefits and Drawbacks
Pros Provides thorough protection plus financial compensation for poor-performing panels Offers system monitoring through Enphase MyEnlighten app Offers additional roof repair services Cons Some customers cite difficulty reaching customer support Doesn’t install electric vehicle chargers or perform energy efficiency audits Doesn’t offer leases or PPAs
What We Like

ADT Solar offers comprehensive warranties and system monitoring to support customers after their solar system installation. Its transparent purchasing options and A+ rating from the BBB make it a trusted provider.

What Homeowner Reviews Say

ADT Solar has a limited number of Google and Trustpilot reviews, so we analyzed reviews on Best Company. Most customers report a smooth installation and great crew. Others complain about installation delays and difficulty getting in touch with support.

“Great service and easy to use app. From case manager to installation you can expect excellent customer service.” —Isaac via Best Company in January 2023

“My real complaint is service issues reported to service technician timelines. Customer service explains that they are short on service personnel and lag time is about four weeks for a call back let alone how much time from there to on site and repair. This is the second time I needed on-site service, and they delayed.” —Forest via Best Company in December 2022

“Salesman was very knowledgeable with the products. He was prompt in returning messages. Once all panels were fully operational, product works great.” —Christine via Best Company in November 2022

Palmetto Solar: Most Protection

Not only does Palmetto Solar provide a 25-year manufacturer warranty for some panels, but it also helps protect your investment through its Peace of Mind plan. For $12 per month, Palmetto will monitor your system remotely to make sure it’s performing optimally and saving you the most money possible. You’ll also get a discount on services such as panel cleaning and battery maintenance.

Palmetto Solar Most Protection

Fast Facts:

  • Warranty options: 25-year manufacturer warranty
  • Panel options: Monocrystalline (Q Cells)
  • Financing: Solar loan, solar lease, power purchase agreement (PPA)

Read more: Palmetto Review

Benefits and Drawbacks
Pros Offers a tiered system protection plan Provides an online savings calculator to estimate your return on investment Includes a 25-year panel output warranty Cons Requires an additional monthly fee for active system monitoring Doesn’t offer a free energy consultation Doesn’t offer leasing or PPA financing
What We Like

Palmetto has a wide range of solar services, from comprehensive protection plans to pest abatement. Besides offering some of the market’s most efficient residential solar panels, Palmetto has a 25-year warranty and ongoing customer support via its app.

What Homeowner Reviews Say

Best Company’s customer reviews mention Palmetto’s professionalism and customer support throughout the solar process. Negative reviews cite slow panel activation timelines, though this could be due to local ordinances.

“The whole experience, from the salesperson to the installation team, was outstanding. Usually, in my experience, once the sale is done, there’s not much communication. With Palmetto, that was not the case. The communication continued throughout making sure all my needs and questions were addressed. Everyone we encountered was professional, friendly, honest, and went out of their way to keep us informed and provide us with very helpful information that one does not normally get.” —Guy via Best Company in February 2022

“Received panels over a month ago still not in service.” —Rhonda via Best Company in February 2022

“Palmetto installed my solar system in June 2021, and it has produced more energy than what I use daily. They have excellent customer support, and their app is very good.” —Josie via Best Company in December 2021

Best Aesthetic: Tesla

The Tesla brand is known for its sleek, modern look. For homeowners who want to use clean energy but don’t want large, raised panels on their roofs, the Tesla Solar Roof is made to look like regular shingles. That way, you can get the benefits of solar power without lowering your house’s curb appeal. Tesla’s Powerwall is also one of the most popular solar batteries available.

Tesla Solar Most Aesthetic

Fast Facts:

  • Warranty options: 25-year performance guarantee
  • Panel options: Monocrystalline (Hanwha)
  • Financing: Cash purchase, solar loan

Read More: Tesla Solar Review

Benefits and Drawbacks


➕ Provides transparent online quotes with pricing details
➕ Offers up to 10 Tesla Powerwalls per installation
➕ Sells solar roofing options that replace your entire roof


➖ Lacks customization options, limiting system size to four choices
➖ Provides only third-party installation
➖ Some customers cite long wait times for repairs

What We Like

Tesla offers a range of sleekly designed solar panels that blend into your existing roof. Its transparent pricing and detailed website make it a valuable choice for customers looking to learn more about solar panels without needing to speak to a sales representative.

What Homeowner Reviews Say

Customer reviews on Best Company report that the Tesla system looks and performs as well or even better than expected. Customer complaints highlight slow turnaround times and trouble reaching customer support.

“I finally went with the Tesla Solar Roof (tiles not panels), and I couldn’t be happier. I needed a new roof anyway so decided to get it with two PowerWall backup batteries. The product looks amazing and [in my opinion] is the best looking solar product on the market right now.” —Robin via Best Company in May 2022

“The price that Tesla offered was great, and the installation went smoothly, but everything else has been a nightmare. No communications from my project advisor during the initial design phase; I had to call Tesla numerous times to ask questions. Once installed, it took Tesla four times over seven months to file the application to the utility company correctly.” —Timothy via Best Company in December 2022

“We leased our solar power system from Solar City before the buyout from Tesla Solar. Transparent transfer from one company to the other. Excellent transaction throughout with great communication from install through activation. We had to deal with our local power company for the connection and turn-on but that was very smooth with assistance from Tesla.” —Ronald via Best Company in May 2021



Solar Installation Cost Factors in Illinois

There are a few ways Illinois residents can save money on going solar. Here are the Illinois solar incentives and rebates to look into:



Getting Solar Quotes in Illinois

Whether you go online or pick up the phone, getting a solar quote should only take around 10 minutes. If you’re early into your solar research, it may be best to call and speak with a representative so you can ask questions in addition to getting a solar estimate for your property. If you’d rather get a quote online, here’s how:

  1. Click the “Get a Quote” button that’s usually in the top-right corner of the provider’s homepage or at the bottom of the website. 
  2. You’ll be asked to fill out some routine information. Providers need to know your property size, roof pitch, and the type of solar equipment you’re interested in to give you a quote. They’ll also ask for some basic contact information. 
  3. Once you submit your information, you’ll either get a free quote instantly on the site or via email within a few minutes.


What to Ask Solar Providers

We recommend asking solar panel companies these questions before deciding on a provider:

In addition to questions about the installer, we suggest asking these questions about equipment:



Solar Services

Most solar energy companies offer similar services to help guide homeowners through the process and make the most of their systems. Common solar services include the following:



Our Recommendation

All providers on our list are reputable solar companies with high-quality products and services. If superior energy efficiency is your top priority, we recommend SunPower and Blue Raven. Both providers sell SunPower’s high-efficiency panels, so you should see big energy savings with either. 

If cost is the next thing to research on your list, see our solar panel cost guide for a more detailed breakdown of what your solar investment could look like.



What Solar Installation Looks Like

Most solar installations follow this or a similar process after your system’s design is approved:

  1. Site evaluation: An installer will visit your home to confirm the planned design and estimate the scope of work. This person or their team will also inspect your roof, attic, and electrical setup. 
  2. Permit approval: Most states require a permit to install solar panels. Your solar provider should handle the paperwork with your local municipality. 
  3. Installation: Installation typically takes one to three days. You don’t need to be home for it, but we recommend it so you can ask questions along the way.
  4. Cleanup: Installers should remove any debris and leave your property in good condition.
  5. City inspection: Your provider should coordinate with your city to have an inspector come out to check that your system is up to code. 
  6. Utility connection: Lastly, your system must be connected to your local utility system if you’re connecting it to the grid. You’ll apply for connection through your utility company (some providers do this for you), which will also want to inspect your system to make sure it’s in accordance with its utility guidelines. After getting permission to operate, your system can be turned on. 
Homeowners Save $20,000 to $97,000 with Solar Panels on Average Over Typical System Life Span
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Solar Companies FAQ

Is solar a good investment in Illinois?

Illinois sees plenty of sun, so solar energy production won’t be a problem for residents. Illinois homeowners also use around 730 kilowatt-hours (kWh) per month, so if you’re one of those residents that uses more than 500 kWh monthly, you’ll definitely see a return on investment.

What is the best solar company brand?

Illinois has several reputable solar companies. We recommend looking into SunPower, Blue Raven Solar, and ADT Solar for top solar panel performance and customer service.

What is the average cost of solar in Illinois?

The average cost of solar in Illinois is around $23,000, which is less than the national average.

What is the Illinois Shines program?

Also known as the Adjustable Block Program, Illinois Shines lets you earn one solar renewable energy certificate (SREC) for each megawatt-hour (MWh) of electricity your system generates for 15 years. This comes out to more than $10,000 in additional savings on average.



How We Chose the Top Solar Companies

We researched and analyzed dozens of solar panels and solar installation companies. We then formulated a rating system based on each solar installer or manufacturer’s services and products. We weighed several significant factors, including the quality and type of solar panels offered, the customer support network, warranty lengths and limitations, and additional benefits such as mobile apps for monitoring and customer service. 

Speaking directly to representatives, we determined how each solar company personalizes its solar panel installation for each home. We also analyzed each company’s warranty options to ensure their product and performance guarantees match or exceed industry standards. 

We evaluated each provider based on their rating and history with the Better Business Bureau (BBB) to determine reputation. In addition, we analyzed the 100 most recent Google Reviews for each provider across various locations and branches. 

Read more: Our Methodology