15 Best Solar Companies in Oak Brook, IL (2023 Reviews)

We analyzed over 1500 solar companies in the nation,
and have selected the top 15 in Oak Brook based on:

  • Customer review scores
  • Service area for Oak Brook, IL
  • Company policies and services offered
  • Accreditations and certifications

Average Oak Brook homeowner saves $1,107/year with solar panels

By EcoWatch Local Advisors

Data Analysis: James Savino

Ranking Methodology: Karsten Neumeister

Updated September 15, 2023

Why you can trust EcoWatch

We work with a panel of solar experts to create unbiased reviews that empower you to make the right choice for your home. No other site has covered renewables as long as us, which means we have more data and insider information than other sites. Our rankings are never affected by revenue or partnerships.

Best Solar Companies in Oak Brook

As a homeowner in Oak Brook, you may be interested in switching to solar power and wondering about the best solar companies in your local area. Solar could be a fantastic idea since it comes with many benefits. On average, your family can save $13,000 over 20 years with solar panels. And because solar panels have a lifespan of about 25 to 30 years, you can save will be much higher than that overall.

To help you sort through the large number of Oak Brook solar installers, we've narrowed in on a list of the top ones. To get an idea of how much you might pay to put up a solar panel system on your roof, you can get a free quote from one of the top solar companies in Oak Brook by clicking the "get quote" button below.

Best National Provider

SunPower

★★★★★
5.0

  • Most efficient panels on the market
  • National coverage
  • Cradle to Cradle sustainability certification
  • Great warranty coverage
  • Expensive
  • Customer service varies by local dealer

Best Solar Financing

Blue Raven Solar

★★★★★
4.5

  • Industry-leading in-house financing
  • Competitive pricing
  • Excellent reputation
  • Doesn't offer solar batteries

Best Warranty Coverage

ADT Solar

★★★★★
4.0

  • Industry-leading warranty coverage
  • Expansive service area
  • Some reported communication issues
  • No leases or PPAs

EcoWatch Rankings for Solar Companies in Oak Brook

Best Local Installer
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EcoWatch Rating

4.6/5

SunPower by Sun N Us

  • Pros icon Informative Resources
  • Pros icon Clear Pricing Policy
  • Pros icon Free Quotes
  • Pros icon Reliable Customer Support
  • Con icon Limited information available on website

Services Offered

  • Service icon Integrated roofing
  • Service icon Home installations
  • Service icon Energy storage solutions
  • Service icon Tailored solutions
  • Service icon Expert panel installation

Website: https://www.sunpowerbysunnus.com/
Address: 1400 E Touhy Ave Unit 255, Des Plaines, IL 60018
Phone: 8337866878
Outstanding Local Installer
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EcoWatch Rating

3.0/5

YellowLite

  • Pros icon Informative Resources
  • Pros icon Clear Pricing Policy
  • Pros icon Reliable Customer Support
  • Pros icon Free Quotes
  • Con icon Limited information available on website

Services Offered

  • Service icon Home installations
  • Service icon Expert panel installation
  • Service icon Tailored solutions
  • Service icon Integrated roofing

Website: https://yellowlitechicago.business.site/
Address: 9981 W 190th Pl Unit K-1, Mokena, IL 60448
Phone: 8004908726
Outstanding Local Installer
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EcoWatch Rating

5.0/5

Greencore Solar, Inc.

  • Pros icon Informative Resources
  • Pros icon Free Quotes
  • Pros icon Clear Pricing Policy
  • Pros icon Reliable Customer Support
  • Con icon Limited information available on website

Services Offered

  • Service icon Business installations
  • Service icon Tailored solutions
  • Service icon Expert panel installation
  • Service icon Home installations

Website: https://www.greencoresolar.com/
Address: 955 Lively Blvd, Wood Dale, IL 60191
Phone: 3127615505
Outstanding Local Installer
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EcoWatch Rating

5.0/5

Illinois Solar Express, LLC

  • Pros icon Informative Resources
  • Pros icon Prompt Service Delivery
  • Pros icon Reliable Customer Support
  • Con icon Limited information available on website

Services Offered

  • Service icon Expert panel installation
  • Service icon Integrated roofing
  • Service icon Home installations
  • Service icon Tailored solutions

Website: https://illinoissolarexpress.com/
Address: 1 Mid America Plaza 3rd Floor, Oakbrook Terrace, IL 60181
Phone: 7738767676
Outstanding Local Installer
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EcoWatch Rating

5.0/5

Dominion Lighting & Solar

  • Pros icon Clear Pricing Policy
  • Pros icon Free Quotes
  • Pros icon Reliable Customer Support
  • Pros icon Informative Resources
  • Con icon Limited information available on website

Services Offered

  • Service icon Home installations
  • Service icon Expert panel installation
  • Service icon Tailored solutions

Website: http://www.dominion.solar/
Address: 650 W Grand Ave Suite 207, Elmhurst, IL 60126
Phone: 6304814122
Outstanding Local Installer
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EcoWatch Rating

4.9/5

Windy City Solar Group

  • Pros icon Clear Pricing Policy
  • Pros icon Free Quotes
  • Pros icon Reliable Customer Support
  • Con icon Limited information available on website

Services Offered

  • Service icon Business installations
  • Service icon Home installations
  • Service icon Tailored solutions
  • Service icon Expert panel installation
  • Service icon Integrated roofing

Website: https://www.windycitysolargroup.com/
Address: 1546 Cuyler Ave, Berwyn, IL 60402
Phone: 7087378114
Outstanding Local Installer
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EcoWatch Rating

4.9/5

JD Pro Electric Inc

  • Pros icon Free Quotes
  • Pros icon Clear Pricing Policy
  • Pros icon Informative Resources
  • Con icon Limited information available on website

Services Offered

  • Service icon Business installations
  • Service icon Skilled repairs
  • Service icon Tailored solutions
  • Service icon Expert panel installation
  • Service icon Home installations

Website: http://www.jdproelectric.com/
Address: 9230 Grand Ave, Franklin Park, IL 60131
Phone: 8479162052
Outstanding Local Installer
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EcoWatch Rating

4.8/5

Reficiency Solar

  • Pros icon Clear Pricing Policy
  • Pros icon Free Quotes
  • Pros icon Reliable Customer Support
  • Pros icon Informative Resources
  • Con icon Limited information available on website

Services Offered

  • Service icon Home installations
  • Service icon Energy storage solutions
  • Service icon Tailored solutions
  • Service icon Expert panel installation
  • Service icon Skilled repairs
  • Service icon Business installations
  • Service icon Integrated roofing

Website: https://reficiency.com/
Address: 4513 Lincoln Ave # 110, Lisle, IL 60532
Phone: 6307800951
Outstanding Local Installer
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EcoWatch Rating

4.9/5

Service Solar Solutions

  • Pros icon Reliable Customer Support
  • Pros icon Clear Pricing Policy
  • Pros icon Free Quotes
  • Con icon Limited information available on website

Services Offered

  • Service icon Skilled repairs
  • Service icon Home installations
  • Service icon Integrated roofing
  • Service icon Expert panel installation
  • Service icon Tailored solutions
  • Service icon Business installations

Website: http://www.solar-napervilleil.com/
Address: 1001 E Chicago Ave, Naperville, IL 60540
Phone: 6304267224
Outstanding Local Installer
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EcoWatch Rating

4.6/5

Kapital Electric, Inc.

  • Pros icon Prompt Service Delivery
  • Pros icon Informative Resources
  • Pros icon Clear Pricing Policy
  • Pros icon Free Quotes
  • Con icon Limited information available on website

Services Offered

  • Service icon Tailored solutions
  • Service icon Business installations
  • Service icon Energy storage solutions
  • Service icon Integrated roofing
  • Service icon Expert panel installation
  • Service icon Home installations

Website: https://www.kapitalelectric.com/
Address: 1270 Mark St, Bensenville, IL 60106
Phone: 6308332389
Outstanding Local Installer
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EcoWatch Rating

4.1/5

Rethink Electric

  • Pros icon Reliable Customer Support
  • Pros icon Free Quotes
  • Pros icon Clear Pricing Policy
  • Pros icon Informative Resources
  • Con icon Limited information available on website

Services Offered

  • Service icon Tailored solutions
  • Service icon Skilled repairs
  • Service icon Energy storage solutions
  • Service icon Expert panel installation
  • Service icon End-to-end services
  • Service icon Business installations
  • Service icon Integrated roofing
  • Service icon Home installations

Website: https://rethinkelectric.com/
Address: 850 N Central Ave, Wood Dale, IL 60191
Phone: 6307474587
Outstanding Local Installer
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EcoWatch Rating

4.0/5

Unity Solar Group

  • Pros icon Informative Resources
  • Pros icon Free Quotes
  • Pros icon Reliable Customer Support
  • Pros icon Clear Pricing Policy
  • Con icon Limited information available on website

Services Offered

  • Service icon Home installations
  • Service icon Energy storage solutions
  • Service icon Tailored solutions
  • Service icon Expert panel installation
  • Service icon Business installations
  • Service icon Integrated roofing

Website: http://unitysolargroup.com/
Address: 1111 22nd St ste 240b, Oak Brook, IL 60523
Phone: 8337437676
Outstanding Local Installer
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EcoWatch Rating

4.6/5

Solar Spring & Wire Form Co

  • Pros icon Free Quotes
  • Pros icon Prompt Service Delivery
  • Pros icon Informative Resources
  • Pros icon Reliable Customer Support
  • Pros icon Clear Pricing Policy
  • Con icon Limited information available on website

Services Offered

  • Service icon Expert panel installation
  • Service icon Energy storage solutions
  • Service icon Tailored solutions
  • Service icon Home installations

Website: https://www.solarspring.com/
Address: 345 Criss Cir, Elk Grove Village, IL 60007
Phone: 8474377838
Outstanding Local Installer
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EcoWatch Rating

4.6/5

Windfree Solar Co

  • Pros icon Informative Resources
  • Pros icon Reliable Customer Support
  • Pros icon Free Quotes
  • Pros icon Clear Pricing Policy
  • Con icon Limited information available on website

Services Offered

  • Service icon End-to-end services
  • Service icon Energy storage solutions
  • Service icon Business installations
  • Service icon Home installations
  • Service icon Expert panel installation
  • Service icon Tailored solutions
  • Service icon Integrated roofing

Website: https://www.windfree.us/
Address: 5022 W Foster Ave, Chicago, IL 60630
Phone: 3127788859
Outstanding Local Installer
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EcoWatch Rating

4.6/5

Ailey Solar Electric, Inc.

  • Pros icon Reliable Customer Support
  • Pros icon Informative Resources
  • Pros icon Free Quotes
  • Pros icon Clear Pricing Policy
  • Con icon Limited information available on website

Services Offered

  • Service icon Tailored solutions
  • Service icon Home installations
  • Service icon Expert panel installation

Website: http://aileysolarelectric.com/
Address: 1965 W Pershing Rd, Chicago, IL 60609
Phone: 7734921294

Methodology: How We Ranked the Best Solar Companies in Oak Brook

EcoWatch's solar experts analyzed each solar company in Oak Brook based on criteria such as its reputation in the industry, customer reviews, services, warranty coverage and financing. Using this solar methodology, we used the data we collected to rate and rank each company and narrow down our picks for the best solar companies in Oak Brook


Below are some the criteria we examined specifically for Illinois solar companies

  • Brand reputation and certifications (20%): We take each company's Better Business Bureau (BBB) score into consideration, as well as how long the installer has been in business (at least 5 years is required, 10 preferred) and what type of solar certifications it holds.
  • Customer reviews (20%): Trust is a top priority at EcoWatch, so we take customer experience under close consideration. We scour different review sites and customer testimonials when ranking our top solar companies, checking sites such as Trustpilot and Google Reviews. We also consider any potential complaints or lawsuits filed against these companies and award or remove points accordingly.
  • Warranty (20%): A company earns a perfect score in this category if it offers 25-year warranties that cover performance, product and workmanship. The industry standard that we measure companies against is 25-year product and performance warranties, along with a 10-year workmanship warranty. We also look closely into the track record of the post-installation support each company provides in terms of honoring its contracts
  • Solar services (10%): All of the companies we review install solar panels, but we award companies higher points if they offer additional services for customers, like battery installation, energy-efficiency audits, and EV chargers.
  • Pricing and financing (10%): It's hard to get exact quotes for solar projects, but we use marketplace research to determine how each company prices its equipment and installation services. Additionally, companies that offer more help for panel financing — like in-house loans, leases, or PPAs — score higher than those that don't.
  • Availability (10%): The bigger the service area, the higher the company will score.
  • Transparency and accessibility (5%): Solar installers that offer free consultations and easy contact methods score higher in this category.
  • Environmental, social and corporate governance factors (5%): A company earns a perfect score in this category if it offers public data disclosure, addresses end-of-life (EOL) products or processes, and demonstrates a commitment to uplifting the communities that it serves.

The Cost and Benefits of Solar in Oak Brook

For many people considering switching to solar, the decision of which solar installer to go with comes down to pricing. The installation cost is just one important factor you should consider when looking into getting solar panels. How much it'll cost and how much you can save depend on things including:

  • Incentives: The federal solar investment tax credit, which everyone qualifies for, allows you to deduct 30% of the cost of your solar system installation from your federal taxes. Plus, not including incentives, you can save about $13,000 over 20 years on your energy bills.
  • How much sunlight your roof gets: This, and the configuration of your roof, affects affect how much energy your solar panels can produce.
  • Electricity consumption: The average household in Oak Brook uses a decent amount of, and therefore may save on their energy bills.
  • The model of solar panels you have the money for: This depends on how much you're willing to spend upfront.

Though a solar panel system costs a good chunk of money upfront, it can save you thousands of dollars in the long term. The question of how much, though, depends on several factors, such as the amount of daily direct sunlight available and your current power bills.

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Solar Incentives in Oak Brook

Switching to solar power has plenty of great benefits. Not only can it help preserve the Earth, but you can also save some money on your installation with various government incentives. There are quite a few federal, state and local rebates and tax credits that earn a decent amount of money back after installing a solar panel system. You can find out about the incentives you can use in our article on solar incentives

Environmental Impact of Switching to Solar in Oak Brook

There are a few key reasons why homeowners want to invest in solar energy: to help their wallet and the environment. Many homeowners might be wondering how much exactly they can impact the environment by switching to solar in Oak Brook, though. The average person has a considerable carbon footprint. Between their car, which produces over 10,000 pounds of carbon dioxide emissions every year, and electricity for their home, it can be overwhelming to figure out what to do. Using solar power is a simple thing you can do to help. Though solar panel manufacturing releases carbon dioxide emissions, the panels make up for it by considerably lowering the amount of CO2 you would have produced if you still used nonrenewable energy. In Oak Brook, you can reduce your carbon footprint by 90 pounds a year with solar panels. The perks of solar power are abundant — just like solar power is! That's why so many homeowners have been happy with making the switch to solar.

Best National Provider

SunPower

★★★★★
5.0

  • Most efficient panels on the market
  • National coverage
  • Cradle to Cradle sustainability certification
  • Great warranty coverage
  • Expensive
  • Customer service varies by local dealer

Best Solar Financing

Blue Raven Solar

★★★★★
4.5

  • Industry-leading in-house financing
  • Competitive pricing
  • Excellent reputation
  • Doesn't offer solar batteries

Best Warranty Coverage

ADT Solar

★★★★★
4.0

  • Industry-leading warranty coverage
  • Expansive service area
  • Some reported communication issues
  • No leases or PPAs

EcoWatch's Oak Brook, IL Solar Company Rankings FAQs

What is the best solar installer in Oak Brook?

The highest-rated local solar company in Oak Brook is ilumen Solar, with a rating of 4.01 stars.

What are the best and worst things about solar power?

A few of the biggest pros are that it lowers your electricity bills, it's a sustainable source of energy, and it gives you a good return on your investment (ROI). The most notable cons are that solar panels don't work as well when there's limited direct sunlight, the installation cost is pricey and solar panels can be an eyesore.

How long does it take to see a return on your investment after buying solar panels?

The average payback period for solar panel installation is about 13.8 years, but the exact period varies depending on local electricity costs, incentives and net metering programs.

What is solar panel capacity and how much do I need for my house?

Solar panel capacity is how much energy the panels can generate under ideal conditions (a sunny day around noon). The average household requires between 20 and 35 panels to cover their energy needs.

Our goal is to reach as many people as we can with sensible solutions like solar energy. Our team of full-time local researchers collects solar price and installation data for every city in America then compiles it to create these digestible city guides. If you want to read our solar expert’s opinion on the top solar companies featured here, follow this link.

Company research was conducted by Melissa Smith and Karsten Neumeister. Local data analysis was conducted by James Savino. See something we missed or could do better? Email the editor.