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2026
Solar companies in Illinois

Solar companies in Illinois

Discover Illinois' top solar companies on our definitive listing page. Aspiring to sustainable living, or searching for energy-efficient alternatives? Rotate toward the sun with our diverse roster of top-tier solar firms that excel in harnessing the power of the sun.

From Chicago to Springfield, find local solar energy providers that illuminate homes and businesses with clean, renewable power every single day. Our listed companies specialize in solar panel installation, maintenance, and innovative solar energy solutions for both residential and commercial requirements.

Whether you're looking to save on energy costs or interested in reducing your carbon footprint, our directory champions the cream of the crop in Illinois' solar industry. Experience trustworthy, quality services that perfectly align with your green energy goals.

Take a leap forward into a sustainable future by browsing through our listing. Partner with these leading solar companies in Illinois and kickstart your journey towards energy independence today. Watch the positive impact ripple from your electricity bill, to your local economy, and ultimately, the environment.

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Company
Rating
Location
Service Solar Solutions
Service Solar Solutions
Trust Millennium Carillon Solar for top-quality solar panel installations in Naperville, IL. Residential, commercial, off-grid systems, and energy storage solutions. Save money & reduce carbon footprint.
5 (1+ reviews)
Naperville, Illinois
ABC Utilities
ABC Utilities
Get reliable solar panel installation, energy-saving services, and 24/7 support from ABC Utilities, a trusted Chicagoland company. Save on utilities and experience superior service.
5 (1+ reviews)
Aurora, Illinois
Safeguard Solar LLC
Safeguard Solar LLC
Safeguard Solar offers reliable solar panel installation, battery storage, and financing options for residential and commercial clients, backed by a 2-year workmanship warranty.
5 (1+ reviews)
Aurora, Illinois
Definitive Energy Group
Definitive Energy Group offers top-notch energy management solutions, portfolio management, rate analysis, and more to optimize energy usage and maximize savings for clients in Colorado.
5 (1+ reviews)
Aurora, Illinois
Best Solar Lighting
Best Solar Lighting
Discover eco-friendly solar lighting solutions at Best Solar Lighting—choose from a variety of stylish products, save on energy bills, and make a positive environmental impact.
1 (1+ reviews)
Aurora, Illinois
Xolar
Xolar
Switch to clean energy with Xolar Renewable Energy, offering solar panel installation, maintenance, financing, and more for homes and businesses. Save money and help the planet!
5 (1+ reviews)
Aurora, Illinois
US Solution, Inc.
US Solution, Inc.
Trust U S Solution, Inc. for reliable solar & energy management systems, offering free estimates & expert service for hassle-free renewable energy solutions.
0 (0 reviews)
Chicago, Illinois
Acciona Energy North America
ACCIONA, a leading renewable energy developer, offers solar energy solutions, green energy services, and innovative battery-storage systems, prioritizing sustainability and tailor-made client needs.
4.8 (5+ reviews)
Chicago, Illinois
Illinois Solar Express, LLC
Illinois Solar Express, LLC
Top Illinois solar company offering sustainable solutions, customized design, quick installation, affordable energy & excellent customer service. Save on costs today!
5 (29+ reviews)
Oakbrook Terrace, Illinois
Millennium Solar Electric Inc.
Millennium Solar Electric Inc.
Advance your electrical trade & PV solar skills with MSETA's accredited courses for continuing education, NABCEP exams & career growth. Flexible online & in-person options available.
4.7 (53+ reviews)
Calumet City, Illinois