Among the rich expanse of the Midwestern prairies, Illinois possesses a vibrant solar energy industry that is continually rising. Companies in this sector are involved in an array of practices, ranging from technical installation services to advisory roles in renewable investment undertakings. Leveraging the potential of solar power, these companies provide cost-effective and sustainable solutions for both residential and commercial customers, aiding in the global shift towards renewable energy. As our reliance on fossil fuels diminishes, these Illinois-based solar energy companies play a pivotal role in shaping the renewable future, offering complete, bespoke, and high-tech solutions to a myriad of energy needs.


Top 21 solar energy companies in Illinois

1. Invenergy LLC

  • Website: invenergy.com
  • Headquarters: Chicago, Illinois, United States
  • Founded: 2001
  • Headcount: 1001-5000
  • Latest funding type: Private Equity
  • LinkedIn

Invenergy is a sustainable energy company that specializes in wind, solar, storage, natural gas, and clean water solutions. They offer full-service capabilities, taking projects from the drawing board to reality with in-house expertise. Invenergy services and operates sustainable energy assets with an owner's mindset. They invest in digital solutions for energy and industry.


2. Marathon Capital

Marathon Capital is an investment banking firm that specializes in renewable power, sustainable technologies, and infrastructure markets. They provide advisory services for mergers and acquisitions, corporate and asset financing, tax equity, and offtake transactions.


3. Timberlyn, Inc.

  • Website: timberlyn.com
  • Headquarters: Geneseo, Illinois, United States
  • Founded: 1990
  • Headcount: 51-200
  • LinkedIn

Timberlyn Lighting Management, Inc. is a company that specializes in providing solar installation services, lighting services, and electrical services. With a team of experienced electricians and lighting technicians, they offer cost-effective solutions for residential and commercial customers. They design solar arrays based on factors such as available space, solar panel efficiency, and peak sun hours. Timberlyn also helps customers take advantage of incentives and credits to offset their energy bills. They serve a variety of customer groups, including homeowners, businesses, and agricultural clients. The company's business model revolves around providing services and solutions related to renewable energy and lighting management.


4. Sun Badger Solar

  • Website: sunbadger.com
  • Headquarters: Chicago, Illinois, United States
  • Founded: 2018
  • Headcount: 51-200
  • LinkedIn

Sun Badger is a solar energy company that offers solar system installation and battery backup systems. They handle the entire process, including permitting, site assessment, and utility company coordination. With their expertise and best-in-market equipment, they provide outstanding workmanship warranties and exceptional customer service.


5. GRNE Solar

  • Website: grnesolar.com
  • Headquarters: Palatine, Illinois, United States
  • Founded: 2012
  • Headcount: 51-200
  • LinkedIn

GRNE Solar is an EPC firm that offers design and installation services for commercial and utility-scale solar energy solutions. They also provide residential solar installation and services such as battery backup and EV chargers.


6. Edelman Inc.

Edelman Inc. is a company that offers a range of services including heating, electrical, solar energy, plumbing, and indoor air quality solutions. With a team of trained professionals, they provide installation, repair, and maintenance services for residential and commercial customers. They also offer financing options for their products and services, ensuring that customers can meet their home needs while paying over time.


7. 93Energy

  • Website: 93energy.com
  • Headquarters: Skokie, Illinois, United States
  • Founded: 2018
  • Headcount: 11-50
  • LinkedIn

93 Energy is a company that specializes in solar energy solutions for both residential and commercial customers. They offer services such as solar panel installation, energy storage options, and electric vehicle (EV) charging solutions. With a focus on reliability, affordability, and customer satisfaction, they provide industry-leading protection and financing options for their customers' solar systems.


8. Solar Sale USA LLC

Solar Sale USA is a company that offers installation and sale of solar panels. They also provide information on incentives and financial relief options for solar panel installation.


9. Iconic Energy

  • Website: iconicnrg.com
  • Headquarters: Rockford, Illinois, United States
  • Founded: 2015
  • Headcount: 11-50
  • LinkedIn

Iconic Energy is a Midwest solar installation company based in Rockford, Illinois. They specialize in providing clean and affordable electricity to homes and businesses in the Midwest.


10. Tron Solar

  • Website: tron.solar
  • Headquarters: Vernon Hills, Illinois, United States
  • Founded: 2018
  • Headcount: 11-50
  • LinkedIn

Tron Solar is an innovative solar energy company that offers consultation, installation, maintenance, and repair services for residential, commercial, and industrial properties. They provide custom-tailored solar energy systems, aiming to make the planet cleaner and reduce utility costs. With excellent customer care and eco-friendly innovation, Tron Solar is known for its high-quality installations and has received outstanding reviews.


11. TruHome Pros LLC.

TRUHOME Pros is a solar energy company that offers homeowners the opportunity to switch to renewable energy and save money on electricity bills. They provide solar panel installation services and also offer roofing services to homeowners who are interested in bundling a new roof with their solar installation for added savings and increased home value.


12. Certasun

  • Website: certasun.com
  • Headquarters: Buffalo Grove, Illinois, United States
  • Founded: 2018
  • Headcount: 11-50
  • LinkedIn

Certasun is a premier home solar company based in Buffalo Grove, Illinois, serving homeowners in Illinois and Wisconsin. They offer the SunPower Equinox solar system, which includes powerful, attractive, and long-lasting solar panels. They provide financing options with zero upfront cost and a low monthly payment, making solar cost less than traditional electricity. Certasun guarantees exceptional customer experience and has high standards for aesthetics and professionalism.


13. Ultra Energy Solar

Ultra Energy Solar is a company that provides solar energy solutions to residential areas. They offer easy installation, free maintenance, and a 30-year warranty for homeowners to generate their own electricity and save money on their electric bills.


14. Tick Tock Energy, Inc.

Tick Tock Energy helps individuals and businesses take control of their energy. They reduce utility costs through energy-efficiency, produce energy with solar and wind power, and manage energy to lower consumption and costs.


15. Headline Solar

Headline Solar is a leading provider of residential battery systems and solar integration technology. With a focus on safety and sustainability, they offer cobalt-free battery systems that seamlessly integrate with solar and home automation systems. Backed by an unbeatable warranty, their smart solutions keep homes powered during power outages for cleaner, healthier living.


16. SunStyle

  • Website: sunstyle.com
  • Headquarters: Skokie, Illinois, United States
  • Founded: 2007
  • Headcount: 11-50
  • LinkedIn

SunStyle offers clean and sustainable energy solutions through their solar roof products. They prioritize the combination of environmental friendliness and aesthetic appeal, ensuring that solar energy production does not compromise the preservation of historical roofscapes and townscapes. They provide solar shingles and roofing materials that are durable and efficient, even in harsh weather conditions. SunStyle welcomes partnerships with certified installers and is committed to the clean energy transition.


17. Verde Solutions LLC

Verde Solutions is a company that specializes in providing comprehensive energy solutions to diverse clients. They offer services such as solar energy, electric vehicle charging systems, commercial energy storage, and HVAC solutions. With a team of innovative experts in engineering and project management, Verde Solutions ensures timely delivery of projects within budget. Their focus on green energy and sustainability makes them a leader in turnkey sustainable energy solutions.


18. WCP Solar

  • Website: wcpsolar.com
  • Headquarters: Naperville, Illinois, United States
  • Founded: 2007
  • Headcount: 11-50
  • LinkedIn

WCP Solar is a commercial and residential solar contractor based in Illinois. They specialize in solar design, installation, and roofing services. With over 50 years of combined experience in the industry, they offer professional and reliable solar solutions to their customers.


19. Kaiser Electrical Contractors, Inc.

Kaiser Electrical Contractors is a service-oriented company specializing in residential and commercial electrical solutions. With a 30-year track record of success, we offer expertise in complex petroleum industry electrical, home and commercial wiring, home and office electronic system wiring, and alternative energy implementation like solar power, generators, and electric car charging stations.


20. Brite Energy

Brite is a vertically integrated clean energy company specializing in solar. Powered by Protection 1 (the nation’s largest, full-service security company) and co-owned by GTCR ($11 billion Chicago-based private equity fund), Brite is an energy provider poised to redefine the customer experience in energy distribution.


21. Solar Power Midwest

Solar Power Midwest is a solar panel installation company that provides easy financing services for cheaper and renewable energy options. They offer complete installation and maintenance of solar panel systems to promote the use of renewable energy, especially solar energy.


Want to find more solar energy companies?


If you want to find more companies that offer a wide range of services from solar installations, sustainability advisories, renewable investments to unique digital solutions for energy you can do so with Inven. This list was built with Inven and there are hundreds of companies like these globally.


With Inven you'll also get to know the company's:


  • Ownership: Which of these are private equity backed? Which are family-owned?
  • Contact data: Who are the owners and CEO's? What are their emails and phone numbers?
  • Financials: How do these companies perform financially? What are their revenues and profit margins?

...and a lot more!