The renewable energy industry in Illinois is a vast and vibrant market. Diverse companies deliver solutions ranging from wind, solar, to portable off-grid systems. They provide utility-scale projects, individual homes, and businesses with cost-effective, sustainable energy. As Illinois aims at 100% clean energy by 2050, this industry is poised for rapid growth and expansion, sparking innovation and development of advanced technology.


Top 25 renewable 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. Sun King

  • Website: sunking.com
  • Headquarters: Chicago, Illinois, United States
  • Founded: 2009
  • Headcount: 1001-5000
  • Latest funding type: Series D
  • LinkedIn

Sun King is a company that provides portable power solutions for bright light and phone charging. They offer a range of solar inverters, solar lanterns, and expandable home power systems. Customers can choose from various models and options to meet their energy needs. The company aims to power access to brighter lives through off-grid solar solutions.


3. Goldwind Americas

Goldwind Americas is a leading provider of wind turbine technology, specializing in advanced, cost-efficient Permanent Magnet Direct-Drive (PMDD) turbines. They offer a suite of utility-scale solutions and customized technology services to a wide range of customers, from Fortune 500 companies to utility-scale projects.


4. Enertech Global, LLC

EnertechUSA is a company that specializes in energy-efficient solutions for heating, cooling, and hot water generation. They offer innovative products such as air-to-water heat pumps and geothermal systems. With a focus on sustainability and quality, EnertechUSA aims to make energy independence accessible through their exceptional products and support.


5. 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.


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. 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.


8. Hardt Electric, Inc.

Hardt Electric is a licensed electrical contractor based in Chicago, offering high quality electrical solutions for commercial, industrial, and residential customers. They specialize in tackling electrical issues of all sizes and scopes, providing exceptional value through their adherence to Agile Construction® best practices. Hardt Electric also has a division focused on renewable energy solutions such as solar, wind, electrical retrofits, and EV car charging.


9. Greencells

GreenCells.org is a company that offers sustainable energy solutions. They specialize in renewable energy technologies such as solar power, wind power, and energy storage. Their aim is to provide clean and reliable energy sources to both residential and commercial customers.


10. MetalMiner

AGMetalMiner is a global mining company focused on developing a renewable energy ecosystem for green hydrogen production throughout Southern Africa. They aim to decarbonize and reduce emissions while improving local energy grids. The company's operations include constructing on-site solar plants and off-site wind farms. They also explore opportunities in hydrogen corridors, transport routes, and supply chain infrastructure.


11. EZ Blockchain

EZ Blockchain is a tech company that solves the global waste energy problem using crypto mining. They leverage renewable energy sources such as wind and solar to transform wasted energy into a new revenue stream in cryptocurrency. With their SmartGrid™ system, they reduce CO2 emissions by up to 70% while providing a profitable and sustainable solution for the oil and gas industry.


12. PNE USA, Inc.

PNE USA is a leading renewable energy company with projects in development and operating throughout the United States, specializing in utility-scale wind, photovoltaic solar, and energy storage projects.


13. SoCore Energy

Clean Energy Project Builder (CEPB) is a directory that connects individuals and organizations with service providers in the solar and wind energy industries. It also allows users to add their installed solar or wind projects to the map to share with others.


14. Windfree Solar

  • Website: windfree.us
  • Headquarters: Chicago, Illinois, United States
  • Founded: 2009
  • Headcount: 11-50
  • LinkedIn

Windfree Solar offers solar energy solutions to businesses and homes in the Chicagoland area. They aim to help reduce energy costs and carbon footprint by designing and developing solar energy solutions.


15. C&a;E Solutions

  • Website: ce-energysolutions.com
  • Headquarters: Libertyville, Illinois, United States
  • Founded: 2019
  • Headcount: 11-50

C&E Energy Solutions helps clients save money on their energy costs through alternative energy sources, such as solar, wind, and geothermal systems. They specialize in serving Illinois and Southern Wisconsin and are NABCEP certified.


16. Wind Water & Light Artisans Gallery

Windwaterlight.com offers sustainable and innovative energy-saving technologies for residential, commercial, and industrial buildings. Their products include solar panels, wind turbines, and energy-efficient LED lighting solutions.


17. Nu Nrgy Inc

International Export


18. Conservation Energy, Inc.

We are a customer-centric energy company headquartered in the Chicago suburbs, dedicated to providing efficient electricity and natural gas solutions for commercial and governmental businesses in Illinois. Through our consultative approach, we focus on helping our customers power their businesses and facilities in the most energy efficient and cost-effective way to help manage their energy expenses. Conservation Energy operates in 4 segments: Distribution, Government Aggregation, Commercial Electricity, and Commercial Gas. Our company serves and partners with various private and public sectors including state and local government, marketers, retail distributors, wholesale customers, electric utilities, independent power producers, property managers, and commercial and industrial companies/organizations. Change is constant, so our commitment to our customers is ... - as organizations face new challenges and obstacles in the business environment, we will always be there with new approaches and strategies to fit each business’s situation uniquely - consistently research and provide solutions to anticipate future needs - offer a comprehensive suite of available solutions - world class customer service focused on 100% customer satisfaction Our Mission Our team members live our values everyday both inside and outside the workplace, everywhere we live and work, for the benefit of our customers, communities, partners and employees. Join us now in empowering you to conserve. Please visit us at info@conservationenergy.com to learn more. Please visit us at http://conservationenergy.com/


19. Geothermal Heating

  • Website: kissrs.com
  • Headquarters: Rockford, Illinois, United States
  • Headcount: 11-50

geothermal,solar, wind energy,energy audit,free estimates,Earthlink, direct expansion, drilling, water heating, pooling heating,Rockford Illinois, winnebago county... Geothermal heating and air conditioning Rockford Illinois


20. Geothermal Companies

  • Website: digtheheat.com
  • Headquarters: Greenville, Illinois, United States
  • Headcount: 1-10

A comprehensive guide to Geothermal Energy and Renewable Energy Resources. Geothermal heating and cooling systems are covered in depth as well as radiant floor heating, solar power, wind energy, hydrogen and biofuel.


21. Organics of Chicago

Organics of Chicago’s mission is to introduce Chicagoland communities to urban, renewable technologies through hands-on, inquiry-based learning while providing the local community with fresh, organic produce. The Center’s focus will be on offering housing, employment and counseling to deserving, local domestic violence victims and run-away teens with the intention of self-improvement and overall community betterment.


22. Patten Power Rental

Patten Power specializes in providing efficient and cost-effective power solutions for the modern world.


23. Sargent & Lundy

Sargent & Lundy is a global leader in power and energy with expertise in grid modernization, renewable energy, energy storage, nuclear power, and fossil fuels. They offer comprehensive project services, including consulting, design, and implementation, as well as construction management, commissioning, and operations/maintenance.


24. green HVACR Magazine

  • Website: greenhvacrmag.com
  • Headquarters: Chicago, Illinois, United States
  • Headcount: 51-200

Green HVACR Magazine is a publication that focuses on news, products, and ideas within the HVACR industry, with an emphasis on sustainability and efficiency.


25. Scranton Heating & Cooling, INC.

Scranton Heating & Cooling - The Comfortman™ offers high-quality in-home comfort equipment including Trane heating and cooling equipment, Mitsubishi Ductless Systems, and Geocomfort geothermal systems. They also design and install solar systems to help customers further reduce their power bills.


Want to find more renewable energy companies?


If you want to find more companies that offer a variety of clean, sustainable energy solutions 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!