The energy storage industry in Illinois is a diverse sphere, filled with companies providing innovative solutions aimed at the growing renewable energy sector. The industry constitutes businesses catering to multifarious segments ranging from circuit protection for battery energy storage systems to full-service sustainable energy projects. Nurturing a blend of both established corporations and dynamic startups, these companies play a vital role in the state's move towards decarbonization and cleaner energy sources. The services offered cover a broad spectrum which includes but is not limited to power grid solutions, microwave tubes, and digital solutions for energy. The trajectory of the industry hints at a future heavily reliant on revolutionary technologies and increased storage capabilities.


Top 24 energy storage companies in Illinois

1. Littelfuse

  • Website: littelfuse.com
  • Headquarters: Chicago, Illinois, United States
  • Founded: 1927
  • Headcount: 10001+
  • Latest funding type: Acquired
  • LinkedIn

Littelfuse is a company that offers circuit protection solutions, specializing in products for battery energy storage systems. They provide a wide range of products to protect and extend the life of equipment. With over 95 years of experience, Littelfuse is a trusted name in the industry.


2. 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.


3. Richardson Electronics, Ltd.

  • Website: rell.com
  • Headquarters: Lafox, Illinois, United States
  • Founded: 1947
  • Headcount: 201-500
  • Latest funding type: Ipo
  • LinkedIn

Richardson Electronics, Ltd. is a global provider of engineered solutions, power grid and microwave tubes, as well as new solid-state technologies and energy storage solutions.


4. IHI Terrasun Solutions

IHI Terrasun Solutions is an energy storage system solutions provider offering advanced controls for reliable access to different markets. They specialize in standalone and solar plus storage projects, supported by advanced software.


5. 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.


6. 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.


7. GlidePath Power Solutions

  • Website: glidepath.net
  • Headquarters: Elmhurst, Illinois, United States
  • Founded: 2013
  • Headcount: 11-50
  • Latest funding type: Seed
  • LinkedIn

GlidePath is a leading independent developer and owner of advanced energy systems, specializing in renewable energy and battery storage projects across the United States.


8. Volta Energy Technologies

  • Website: volta.vc
  • Headquarters: Warrenville, Illinois, United States
  • Founded: 2017
  • Headcount: 11-50
  • LinkedIn

Volta Energy Technologies is an investment company focused on battery and energy storage technology. They identify and invest in promising innovations, performing diligent research and evaluation with the support of global research institutions. Volta connects innovators with corporate investors, driving returns for all. Their team has expertise in both technology and business, with the ability to advance energy technologies from the lab to the market. They have a strong network of innovators and strategic partners, allowing them to impact the energy landscape and identify disruptions in the industry.


9. Hecate Energy LLC

  • Website: hecateenergy.com
  • Headquarters: Chicago, Illinois, United States
  • Founded: 2012
  • Headcount: 11-50
  • Latest funding type: Debt Financing
  • LinkedIn

Hecate Energy is a renewable energy company that specializes in building and operating utility-scale solar and energy storage projects in North America.


10. Westinghouse Battery

Westinghouse Battery Solutions is a company that offers energy storage solutions for residential and commercial properties.


11. Invenergy Edge

Invenergy Edge is an end-to-end, full-service, technology-agnostic energy partner that simplifies energy needs. They offer upfront analysis, turnkey design and construction, system financing, and optimization and verifiable monitoring. They increase reliability with on-site energy solutions, such as energy storage, generators and fuel cells, and intelligent controls.


12. Endurant Energy

  • Website: endurant.com
  • Headquarters: Chicago, Illinois, United States
  • Founded: 2005
  • Headcount: 11-50
  • LinkedIn

Endurant is a market-leading distributed energy solutions provider, owner, and operator. With extensive expertise in all of the technologies they build, including Combined Heat and Power, Energy Foundations, Energy Storage, Fuel Cell, Geothermal, Microgrid, and Solar, Endurant offers reliable, resilient, clean, and cost-effective energy infrastructure solutions.


13. Pv Services Inc

  • Website: bpvs.com
  • Headquarters: Belleville, Illinois, United States
  • Headcount: 1-10
  • LinkedIn

Berkshire Photovoltaic Services (BPVS) is a leading provider of turn-key solar projects for commercial, institutional, and residential clients. With over 30 years of experience, they help customers evaluate their electrical consumption, design PV systems that fit their budget and electrical needs, and complete all necessary permitting and rebate forms. BPVS offers reliable equipment and PV components, manufactured regionally and by established manufacturers.


14. 11 Million Acres

11 Million Acres offers tailored end-to-end enterprise energy solutions combining energy management best practices, energy efficiency improvements, onsite power generation, and energy storage systems to deliver lower operating costs, increased net operating income, and maximum rebates and tax incentives.


15. Continental Energy Solutions

  • Website: cesnrg.com
  • Headquarters: Oak Brook, Illinois, United States
  • Founded: 2009
  • Headcount: 11-50
  • LinkedIn

Continental Energy Solutions (CECS) is a solar panel installer and maintenance provider for commercial and industrial customers in Illinois, Chicago, and Midwest. They offer microgrid, roof mount, and solar battery storage solutions to help customers reduce their carbon footprint and maximize energy savings.


16. 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.


17. CDP Energy

  • Website: cdpenergy.com
  • Headquarters: Chicago, Illinois, United States
  • Founded: 2000
  • Headcount: 51-200
  • LinkedIn

CDP Energy is a company that offers a range of energy solutions including power distribution units, solar products, energy storage, data center solutions, engineering services, and training through their Academy. They provide protection equipment, UPS systems, batteries, and more. With a focus on energy efficiency and sustainability, CDP Energy caters to various customer groups.


18. Enercon

Enercon is a power solutions company with nearly 50 years of experience. They offer industry insights, expert advice, and a range of services including OEM control panels, power integration, and field service. Their blog, events calendar, videos, case studies, and webinars provide in-depth knowledge and guidance. They cater to defense, commercial, municipal/utilities, industrial, and renewable energy industries.


19. Intelligent Generation

  • Website: intelgen.com
  • Headquarters: Chicago, Illinois, United States
  • Founded: 2009
  • Headcount: 1-10
  • Latest funding type: Corporate Round
  • LinkedIn

Intelligent Generation empowers commercial and industrial enterprises to join the democratized and distributed renewable energy future by providing compelling returns for solar and storage projects.


20. 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.


21. 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.


22. Energize Ventures

  • Website: energize.vc
  • Headquarters: Chicago, Illinois, United States
  • Founded: 2016
  • Headcount: 11-50
  • LinkedIn

Energize.vc is a company focused on scaling sustainable innovation through climate software.


23. 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.


24. Duracell Inc.

  • Website: duracell.com
  • Headquarters: Chicago, Illinois, United States
  • Founded: 1924
  • Headcount: 1001-5000
  • Latest funding type: Acquired
  • LinkedIn

Duracell.com is an online platform that offers a range of power stations and related products. They provide a variety of power stations with different power capacities, as well as solar panels. Customers can register their power stations, contact customer service, and purchase products through the website.


Want to find more energy storage companies?


If you want to find more companies that provide a diverse spectrum of energy technologies and services 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!