The solar power industry in Illinois is a thriving sector dedicated to harnessing renewable energy through solar technology. Companies engage in solar power generation, installation, and energy efficiency solutions, catering to both residential and commercial customers. The push towards sustainability is propelling growth in this industry, with significant advancements in solar technology and financing options. As interest in clean energy escalates, states like Illinois are fostering innovations that make solar solutions more accessible than ever before. With ambitious state regulations and incentives, the future appears bright for solar power's contribution to Illinois' energy matrix.

The companies highlighted in this list represent a range of sizes and specialties within the solar power sector, primarily located in Chicago and surrounding areas. Founded between 2006 and 2023, these firms vary from small teams of under 50 employees to major players with over 10,000 staff. Their focus areas encompass solar panels, installation services, energy storage, and electric vehicle charging solutions. Notable firms include Greenlight Planet and Hecate Energy, demonstrating a commitment to transforming Illinois' energy landscape with tailored solutions.

Continue reading to discover Illinois' top solar power companies.

Top 20 Solar Power Companies in Illinois

1. Greenlight Planet

• Website: greenlightplanet.com
• Ownership type: Private Equity
• Headquarters: Chicago, Illinois, United States (USA)
• Employee distribution: Kenya 35%, Nigeria 29%, India 16%, Other 20%
• Latest funding: $10.0M, February 2015
• Founded year: 2009
• Headcount: 1001-5000
• LinkedIn: greenlightplanet

Greenlight Planet, now operating under the brand name Sun King, was founded in 2009 and is headquartered in Chicago, Illinois. The company specializes in solar energy solutions aimed at off-grid households and businesses, providing products such as solar lanterns, home systems, and inverters. Their innovative approach includes direct sales, financing options, and partnerships with local distributors to effectively reach their customers. With a workforce of approximately 1,792 employees, Sun King has established a strong presence in key markets, including Kenya, Nigeria, India, and Tanzania. The company has extended nearly $1 billion in solar loans to households, demonstrating their commitment to making solar energy accessible. Since its inception, Sun King has sold over 25 million solar products, significantly impacting the lives of millions by providing reliable and clean energy alternatives to traditional, polluting energy sources.

2. Hecate Energy LLC

• Website: hecateenergy.com
• Ownership type: Private
• Headquarters: Chicago, Illinois, United States (USA)
• Employee distribution: United States (USA) 100%
• Latest funding: Other (Debt), $550.0M, January 2023
• Founded year: 2012
• Headcount: 11-50
• LinkedIn: hecate-energy-llc

Hecate Energy LLC, based in Chicago, Illinois, is a renewable energy developer that specializes in solar and wind energy projects, as well as energy storage solutions. Since its inception in 2012, the company has focused on creating customized energy solutions for a variety of clients, including municipal utilities, investor-owned utilities, and educational institutions. Hecate Energy operates across multiple locations in the United States, emphasizing innovative project development and strong community partnerships. The company has a significant project pipeline, boasting around 35 GW of renewable energy projects, which includes the recent approval of New York's largest solar farm, the 500-megawatt Cider Solar Farm. In January 2023, Hecate secured a $550 million credit facility to support its ambitious growth plans, further solidifying its position in the renewable energy market. Hecate Energy's commitment to enhancing electric reliability and sustainability through clean energy solutions is evident in its extensive project portfolio and collaborative approach to energy development.

3. Certasun

• Website: certasun.com
• Ownership type: Private
• Headquarters: Buffalo Grove, Illinois, United States (USA)
• Employee distribution: United States (USA) 100%
• Founded year: 2018
• Headcount: 11-50
• LinkedIn: certasun

Certasun is a private solar energy company based in Buffalo Grove, Illinois, founded in 2018. The company specializes in residential solar installations, EV charger installations, and home battery systems, primarily serving homeowners in the Chicago and Milwaukee areas. Certasun aims to help customers reduce energy costs while promoting sustainability through clean energy solutions. They pride themselves on providing a high-quality customer experience, managing all aspects of the installation process in-house, from consultations to project execution. With over 2,000 solar projects completed, Certasun has built a reputation for professionalism and integrity, as evidenced by their strong customer reviews. They also offer services related to home electrification, including heat pump water heaters, further enhancing their role in the clean energy transition.

4. Verde Solutions

• Website: verdesolutions.com
• Ownership type: Corporate
• Headquarters: Chicago, Illinois, United States (USA)
• Employee distribution: United States (USA) 100%
• Latest funding: January 2022
• Founded year: 2012
• Headcount: 11-50
• LinkedIn: verde-solutions-llc

Verde Solutions, based in Chicago, Illinois, is an energy consulting firm that has been operational since 2012. The company specializes in sustainable energy solutions, particularly in solar energy installation, electric vehicle (EV) charging infrastructure, and energy-efficient HVAC systems. Verde Solutions offers a comprehensive suite of services that includes consulting, engineering, and project management, ensuring that clients receive customized solutions tailored to their specific energy needs. With a team of experienced professionals, Verde Solutions has successfully completed numerous projects across various sectors, helping clients reduce energy costs and improve sustainability. Their focus on solar energy is evident in their extensive project portfolio, which includes significant installations for educational institutions and commercial entities. Verde Solutions is committed to promoting renewable energy and assisting clients in navigating the complexities of energy efficiency and sustainability.

5. Tron Solar

• Website: tron.solar
• Ownership type: Private
• Headquarters: Vernon Hills, Illinois, United States (USA)
• Employee distribution: United States (USA) 100%
• Founded year: 2018
• Headcount: 51-200
• LinkedIn: tron-solar

Tron Solar, based in Vernon Hills, Illinois, is a private company that specializes in renewable energy solutions, particularly solar energy systems tailored for homes and businesses. Founded in 2018, Tron Solar has quickly made a name for itself by offering a range of products including solar panels, battery storage systems, and electric vehicle chargers. The company focuses on helping customers reduce energy costs and achieve greater energy independence. Their services extend to both residential and commercial sectors, with a strong emphasis on installation and maintenance of solar energy systems. Tron Solar prides itself on its customer-centric approach, providing what they describe as '5-star white glove service' and actively engaging in solar education to empower clients with knowledge about their energy options.

6. Carbon Solutions Group

• Website: carbonsolutionsgroup.com
• Ownership type: Private
• Headquarters: Chicago, Illinois, United States (USA)
• Employee distribution: United States (USA) 100%
• Founded year: 2006
• Headcount: 11-50
• LinkedIn: carbon-solutions-group

Carbon Solutions Group, founded in 2006 and based in Chicago, Illinois, is a private renewable energy company that specializes in solar energy solutions, electric vehicle charging infrastructure, and environmental consulting services. With a workforce of 38 employees, the company has made significant strides in the solar industry, particularly in SREC aggregation, where they have facilitated transactions for over 20,000 solar homeowners, nonprofits, and businesses. Their operations extend across 20 states, showcasing their ability to navigate complex regulatory environments and provide tailored solutions to their clients. In addition to solar, Carbon Solutions Group is also involved in developing electric vehicle charging infrastructure, with a pipeline of over 1,000 chargers, and offers ESG advisory services to help organizations reduce their carbon emissions. Their multi-faceted approach positions them as a relevant player in the renewable energy market.

7. LG Solar USA

• Website: lgsolarusa.com
• Ownership type: Private
• Headquarters: Lincolnshire, Illinois, United States (USA)
• Employee distribution: United States (USA) 54%, India 18%, South Korea 9%, Other 19%
• Founded year: 1958
• Headcount: 10001+
• LinkedIn: lg-solar-usa

LG Solar USA, based in Lincolnshire, Illinois, is a private solar energy company that specializes in the manufacturing and distribution of solar panels, inverters, and various solar energy applications. Founded in 1958, the company has established itself as a key player in the solar industry, serving a wide range of clients including residential homeowners, commercial businesses, and industrial entities. LG Solar USA is dedicated to facilitating the transition to renewable energy sources, helping clients reduce their energy costs and minimize their environmental footprint. The company’s product offerings include advanced photovoltaic (PV) systems that convert sunlight into electricity, as well as solar inverters that enhance energy conversion efficiency. With a workforce that spans multiple countries, including significant operations in the United States, India, and South Korea, LG Solar USA is well-positioned to meet the growing demand for solar energy solutions.

8. Day & Night Solar

• Website: dayandnightsolar.com
• Ownership type: Private
• Headquarters: Collinsville, Illinois, United States (USA)
• Employee distribution: United States (USA) 100%
• Founded year: 2009
• Headcount: 11-50
• LinkedIn: day-night-solar

Day & Night Solar, based in Collinsville, Illinois, is a private solar energy provider that specializes in turn-key solar solutions for businesses and organizations. Since its inception in 2009, the company has focused on delivering comprehensive services that include the design, installation, financing, and maintenance of solar energy systems. With a mission to help clients reduce energy costs and transition to renewable energy sources, Day & Night Solar operates throughout the United States, including Alaska and Hawaii, and has expanded its reach to Canada and Mexico. The company prides itself on its integrity and customer service, employing highly trained installers and support staff to ensure high-quality solar products and installations. They also assist clients in navigating the complexities of grant paperwork and financing options, making the adoption of solar energy more accessible. Day & Night Solar's commitment to local contractors and communities further enhances its role in the solar industry, as they aim to improve efficiency and profitability for their partners while promoting sustainable energy solutions.

9. 93Energy

• Website: 93energy.com
• Ownership type: Private
• Headquarters: Skokie, Illinois, United States (USA)
• Employee distribution: United States (USA) 100%
• Founded year: 2018
• Headcount: 11-50
• LinkedIn: 93energy

93Energy, based in Skokie, Illinois, is a private solar energy provider that specializes in solar panel installation, energy storage solutions, and electric vehicle (EV) charger installations. Founded in December 2018, the company serves both residential and commercial customers, aiming to reduce energy costs and promote sustainability through renewable energy solutions. With a team of professionals, 93Energy assesses clients' energy needs and designs tailored solar systems. They also offer financing options and guidance on local, state, and federal incentives, making solar energy more accessible. Their focus on customer satisfaction is evident in their service approach, which includes a customer happiness guarantee. As a relatively young company, 93Energy is actively contributing to the solar energy sector in the Midwest, helping clients transition to cleaner energy sources while managing their energy expenses effectively.

10. Tick Tock Energy, Inc.

• Website: ticktockenergy.com
• Ownership type: Private
• Headquarters: Effingham, Illinois, United States (USA)
• Employee distribution: United States (USA) 100%
• Founded year: 2006
• Headcount: 11-50
• LinkedIn: ticktockenergy

Tick Tock Energy, Inc., based in Effingham, Illinois, specializes in renewable energy solutions with a strong emphasis on solar energy and energy efficiency. Since its inception in 2006, the company has been dedicated to helping both residential and commercial clients reduce energy costs and enhance sustainability. Their offerings include a variety of solar energy systems such as roof-mounted and ground-mounted solar panels, as well as innovative solutions like solar trackers and off-grid systems. In addition to solar installations, Tick Tock Energy provides energy efficiency services, including LED lighting and power management solutions. The company is also involved in community solar initiatives, allowing individuals and businesses to benefit from solar energy without needing to install systems on their own properties. Their commitment to quality is underscored by their Pearl Certification, which signifies high standards in solar installation and energy efficiency. Tick Tock Energy's focus on customer education and incentives further positions them as a relevant player in the renewable energy market.

11. SunVest Solar, LLC

• Website: sunvest.com
• Ownership type: Private
• Headquarters: Chicago, Illinois, United States (USA)
• Employee distribution: United States (USA) 100%
• Latest funding: Other (Debt), $154.0M, December 2022
• Founded year: 2009
• Headcount: 51-200
• LinkedIn: sunvest-solar-inc-

SunVest Solar, LLC is a solar energy developer based in Chicago, Illinois, specializing in the design, construction, and management of solar energy projects. Established in 2009, the company has built a reputation for providing tailored solar solutions aimed at reducing energy costs and promoting sustainability. SunVest operates across multiple states in the U.S., serving a range of clients including commercial businesses, utilities, and municipalities. They are recognized for their expertise in community solar projects and have developed a significant pipeline of nearly two gigawatts of projects across 18 states. In December 2022, SunVest secured $154 million in funding, which underscores their growth trajectory and commitment to advancing clean energy initiatives. Their comprehensive approach includes development, construction, financing, and operations, making them a notable player in the solar energy sector.

12. Ailey Solar Electric, Inc.

• Website: aileysolar.com
• Ownership type: Private
• Headquarters: Chicago, Illinois, United States (USA)
• Employee distribution: United States (USA) 100%
• Founded year: 2007
• Headcount: 11-50
• LinkedIn: ailey-solar-electric-inc-

Ailey Solar Electric, Inc. is a solar installation company based in Chicago, Illinois, specializing in renewable energy solutions tailored for residential, commercial, and non-profit sectors. Since its inception in 2007, Ailey Solar has dedicated itself to helping clients transition to sustainable energy sources while reducing their energy costs. The company prides itself on its local expertise, having served the Chicagoland area for over 17 years. Ailey Solar is committed to community engagement, particularly in historically marginalized areas, reflecting its mission to empower local communities through clean energy. The firm offers a range of services, including in-house solar installations and various financing options, making solar energy accessible to a broader audience. Their approach emphasizes customer satisfaction and quality, as evidenced by positive client testimonials and a strong referral network. Ailey Solar's focus on environmental stewardship and community impact positions it as a relevant player in the solar industry.

13. United American Marketing

• Website: uampower.com
• Ownership type: Private
• Headquarters: Oak Brook, Illinois, United States (USA)
• Founded year: 2013
• Headcount: 51-200
• LinkedIn: unitedamericanmarketing

United American Marketing, operating under the brand UAM Power, is an energy solutions provider based in Oak Brook, Illinois. Founded in 2013, the company focuses on renewable energy and energy efficiency services. UAM Power offers a range of products, including solar installations, energy storage solutions, and energy supply services tailored for residential customers, businesses, municipalities, and non-profits. The company has made strides in the solar industry by launching Unity Solar Group, a division dedicated to solar energy systems. UAM Power has expanded its operations across multiple states and has been recognized for its rapid growth, ranking on the INC.5000 list. Their mission emphasizes democratizing renewable energy, making it accessible and affordable, which is reflected in their community solar subscription programs and comprehensive energy solutions.

14. Iconic Energy

• Website: iconicnrg.com
• Ownership type: Family Owned
• Headquarters: Rockford, Illinois, United States (USA)
• Employee distribution: United States (USA) 100%
• Founded year: 2015
• Headcount: 11-50
• LinkedIn: iconicnrg

Iconic Energy is a family-owned solar energy company based in Rockford, Illinois, founded in 2015. The company specializes in the installation and maintenance of solar panels for residential, commercial, and agricultural customers. With a mission to provide clean and affordable electricity, Iconic Energy aims to help clients reduce their energy costs and carbon footprint. The company prides itself on its local roots and commitment to customer service, ensuring that clients receive personalized attention throughout the solar installation process. Iconic Energy also stays informed about the latest incentives and financing options available, helping customers navigate the complexities of going solar. Their team of certified installers is dedicated to delivering high-quality service and maintaining strong relationships with clients. As a licensed electrical contractor in Illinois, Iconic Energy is well-equipped to handle various solar projects, contributing to the growth of renewable energy in the Midwest.

15. Continental Energy Solutions

• Website: cesnrg.com
• Ownership type: Family Owned
• Headquarters: Oak Brook, Illinois, United States (USA)
• Employee distribution: United States (USA) 100%
• Founded year: 2009
• Headcount: 11-50
• LinkedIn: cesnrg

Continental Energy Solutions, based in Oak Brook, Illinois, is a family-owned solar energy company that specializes in commercial solar panel installations and battery storage solutions. Since its inception in 2009, the company has focused on helping businesses and organizations in Illinois reduce their energy costs and carbon footprints through customized renewable energy systems. Their services include roof mount and ground mount solar installations, community solar projects, and microgrid solutions. With a dedicated team of engineers, project managers, and field supervisors, Continental Energy Solutions has successfully completed over 90 solar PV projects and installed more than 350 electric vehicle chargers. The company is also actively involved in promoting solar and battery incentives for businesses in Illinois, showcasing their commitment to advancing the clean energy economy. Their expertise in energy management and operations and maintenance further solidifies their position in the solar industry.

16. Amps

• Website: amps-db.com
• Ownership type: Private
• Headquarters: Downers Grove, Illinois, United States (USA)
• Employee distribution: United States (USA) 89%, India 11%
• Founded year: 2022
• Headcount: 11-50
• LinkedIn: amps-db

Amps Power Solutions, based in Downers Grove, Illinois, is a private construction and engineering company founded in 2022. With a team of 11-50 employees, Amps specializes in energy solutions, particularly in solar system design, electrical gear procurement, and combined heat and power systems. They cater to a variety of sectors, including manufacturing, multifamily housing, and entertainment, focusing on delivering efficient energy solutions tailored to their clients' needs. Amps employs proprietary technology and engineering expertise to create custom energy models and project proposals. Their portfolio includes significant solar projects, such as a 97.5 kW rooftop solar panel system for The Beacon Apartments and a 3 MW roof mount solar system for Maxter Healthcare. This hands-on experience in solar energy projects highlights their commitment to advancing sustainable energy solutions.

17. Windfree Solar

• Website: windfree.us
• Ownership type: Private
• Headquarters: Chicago, Illinois, United States (USA)
• Employee distribution: United States (USA) 100%
• Founded year: 2009
• Headcount: 11-50
• LinkedIn: windfree-solar

Windfree Solar, based in Chicago, Illinois, is a private solar energy provider that has been operational since 2009. The company specializes in renewable energy solutions tailored for residential, commercial, and municipal clients. With a team of industry specialists, Windfree Solar offers a comprehensive range of services, including solar installation and energy storage, aimed at helping customers reduce their energy costs and carbon footprints. They have successfully installed solar systems for over 600 homes and various businesses across the Midwest, demonstrating their capability in managing projects of different scales. Windfree Solar is also recognized as a certified Minority Owned Business and an Equity Eligible Contractor, reflecting their commitment to community and equity in the renewable energy sector. Their focus on customer satisfaction and detailed project execution further enhances their standing in the solar industry.

18. TruHome Pros LLC.

• Website: truhome-pros.com
• Ownership type: Private
• Headquarters: Schaumburg, Illinois, United States (USA)
• Employee distribution: United States (USA) 100%
• Founded year: 2020
• Headcount: 11-50
• LinkedIn: truhome-pros

TruHome Pros LLC, based in Schaumburg, Illinois, is a private company specializing in solar installation and roofing services. Founded in 2020, the firm has quickly established itself in the Midwest, particularly in Illinois, Wisconsin, and Michigan. TruHome Pros offers a range of services, including solar panel installation, maintenance, and a unique solar and roofing program that allows homeowners to address both energy efficiency and roofing needs simultaneously. The company aims to help homeowners reduce energy costs and enhance property value through solar solutions. With a focus on quality service, TruHome Pros has garnered positive customer feedback, highlighting their professionalism and thoroughness in guiding clients through the solar installation process. They also provide financing options and emphasize the importance of tax incentives, making solar energy more accessible to homeowners. TruHome Pros is dedicated to promoting sustainable energy practices while ensuring customer satisfaction.

19. New Generation Power

• Website: newgenpower.com
• Ownership type: Private
• Headquarters: Chicago, Illinois, United States (USA)
• Employee distribution: United States (USA) 100%
• Founded year: 2009
• Headcount: 11-50
• LinkedIn: new-generation-power

New Generation Power, founded in 2009 and based in Chicago, Illinois, is a private renewable energy company dedicated to providing sustainable energy solutions. The firm focuses on various renewable energy sources, including solar, wind, hydro, biomass, and geothermal energy. With a workforce of around 41 employees, New Generation Power operates on a global scale, addressing the clean energy needs of businesses and organizations, including government and military entities. Their notable projects include the Rockford Solar Farm, recognized as one of the largest commercial airport solar farms in the United States, and a significant contract with the U.S. Army for renewable energy projects. The company aims to combat climate change by developing renewable power projects that contribute to a low-carbon future, showcasing their commitment to environmental sustainability and energy independence.

20. ENGIE Distributed Renewables

• Website: engiedistributedrenewables.com
• Ownership type: Private
• Headquarters: Chicago, Illinois, United States (USA)
• Employee distribution: United States (USA) 100%
• Founded year: 2008
• Headcount: 51-200
• LinkedIn: engie-distributed-renewables

ENGIE Distributed Renewables, a subsidiary of ENGIE North America, operates out of Chicago, Illinois, and has been active since 2008. The company is dedicated to providing renewable energy solutions, with a strong emphasis on solar power. ENGIE Distributed Renewables develops, constructs, and manages solar projects, contributing to the transition towards sustainable energy. They also engage in energy efficiency initiatives and energy storage solutions, catering to a wide range of clients, including public institutions and commercial businesses. With a focus on helping customers achieve their environmental goals and cost savings, ENGIE Distributed Renewables plays a crucial role in the renewable energy sector, particularly in solar energy deployment.

Solar Power Insights: Key Companies in Illinois

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