The solar energy industry in Connecticut focuses on harnessing renewable resources to generate clean power. Companies range from large developers working on utility-scale projects to smaller firms providing tailored installations for homes and businesses. With a strong push towards sustainability, the industry sees innovations in solar technology and financing options. This shift is propelled by state incentives aimed at expanding solar deployment and educating consumers on the benefits of green energy. Connecticut's commitment to reducing carbon emissions positions its solar sector for significant growth, encouraging investment and community engagement in renewable energy initiatives.

This list features a variety of solar energy companies headquartered in Connecticut, founded between 1985 and 2022. Company sizes range from small teams of around a dozen to larger organizations with several hundred employees. Each company specializes in different aspects of solar energy such as panel installations, energy efficiency, and innovative financing solutions. From major established players to newcomer disruptors, they reflect a robust commitment to promoting sustainable energy across the state.

Continue reading to learn about top solar energy companies in Connecticut.

Top 19 Solar Energy Companies in Connecticut

1. Greenskies Clean Focus

• Website: greenskies.com
• Ownership type: Private Equity
• Headquarters: North Haven, Connecticut, United States (USA)
• Employee distribution: United States (USA) 98%, Other 2%
• Latest funding: October 2023
• Founded year: 2009
• Headcount: 51-200
• LinkedIn: greenskies-clean-energy

Greenskies Clean Focus is a solar energy provider based in North Haven, Connecticut, specializing in renewable energy solutions tailored for municipalities, schools, nonprofits, and commercial entities. Since its inception in 2009, the company has focused on creating long-term partnerships with clients, offering a comprehensive suite of services that includes project financing, operations and maintenance, and solar installations. Greenskies aims to help clients reduce energy costs and carbon footprints without requiring upfront investments. The company has successfully developed and constructed over 320 MW of renewable energy facilities across more than 600 sites in 19 states, demonstrating its operational capacity and commitment to sustainability. Greenskies is recognized as the number one commercial solar developer in the Northeast and ranks among the top three in the U.S. based on cumulative kW installed, highlighting its significant role in the solar energy sector.

2. GameChange Solar

• Website: gamechangesolar.com
• Ownership type: Private
• Headquarters: Norwalk, Connecticut, United States (USA)
• Employee distribution: United States (USA) 53%, India 26%, South Africa 4%, Other 17%
• Latest funding: $150.0M, December 2021
• Founded year: 2012
• Headcount: 201-500
• LinkedIn: gamechange-solar

GameChange Solar, based in Norwalk, Connecticut, is a private company that has been active in the solar energy sector since its founding in 2012. The company focuses on developing innovative solar tracking systems and mounting solutions, which are essential for maximizing the efficiency and affordability of solar energy installations. Their flagship products include the Genius Tracker™ and MaxSpan™, which cater to a wide range of solar projects. GameChange Solar serves a global clientele, providing technology that helps optimize solar energy production. The company has made significant strides in the industry, recently surpassing 10 GW in awarded solar projects in India, showcasing its capability and market demand. With a workforce of over 400 employees and a presence in various countries, including India, South Africa, and the UAE, GameChange Solar is well-positioned to contribute to the ongoing transition to sustainable energy solutions. In December 2021, the company secured $150 million in funding, reflecting strong investor interest and support for its growth initiatives.

3. Empower Energy Solutions

• Website: empowerenergy.co
• Ownership type: Private
• Headquarters: Darien, Connecticut, United States (USA)
• Employee distribution: United States (USA) 84%, United Arab Emirates 5%, Pakistan 5%, Other 5%
• Founded year: 2013
• Headcount: 51-200
• LinkedIn: empower-energy-solutions-inc

Empower Energy Solutions, based in Darien, Connecticut, is a private solar energy provider that has been operational since 2013. The company specializes in offering a variety of solar energy solutions, including solar panel installations and financing options tailored for both residential and commercial customers. Empower Energy Solutions aims to help clients reduce their energy costs while promoting environmental sustainability through renewable energy initiatives. Their business model includes a comprehensive project workflow that covers consultation, design, installation, and activation, ensuring a seamless experience for customers. The company prides itself on using high-quality solar panels and providing excellent customer service, which is reflected in positive customer testimonials. Empower Energy Solutions is committed to creating a positive impact in the communities they serve, further enhancing their role in the solar energy sector.

4. CTEC Solar

• Website: ctecsolar.com
• Ownership type: Private
• Headquarters: Windsor, Connecticut, United States (USA)
• Employee distribution: United States (USA) 94%, Germany 6%
• Founded year: 2010
• Headcount: 51-200
• LinkedIn: c-tec-solar-llc-

CTEC Solar, based in Windsor, Connecticut, is a private solar energy company that specializes in renewable energy solutions, including solar project development and energy storage. Established in 2010, CTEC Solar has built a reputation for delivering comprehensive services that range from engineering and construction to operations and maintenance. The company serves utilities, solar developers, and property owners, focusing on cost-effective and sustainable energy solutions. With a portfolio that includes over 100 MW of solar and battery storage projects, CTEC Solar has demonstrated its capability in managing projects from inception to completion. Their team consists of industry experts who are well-versed in local policies and interconnection rules, allowing them to identify and develop attractive sites for utility-scale and community solar projects. CTEC Solar is committed to fostering long-term community partnerships and ensuring that local residents benefit from the economic opportunities created by their projects.

5. EcoSmart Home Services

• Website: ecosmartct.com
• Ownership type: Private
• Headquarters: Berlin, Connecticut, United States (USA)
• Employee distribution: United States (USA) 100%
• Founded year: 1985
• Headcount: 11-50
• LinkedIn: ecosmart-home-services

EcoSmart Home Services, established in 1985, is a private home improvement company based in Berlin, Connecticut. The firm specializes in energy efficiency solutions, offering a range of services that include solar panel installations, energy audits, HVAC systems, insulation, and electrical work. With a dedicated team of professionals, EcoSmart aims to help homeowners reduce energy costs and enhance comfort through sustainable practices. Their solar services are designed to harness clean energy, making them a significant player in the local solar market. The company emphasizes a customer-centric approach, focusing on education and informed decision-making regarding energy use. EcoSmart has built a reputation for its commitment to eco-friendly practices and energy conservation, serving the Connecticut community with a comprehensive suite of home improvement solutions.

6. Prime Energy Solar

• Website: primeenergysolar.com
• Ownership type: Private
• Headquarters: Milford, Connecticut, United States (USA)
• Employee distribution: United States (USA) 93%, Pakistan 7%
• Founded year: 2018
• Headcount: 11-50
• LinkedIn: prime-energy-solar

Prime Energy Solar, based in Milford, Connecticut, is a private solar energy company founded in 2018. With a workforce of approximately 43 employees, the company specializes in solar panel installations for both residential and commercial clients. They also provide additional services such as HVAC and roofing, aiming to create a holistic approach to energy efficiency and sustainability. Prime Energy Solar emphasizes customer satisfaction and offers innovative financing solutions, including options with no upfront costs. Their mission is to transform homes into energy-efficient spaces, helping clients reduce their energy bills while contributing to a greener environment. The company has positioned itself as a knowledgeable partner in the solar industry, leveraging over 20 years of combined experience among its team members to guide customers through the installation process and available incentives. Their focus on quality service and support has garnered them a solid reputation in their local market.

7. Louth Callan Renewables

• Website: louthcallanrenewables.com
• Ownership type: Private
• Headquarters: Suffield, Connecticut, United States (USA)
• Employee distribution: United States (USA) 100%
• Founded year: 2018
• Headcount: 51-200
• LinkedIn: louth-callan-renewables

Louth Callan Renewables is a solar construction company based in Suffield, Connecticut, specializing in renewable energy projects. Established in 2018, the firm has grown to employ around 61 professionals and has successfully completed over 81 projects, installing more than 180 megawatts of solar capacity. The company offers a comprehensive suite of services, including preconstruction development, engineering procurement construction (EPC), energy storage solutions, and ongoing operations and maintenance. Their clientele includes businesses, schools, and municipalities, reflecting their commitment to facilitating solar energy adoption across various sectors. Louth Callan Renewables prides itself on its rigorous safety standards and quality assurance, employing certified professionals to oversee project execution. Their focus on transparency and customer satisfaction positions them as a reliable partner in the solar energy industry.

8. Ion Solar Pros

• Website: ionsolarpros.com
• Ownership type: Private
• Headquarters: Middlebury, Connecticut, United States (USA)
• Employee distribution: United States (USA) 100%
• Founded year: 2019
• Headcount: 11-50
• LinkedIn: ion-solar-pros

Ion Solar Pros, based in Middlebury, Connecticut, is a private solar energy provider that specializes in solar energy systems, battery storage, and electric vehicle (EV) charging solutions. Founded in 2019, the company caters to both homeowners and businesses looking to reduce energy costs and enhance sustainability. With a team of 11-50 employees, Ion Solar Pros focuses on delivering expert installation and customer support, ensuring a smooth transition to solar energy. They operate primarily in Connecticut, where they have built a reputation for quality and reliability. The company offers a range of products, including high-efficiency solar panels and innovative energy storage solutions, designed to maximize energy production and savings for their clients. Their commitment to customer satisfaction is reflected in their positive reviews and industry certifications, positioning them as a noteworthy player in the solar energy sector.

9. Everlast Energy

• Website: everlastenergyct.com
• Ownership type: Private
• Headquarters: Manchester, Connecticut, United States (USA)
• Employee distribution: United States (USA) 100%
• Founded year: 2022
• Headcount: 11-50
• LinkedIn: everlast-energy

Everlast Energy, based in Manchester, Connecticut, is a solar energy company that specializes in providing renewable energy solutions tailored for residential and commercial customers. Founded in 2022, the company has quickly established itself in the solar market, focusing on solar panel installations and energy storage solutions. With a team that boasts over 30 years of collective experience in the solar industry, Everlast Energy aims to educate clients about their options and help them transition to solar energy. They operate primarily in Connecticut, Massachusetts, and Rhode Island, emphasizing a personal touch in their service delivery. The company also offers a veteran's discount, showcasing their commitment to community support. Their interactive tools, such as a solar estimator, further enhance customer engagement, allowing potential clients to visualize their solar solutions. Everlast Energy's approach combines technical expertise with a strong focus on customer service, positioning them as a noteworthy player in the solar energy sector.

10. Verogy

• Website: verogy.com
• Ownership type: Private
• Headquarters: West Hartford, Connecticut, United States (USA)
• Employee distribution: United States (USA) 100%
• Latest funding: Other (Debt), April 2022
• Founded year: 2017
• Headcount: 11-50
• LinkedIn: verogy

Verogy is a solar energy company based in West Hartford, Connecticut, founded in 2017. The firm specializes in renewable energy solutions, offering services that include project development, turnkey engineering, procurement, and construction (EPC), as well as solar financing. Verogy aims to assist businesses, municipalities, and organizations in transitioning to solar power, focusing on reducing energy costs and enhancing environmental sustainability. With a team that boasts over 75 years of combined experience in the solar industry, Verogy has developed a solid portfolio of projects across the United States. They are particularly active in the northeastern states, providing tailored solar solutions that address local energy needs and incentives. Their approach emphasizes a hands-on partnership with clients, ensuring that each project is managed from conception through to operation and maintenance.

11. Lodestar Energy

• Website: lodestarenergy.com
• Ownership type: Private
• Headquarters: Avon, Connecticut, United States (USA)
• Employee distribution: United States (USA) 100%
• Founded year: 2014
• Headcount: 11-50
• LinkedIn: lodestar-energy

Lodestar Energy, based in Avon, Connecticut, is a private solar energy developer that specializes in renewable energy solutions. Founded in 2014, the company has built a reputation for partnering with landowners, municipalities, and housing authorities to develop solar projects that yield energy savings and lower CO2 emissions. With a strong emphasis on sustainable development, Lodestar has successfully completed numerous projects across the Northeast, showcasing their ability to transform various types of land, including brownfields and vacant farmland, into productive solar facilities. Their portfolio includes nearly 130 MW of installed solar capacity, with an additional 100 MW in development. Lodestar's commitment to community engagement and environmental stewardship is evident in their project selection and execution, making them a notable entity in the solar energy industry.

12. SunEnergy1

• Website: sunenergy1.com
• Ownership type: Venture Capital
• Headquarters: Stamford, Connecticut, United States (USA)
• Employee distribution: United States (USA) 100%
• Latest funding: December 2024
• Founded year: 2009
• Headcount: 201-500
• LinkedIn: sunenergy1

SunEnergy1 is a solar energy developer based in Stamford, Connecticut, specializing in commercial solar project development. Since its inception in 2009, the company has focused on providing comprehensive services that include engineering, procurement, construction, and operations for solar facilities. With a workforce of approximately 133 employees, SunEnergy1 has successfully constructed over 1 GW of solar projects and boasts a substantial pipeline of 14 GW ready for development. Their business model is vertically integrated, allowing them to control all stages of solar projects, from land acquisition to maintenance. This approach not only enhances their operational efficiency but also positions them as a reliable partner for corporate and institutional clients seeking sustainable energy solutions. SunEnergy1 is also committed to community engagement, having donated over $5 million to various causes, which underscores their dedication to social responsibility in addition to their business objectives.

13. Savkat INC

• Website: savkat.com
• Ownership type: Family Owned
• Headquarters: Bristol, Connecticut, United States (USA)
• Employee distribution: United States (USA) 100%
• Founded year: 1985
• Headcount: 51-200
• LinkedIn: savkatinc

Savkat INC, based in Bristol, Connecticut, is a family-owned solar energy provider that has been in operation since 1985. The company specializes in residential solar energy systems, offering a full suite of services that includes installation, maintenance, and support. Savkat's product lineup features high-quality solar panels, energy storage solutions, and electric vehicle (EV) charging systems, catering primarily to homeowners looking to reduce energy costs and enhance their energy independence. The company prides itself on managing the entire installation process in-house, ensuring that customers receive consistent quality and support throughout their solar journey. With a focus on customer service and satisfaction, Savkat has established itself as a trusted name in the solar industry, serving customers across multiple states in New England. Their commitment to using premium products and providing comprehensive warranties further solidifies their position in the market.

14. Green Earth Energy Photovoltaic

• Website: geepv.com
• Ownership type: Private
• Headquarters: East Windsor, Connecticut, United States (USA)
• Employee distribution: United States (USA) 100%
• Founded year: 2007
• Headcount: 51-200
• LinkedIn: green-earth-energy-photovoltaic

Green Earth Energy Photovoltaic, founded in 2007, is a Connecticut-based company specializing in solar energy solutions. The firm focuses on the installation of solar panels and energy efficiency measures for both residential and commercial customers across New England. With a team that boasts over 140 years of combined experience in electrical engineering and construction, Green Earth Energy manages the entire installation process in-house, ensuring quality and reliability. They offer flexible financing options to make solar energy more accessible and work closely with local energy authorities to maximize state and federal incentives for their clients. The company has been recognized with multiple Pacesetter Awards, highlighting its performance and commitment to advancing sustainable energy solutions. Green Earth Energy also provides energy efficiency upgrades, further supporting their mission to reduce operational costs and promote environmental responsibility.

15. Telyon

• Website: telyon.com
• Ownership type: Private
• Headquarters: Old Saybrook, Connecticut, United States (USA)
• Employee distribution: United States (USA) 100%
• Latest funding: August 2023
• Founded year: 2017
• Headcount: 11-50
• LinkedIn: teloscompanies

Telyon, based in Old Saybrook, Connecticut, is a private renewable energy company founded in 2017. With a team of 35 employees, Telyon specializes in solar energy solutions, offering services that include project development, execution, and asset management. The company aims to assist businesses in adopting sustainable energy practices and achieving their corporate social responsibility goals. Telyon has established a strategic partnership with Greenbacker Capital, which allows them to provide comprehensive solutions for complex solar projects. Their leadership team consists of seasoned professionals with extensive experience in the renewable energy sector, having previously contributed to the growth of Greenskies Renewable Energy. Telyon is dedicated to addressing climate change through innovative solar solutions tailored for commercial clients across the United States.

16. Apollo Solar

• Website: apollosolar.com
• Ownership type: Private
• Headquarters: Bethel, Connecticut, United States (USA)
• Founded year: 2003
• Headcount: 11-50
• LinkedIn: apollo-solar

Apollo Solar, founded in 2003 and based in Bethel, Connecticut, is a private company that specializes in energy solutions with a focus on solar power systems. They manufacture a range of products, including solar charge controllers and inverters, primarily aimed at remote telecom and off-grid applications. Their offerings are designed to meet the unique challenges faced by telecommunications companies operating in difficult environments, ensuring reliable energy supply where conventional sources may fail. Apollo Solar's products are recognized for their efficiency and reliability, making them a preferred choice for organizations that require robust energy solutions. The company also emphasizes reducing operational costs and enhancing energy efficiency, which is critical in today's energy-conscious market.

17. Earthlight Technologies

• Website: earthlighttech.com
• Ownership type: Family Owned
• Headquarters: Ellington, Connecticut, United States (USA)
• Employee distribution: United States (USA) 100%
• Founded year: 2008
• Headcount: 51-200
• LinkedIn: earthlight-technologies

Earthlight Technologies, based in Ellington, Connecticut, is a family-owned solar energy company that has been operational since 2008. The firm specializes in providing comprehensive solar solutions and energy efficiency services tailored for both residential and commercial customers. Their service portfolio includes solar panel installations, energy storage systems, and electric vehicle (EV) charging stations. Earthlight Technologies is dedicated to helping clients reduce their energy costs while promoting sustainable energy practices. With a workforce of approximately 91 employees, the company has expanded its reach to multiple states, including Massachusetts and Oregon, showcasing its ability to adapt to different regional markets. Their focus on customer service and ongoing support post-installation further enhances their reputation in the solar industry.

18. Centurion Solar Energy, LLC

• Website: centurionsolar.com
• Ownership type: Private
• Headquarters: Stamford, Connecticut, United States (USA)
• Employee distribution: United States (USA) 79%, Mexico 21%
• Founded year: 2012
• Headcount: 11-50
• LinkedIn: centurion-solar-energy

Centurion Solar Energy, LLC, based in Stamford, Connecticut, is a solar installation company that specializes in renewable energy solutions. Founded in 2012, the company has grown to employ between 11 and 50 individuals, with a significant portion of its workforce based in the United States. Centurion Solar provides a range of services, including solar system design, installation, financing, and permitting assistance. They cater to both solar dealers and homeowners, facilitating a smooth transition to solar energy. The company has successfully installed over 10,000 solar systems, primarily on the East Coast, and has garnered recognition for its quality of service, achieving NYSERDA Quality Platinum Status in 2024. This accolade follows six consecutive years of Gold Status, underscoring their commitment to excellence in solar installations. Centurion Solar's expertise extends to managing complex permitting processes and providing comprehensive financing options, making them a trusted partner in the solar energy sector.

19. Ross Solar, a ConEdison Solutions Company

• Website: rosssolar.com
• Ownership type: Private
• Headquarters: Brookfield, Connecticut, United States (USA)
• Founded year: 2007
• Headcount: 11-50
• LinkedIn: ross-solar-group

Ross Solar, a ConEdison Solutions Company, is a renewable energy provider based in Brookfield, Connecticut. Founded in 2007, the company specializes in solar energy solutions, catering to a variety of clients, including government agencies, educational institutions, and commercial businesses. Ross Solar focuses on helping its clients achieve energy efficiency and sustainability goals through innovative energy management and financing options. The company is part of ConEdison Solutions, which enhances its capabilities in delivering comprehensive energy solutions. Ross Solar's projects often include residential, commercial, and community solar initiatives, reflecting its commitment to expanding access to clean energy. With a dedicated team of professionals, Ross Solar aims to contribute to a more sustainable energy future.

Solar Energy Insights: Key Companies in Connecticut

Company	Headquarter	Size	Founded	Ownership
Greenskies Clean Focus	North Haven, Connecticut, United States (USA)	51-200	2009	Private Equity
GameChange Solar	Norwalk, Connecticut, United States (USA)	201-500	2012	Private
Empower Energy Solutions	Darien, Connecticut, United States (USA)	51-200	2013	Private
CTEC Solar	Windsor, Connecticut, United States (USA)	51-200	2010	Private
EcoSmart Home Services	Berlin, Connecticut, United States (USA)	11-50	1985	Private
Prime Energy Solar	Milford, Connecticut, United States (USA)	11-50	2018	Private
Louth Callan Renewables	Suffield, Connecticut, United States (USA)	51-200	2018	Private
Ion Solar Pros	Middlebury, Connecticut, United States (USA)	11-50	2019	Private
Everlast Energy	Manchester, Connecticut, United States (USA)	11-50	2022	Private
Verogy	West Hartford, Connecticut, United States (USA)	11-50	2017	Private
Lodestar Energy	Avon, Connecticut, United States (USA)	11-50	2014	Private
SunEnergy1	Stamford, Connecticut, United States (USA)	201-500	2009	Venture Capital
Savkat INC	Bristol, Connecticut, United States (USA)	51-200	1985	Family Owned
Green Earth Energy Photovoltaic	East Windsor, Connecticut, United States (USA)	51-200	2007	Private
Telyon	Old Saybrook, Connecticut, United States (USA)	11-50	2017	Private
Apollo Solar	Bethel, Connecticut, United States (USA)	11-50	2003	Private
Earthlight Technologies	Ellington, Connecticut, United States (USA)	51-200	2008	Family Owned
Centurion Solar Energy, LLC	Stamford, Connecticut, United States (USA)	11-50	2012	Private
Ross Solar, a ConEdison Solutions Company	Brookfield, Connecticut, United States (USA)	11-50	2007	Private

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