Expanding rapidly, the solar energy industry in Connecticut comprises a dynamic mix of companies. From firms delivering comprehensive decarbonization solutions to those innovating in solar equipment design, their offerings help commercial, private, and public entities maximize solar power utilization and align with a more sustainable future. As we observe a societal shift towards renewable energy, Connecticut's diverse solar sector is a microcosm of this evolution, showcasing inventive products, cutting-edge technologies, and unwavering dedication toward environmental responsibility.


Top 19 solar energy companies in Connecticut

1. GameChange Solar

  • Website: gamechangesolar.com
  • Headquarters: Norwalk, Connecticut, United States
  • Founded: 2012
  • Headcount: 51-200
  • Latest funding type: Series Unknown
  • LinkedIn

GameChange Solar is a company that is changing the world by making solar energy affordable. They offer innovative solar racking systems and solutions to maximize solar energy production.


2. Specialized Technology Resources, Inc.

  • Website: strsolar.com
  • Headquarters: Enfield, Connecticut, United States
  • Founded: 1944
  • Headcount: 201-500
  • Latest funding type: Ipo
  • LinkedIn

STR Holdings, Inc. is a global leader in solar panel encapsulation, offering environmentally-responsible solutions through research and innovation.


3. Greenskies Clean Focus

  • Website: greenskies.com
  • Headquarters: North Haven, Connecticut, United States
  • Founded: 2009
  • Headcount: 51-200
  • Latest funding type: Acquired
  • LinkedIn

Greenskies is a vertically-integrated solar energy company offering decarbonization solutions like onsite and offsite solar, battery storage, microgrids, and CCHP. They are dedicated to quality and operational excellence and work with commercial, public sector, and utility energy users throughout the US. With a single delivery team, Greenskies originates, develops, constructs, and operates renewable energy facilities.


4. Louth Callan Renewables

Louth Callan Renewables develops, constructs, and maintains clean, renewable-energy projects in the United States, specializing in solar solutions. They offer workmanship warranties and operations and management agreements to ensure optimal functioning of the systems. LCR procures top-level equipment manufacturers and investment-grade panels for their projects.


5. Altus Power, Inc.

  • Website: altuspower.com
  • Headquarters: Stamford, Connecticut, United States
  • Founded: 2009
  • Headcount: 51-200
  • Latest funding type: Post Ipo Debt
  • LinkedIn

Altus Power offers locally-sited solar generation, energy storage, and EV-charging stations to customers across the U.S. Find savings and reliable renewable energy for commercial, industrial, public sector, and Community Solar customers.


6. Greenworks Lending from Nuveen

  • Website: greenworkslending.com
  • Headquarters: Darien, Connecticut, United States
  • Founded: 2015
  • Headcount: 51-200
  • Latest funding type: Acquired
  • LinkedIn

Greenworks Lending is a company that offers financing solutions for energy efficiency projects. They specialize in C-PACE (Commercial Property Assessed Clean Energy) financing, which allows property owners to fund upgrades and improvements with no upfront costs. Their services include project types such as new construction, gut rehabs, energy efficient upgrades, solar and renewables, and recapitalization for recently completed projects. They also provide resources like case studies, available states, and FAQs. Greenworks Lending aims to make the world greener by providing loans for sustainable projects.


7. CTEC Solar

  • Website: ctecsolar.com
  • Headquarters: Windsor, Connecticut, United States
  • Founded: 2010
  • Headcount: 51-200
  • LinkedIn

CTEC Solar is a company that specializes in the development and installation of utility-scale solar projects in the Northeast. They offer a range of solutions for commercial and residential customers, including solar farms, rooftops, carports, and residential homes.


8. Green Street Power Partners

  • Website: gspp.com
  • Headquarters: Stamford, Connecticut, United States
  • Founded: 2000
  • Headcount: 11-50
  • LinkedIn

Green Street Power Partners (GSPP) is a company that focuses on acquiring, financing, and developing solar energy systems across the nation. They offer community solar solutions and aim to power tomorrow with clean and sustainable energy.


9. Elite Energy Consulting

Elite Solar Pros is a company that provides solar panel installations and services. They offer low-cost home solar panels with installation in Connecticut and beyond. Their mission is to promote the use of solar energy and help homeowners save money by converting to solar power.


10. Ion Solar Pros

Ion Solar Pros is a solar energy solutions provider that helps customers produce, store, and generate revenue for years to come. They offer customized solar systems for residential and commercial properties, along with end-to-end support. The company's goal is to provide customers with sustainable power and significant savings.


11. EcoSmart Home Services

  • Website: ecosmartct.com
  • Headquarters: East Berlin, Connecticut, United States
  • Founded: 1985
  • Headcount: 11-50
  • LinkedIn

EcoSmart is a Connecticut-based company that specializes in providing holistic solutions for homeowners to improve energy efficiency, reduce fossil fuel usage, and achieve energy independence. They offer services such as solar panel installation, home batteries, generators, roofing, and home energy audits. With the Inflation Reduction Act, solar ownership combined with incentives can offer a return on investment of 10 years or less for eligible homeowners. EcoSmart is committed to helping customers save money, reduce their environmental impact, and create a more comfortable living environment.


12. Savkat INC

  • Website: savkat.com
  • Headquarters: Bristol, Connecticut, United States
  • Founded: 1985
  • Headcount: 11-50
  • LinkedIn

SAVKAT is a solar energy provider that offers top quality products and services. They specialize in home solar systems and provide a comprehensive warranty that covers the entire system. SAVKAT is committed to customer satisfaction and offers financing options for convenience.


13. Prime Energy Solar

Prime Energy Solar offers renewable energy solutions including solar installations, repairs, and roof installations to create sustainable energy and save on repairs.


14. PurePoint Energy

PurePoint Energy is a solar energy company that specializes in providing superior, customized solar energy installations and energy storage solutions for agricultural properties, commercial properties, and non-profits. They offer free consultations and support post-installation, serving clients nationwide in the United States. Whether for apartment buildings, warehouses, schools, or non-profit facilities, PurePoint Energy helps businesses get started with solar panels and offers grants for nonprofit organizations.


15. Apollo Solar

Apollo Solar offers power generation equipment for remote telecom sites, providing pure solar and hybrid configurations that enable telecommunications companies to deliver services in challenging locations. Their off-grid systems increase reliability and reduce power costs. They specialize in telecom power products, including solar controllers, inverters, and pre-wired panels. Apollo Solar's solutions have proven reliability in challenging environments such as jungles, deserts, mountains, and coastlines. They also offer remote monitoring for minimal downtime. Their goal is to achieve maximum reliability and efficiency while reducing operational expenses and CO2 emissions.


16. Ross Solar, a ConEdison Solutions Company

  • Website: rosssolar.com
  • Headquarters: Brookfield, Connecticut, United States
  • Founded: 2007
  • Headcount: 11-50
  • LinkedIn

Con Edison Solutions is a company that specializes in custom solar power systems for homes and businesses in the northeastern region. They have extensive knowledge of the local climate, incentive programs, utility requirements, and building regulations. With an in-house design team and experienced installers, they provide affordable and tailored solar solutions. Their expertise, integrity, and financial stability set them apart in the industry.


17. Renewable Energy CT

Renewable Energy CT specializes in the installation and repair of solar energy systems for residential and commercial properties in Guilford, Connecticut. They offer a range of services including solar panel installation, solar power inverters, battery back up systems, and more.


18. Aegis Solar Energy Inc.

Aegis Solar Energy is a solar energy provider for residential and commercial properties in Connecticut. They offer solar electric, hot water, and pool heating solutions with a focus on guaranteed solar production.


19. Smart Roofs CT

Smart Roofs Solar is a commercial solar company that offers energy solutions to help businesses reduce their monthly electricity costs and create more predictability with their expenses. They provide guidance on utilizing State and Federal incentives for solar energy, and focus on delivering outstanding long-term returns for businesses.


Want to find more solar energy companies?


If you want to find more companies that provide an array of advanced solar solutions and technologies 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!