Solar energy industry, with its abundant and sustainable energy solutions is widely expanding in Massachusetts. The companies operating in this sector offer a wide range of services including development of renewable energy assets, power purchase agreements, energy efficiency upgrades, and more. Committed to supporting a transition towards a carbon-free future, these companies not only ensure substantial savings on electricity costs but also significantly contribute to environmental conservation.


Top 21 solar power companies in Massachusetts

1. Ameresco

  • Website: ameresco.com
  • Headquarters: Framingham, Massachusetts, United States
  • Founded: 2000
  • Headcount: 1001-5000
  • Latest funding type: Post Ipo Debt
  • LinkedIn

Ameresco is a leading cleantech integrator and renewable energy asset developer, offering comprehensive energy efficiency, infrastructure upgrades, and renewable energy solutions in North America and Europe.


2. Enel North America

Enel North America is an energy company that offers sustainable and clean electricity solutions. They provide integrated energy solutions and partnerships to support a transition to a carbon-free future.


3. Nexamp

  • Website: nexamp.com
  • Headquarters: Boston, Massachusetts, United States
  • Founded: 2007
  • Headcount: 201-500
  • Latest funding type: Private Equity
  • LinkedIn

Nexamp is a clean energy company that offers solar power solutions to help businesses and communities reduce their electricity costs and embrace sustainable energy. They provide power purchase agreements and help with the development and maintenance of solar farms. By supporting solar energy, customers can save 10-20% on their annual electricity costs.


4. Commonwealth Fusion Systems

  • Website: cfs.energy
  • Headquarters: Cambridge, Massachusetts, United States
  • Founded: 2018
  • Headcount: 51-200
  • Latest funding type: Series B
  • LinkedIn

Commonwealth Fusion Systems (CFS) is a company dedicated to the development and commercialization of clean, fusion energy. Combining worldwide research in fusion science with high temperature superconductors, CFS aims to build smaller and more cost-effective tokamak fusion systems. Their goal is to create the world's first net energy-producing fusion machine, paving the way for a commercially viable fusion power plant and combatting climate change.


5. Yaskawa Solectria Solar

  • Website: solectria.com
  • Headquarters: Lawrence, Massachusetts, United States
  • Founded: 1915
  • Headcount: 201-500
  • LinkedIn

Solectria Renewables is a company that specializes in renewable energy solutions. They offer a range of inverters and power electronics for solar energy systems. With a focus on sustainability and efficiency, Solectria Renewables delivers high-quality products that help customers harness the power of the sun.


6. Boundless, Inc.

Boundless Inc. is a residential solar company that offers solar panel installation services. They help homeowners upgrade to solar power, providing savings on electricity bills and increasing home value. With expertise in solar energy and a commitment to the environment, Boundless Inc. aims to make solar energy accessible and affordable for homeowners across the country.


7. Boston Solar

  • Website: bostonsolar.us
  • Headquarters: Woburn, Massachusetts, United States
  • Founded: 2011
  • Headcount: 51-200
  • Latest funding type: Acquired
  • LinkedIn

Boston Solar is a company that offers residential and commercial solar energy solutions in Massachusetts. They provide solar installations, financing options, and assistance with tax credits. Boston Solar is known for its quality customer experience and top-quality components. They are a locally owned and operated company with a mission to help customers save money and reduce their carbon footprint.


8. Malta Inc

  • Website: maltainc.com
  • Headquarters: Cambridge, Massachusetts, United States
  • Founded: 2018
  • Headcount: 11-50
  • Latest funding type: Series B
  • LinkedIn

Malta Inc. offers breakthrough long duration energy storage technology that accelerates the decarbonization of the grid and economy. Their energy storage plants can repurpose fossil fuel plants, reducing carbon emissions and bringing down annual carbon dioxide emissions. They prioritize sustainability and resource efficiency in their supply chains.


9. FirstLight Power

FirstLight Power is a leading clean power producer, developer, and energy storage company serving North America. With a diversified portfolio of renewable energy and energy storage technologies, they specialize in hybrid solutions that pair hydroelectric, pumped-hydro storage, utility-scale solar, large-scale battery, and offshore wind assets. Their mission is to accelerate the decarbonization of the electric grid and deliver a clean, reliable, affordable, and equitable electric system.


10. Solstice

  • Website: solstice.us
  • Headquarters: Cambridge, Massachusetts, United States
  • Founded: 2014
  • Headcount: 11-50
  • Latest funding type: Acquired
  • LinkedIn

Solstice Platform is a company that focuses on community solar and aims to make renewable energy accessible to all.


11. ECA Solar

  • Website: ecasolar.com
  • Headquarters: Waltham, Massachusetts, United States
  • Founded: 2014
  • Headcount: 11-50
  • LinkedIn

ECA Solar develops, designs, and constructs renewable energy systems, including ground mounted solar PV systems, rooftop solar projects, and energy storage systems. They prioritize safety, follow local and state guidelines, and ensure ethically installed projects. ECA values diversity and creativity, aiming to make solar energy accessible to everyone.


12. Beacon Solar

Beacon Solar Construction is a leading solar energy company based in Massachusetts, Rhode Island, and Southern Connecticut. They offer design consultations, troubleshooting, installation estimates, and other services related to solar power. With a focus on customer satisfaction, they provide Qmerit certified solutions and collaborate with contractors and consumers to accelerate the transition to electrification. Beacon Solar Construction is experienced in residential and commercial solar projects, as well as battery and energy storage solutions.


13. Smartflower

Smartflower is revolutionizing the clean energy industry with innovative solar solutions for discerning homeowners and businesses. Their sculptural and intelligent solar panels make a beautiful, statement-making addition to any space. With their fully-integrated systems and efficient EV chargers, customers can enjoy clean energy at any time. Smartflower offers delivery, installation, and servicing by certified technicians, ensuring a hassle-free experience. They also provide a Smartflower + Plus battery option for added power storage. Join the clean energy revolution with Smartflower.


14. Pacifico Energy Group

Pacifico Energy is a renewable power company specializing in solar photovoltaic and wind projects with over 1.5GW of operational projects and an additional 7GW in development.


15. Relay Power

  • Website: relaypower.com
  • Headquarters: Hudson, Massachusetts, United States
  • Founded: 2016
  • Headcount: 11-50
  • LinkedIn

RelayPower is a company that helps individuals and businesses find programs and incentives for clean and renewable energy solutions. They provide recommendations based on home and situation to maximize savings and reduce carbon footprint.


16. One Earth Designs

One Earth Designs is a company that offers solar cooking solutions with the aim of promoting sustainable living and reducing fuel consumption.


17. Isaksen Solar

Isaksen Solar is a trusted, locally-owned solar company in Massachusetts offering home and commercial solar panel installation as well as community solar options. Our expert team helps homeowners and business owners save money on electricity bills by providing a free consultation and honest solar panel quotes to make the best decision for their energy needs.


18. Mass No Cost Solar

Mass No-Cost Solar is a turn-key program that helps Massachusetts homeowners to get solar installed with no upfront cost and no additional out-of-pocket expenses for coverage, maintenance, or equipment repairs and replacements.


19. SolarFi - connected to the world

  • Website: solar-fi.com
  • Headquarters: Boston, Massachusetts, United States
  • Headcount: 11-50
  • Latest funding type: Pre Seed
  • LinkedIn

SolarFi is an impact-driven company providing sustainable solutions to emergency response and hospitality services. They aim to be a part of the global effort to adopt solar power as a means of transforming cities and businesses.


20. GreenFuel

  • Website: greenfuelonline.com
  • Headquarters: Cambridge, Massachusetts, United States
  • Founded: 2002
  • Headcount: 11-50

Green Fuel Online is a platform that provides resources, online courses and supplies for individuals and companies interested in renewable energy sources.


21. Dalkia Energy Solutions

Dalkia Solutions is a US-based building energy efficiency business, providing a comprehensive range of energy services to commercial and industrial companies nationwide. With expertise in energy management, the company helps enterprises reduce energy consumption, improve environmental performance, and achieve positive business outcomes.


Want to find more solar power companies?


If you want to find more companies that offer solutions like energy efficiency upgrades, renewable energy asset development and power purchase agreements 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!