The electric power industry in Massachusetts is characterized by a mix of conventional and renewable energy sources. Companies here operate in areas such as generation, distribution, and services related to energy efficiency. This includes big players in solar, wind, biomass, and hydropower, reflecting a strong shift towards sustainability. As demand for cleaner energy rises, a movement toward innovative energy storage solutions and smart grid technology is increasing. Massachusetts is also notable for its ambitious renewable energy goals, aiming for a significant reduction in greenhouse gas emissions by 2050, which presents both challenges and opportunities for industry participants.

The companies highlighted in this list range in size and specialization, with most headquartered in convenient locations across Massachusetts. Founded from 1906 to 2022, these firms contribute to various energy sectors, including solar, hydropower, and energy storage. They feature a mix of private equity and venture capital ownership, reflecting a robust interest in clean energy solutions. This array of businesses, big and small, illustrates the dynamic landscape of Massachusetts's electric power scene, catering to both residential and commercial clients.

Continue reading to explore the top electric power companies in Massachusetts.

Top 22 Electric Power Companies in Massachusetts

1. Atlantic Power Corporation

• Website: atlanticpower.com
• Ownership type: Private Equity
• Headquarters: Dedham, Massachusetts, United States (USA)
• Latest funding: October 2023
• Founded year: 2004
• Headcount: 201-500
• LinkedIn: atlantic-power-corporation

Atlantic Power Corporation, based in Dedham, Massachusetts, is an independent power producer that owns and operates power generation assets across multiple states in the U.S. and provinces in Canada. Founded in 2004, the company has built a portfolio that includes projects utilizing various fuel types such as natural gas, hydro, and biomass. Atlantic Power primarily sells electricity and steam to investment-grade utilities and large customers under long-term contracts, ensuring a reliable energy supply. Approximately 80% of their projects are fully owned and operated by the company, reflecting their commitment to operational control and efficiency. The company was acquired by I Squared Capital in May 2021, which may provide additional resources and strategic direction for future growth. Atlantic Power's focus on minimizing exposure to commodity price fluctuations through contractual provisions and hedging strategies further underscores their proactive approach to risk management in the energy sector.

2. Nexamp

• Website: nexamp.com
• Ownership type: Venture Capital
• Headquarters: Boston, Massachusetts, United States (USA)
• Employee distribution: United States (USA) 99%, Other 1%
• Latest funding: Other (Debt), $340.0M, April 2025
• Founded year: 2007
• Headcount: 201-500
• LinkedIn: nexamp

Nexamp, founded in 2007 by two U.S. Army veterans, is a clean energy provider based in Boston, Massachusetts. The company specializes in solar energy and energy storage solutions, offering services such as community solar, energy storage, and power purchase agreements. Nexamp aims to democratize clean energy access, allowing residential consumers, businesses, and municipalities to save on energy costs while pursuing sustainability goals. With a workforce of over 500 employees, Nexamp has established itself as a significant player in the renewable energy sector. The company has received substantial funding, including a recent $340 million investment, which supports its growth and expansion in the clean energy market. Nexamp operates across the United States, developing, managing, and maintaining solar and energy storage assets, thereby contributing to the nation's energy independence and environmental sustainability.

3. EnergySage

• Website: energysage.com
• Ownership type: Corporate
• Headquarters: Boston, Massachusetts, United States (USA)
• Employee distribution: United States (USA) 88%, Serbia 12%
• Latest funding: February 2022
• Founded year: 2009
• Headcount: 51-200
• LinkedIn: energysage

EnergySage, founded in 2009 and based in Boston, Massachusetts, is a corporate entity with a workforce of approximately 135 employees. The company specializes in clean energy solutions, offering services that include solar energy installations, backup power systems, heating and cooling solutions, and electric vehicle charging infrastructure. EnergySage operates a marketplace that empowers homeowners and businesses to compare quotes and select suitable clean energy options tailored to their needs. They provide personalized support through their Energy Advisors, helping clients navigate the complexities of electrification and energy efficiency. The company has made significant strides in promoting solar energy, having facilitated the installation of solar panels that produce over 556 GWh of electricity annually, equivalent to the environmental impact of planting 135 million trees. EnergySage collaborates with various stakeholders, including utilities and trade organizations, to enhance access to clean energy solutions. Their commitment to making clean energy affordable and accessible is further underscored by their partnerships and the resources they provide to educate consumers about energy options.

4. Great River Hydro, LLC

• Website: greatriverhydro.com
• Ownership type: Corporate
• Headquarters: Westborough, Massachusetts, United States (USA)
• Employee distribution: United States (USA) 100%
• Latest funding: $2.0B, October 2022
• Founded year: 2017
• Headcount: 51-200
• LinkedIn: great-river-hydro-llc

Great River Hydro, LLC, based in Westborough, Massachusetts, is a hydropower generator that operates primarily in New England. Established in 2017, the company has quickly positioned itself as the largest conventional hydropower producer in the region. With 13 hydroelectric generating stations and three storage-only reservoirs, Great River Hydro has a total capacity of 589 megawatts, enough to supply electricity to over 200,000 homes annually. The company is dedicated to delivering reliable, carbon-free energy while actively engaging in community support and environmental stewardship. Great River Hydro's facilities have been part of the New England power grid for over a century, showcasing a long-standing commitment to sustainable energy production. The company also emphasizes its role in local economies, contributing significantly through property taxes and community initiatives. In 2022, Great River Hydro secured substantial funding, indicating strong investor confidence in its operations and future growth potential.

5. Advanced Energy Systems

• Website: matep.com
• Ownership type: Private
• Headquarters: Boston, Massachusetts, United States (USA)
• Founded year: 1906
• Headcount: 51-200
• LinkedIn: advanced-energy-systems

Advanced Energy Systems, operating under the name MATEP LLC, is a private energy provider based in Boston, Massachusetts. Founded in 1906, the company has a rich history of supplying steam, chilled water, and electricity primarily to the Longwood Medical and Academic Area, which includes prestigious institutions such as Harvard-affiliated hospitals and research centers. MATEP's facility is a combined heat and power (CHP) plant, which means it generates electricity and useful thermal energy simultaneously, enhancing efficiency and sustainability. The plant operates at 75 percent efficiency, significantly reducing fuel consumption and preventing substantial CO2 emissions. MATEP has received recognition for its environmental efforts, including an ENERGY STAR CHP Award from the U.S. Environmental Protection Agency. The company is currently managed by ENGIE North America and Axium Infrastructure, ensuring a focus on reliability and resilience in energy supply for critical healthcare operations.

6. Rexel Energy Solutions USA

• Website: rexelenergy.com
• Ownership type: Family Owned
• Headquarters: Taunton, Massachusetts, United States (USA)
• Employee distribution: United States (USA) 97%, Indonesia 3%
• Founded year: 1942
• Headcount: 51-200
• LinkedIn: rexel-energy-solutions-usa

Rexel Energy Solutions USA, based in Taunton, Massachusetts, is a family-owned energy solutions provider founded in 1942. The company specializes in energy optimization and electrification, offering a range of products and services that include lighting, EV charging stations, HVAC solutions, solar energy systems, and battery storage. They cater primarily to businesses in the energy sector, helping clients achieve energy efficiency and sustainability goals through tailored solutions. With a strong emphasis on customer support and project management, Rexel Energy Solutions positions itself as a partner in navigating the complexities of energy projects. Their extensive inventory and logistical capabilities allow them to meet the unique needs of various projects, ensuring timely delivery and installation support. The company has been involved in utility rebate programs for over 30 years, assisting clients in identifying advantageous programs and maximizing their energy savings.

7. Kraft Power Corporation

• Website: kraftpower.com
• Ownership type: Family Owned
• Headquarters: Woburn, Massachusetts, United States (USA)
• Employee distribution: United States (USA) 100%
• Founded year: 1965
• Headcount: 51-200
• LinkedIn: kraft-power

Kraft Power Corporation, based in Woburn, Massachusetts, is a family-owned power generation company that has been serving the industry since 1965. With a workforce of approximately 153 employees, Kraft Power specializes in delivering reliable power solutions and maintenance services. Their offerings include a wide range of products such as generators, marine services, and engine controls, catering to both businesses and consumers. The company operates with a service-oriented model, ensuring that customer needs are met with expert support. Kraft Power is also involved in innovative sectors like energy storage and electric vehicle charging, reflecting their adaptability to market trends. Their commitment to quality service is underscored by positive customer feedback, which emphasizes their responsiveness and technical expertise.

8. Comalli Group Inc.

• Website: comalli.com
• Ownership type: Private
• Headquarters: Pittsfield, Massachusetts, United States (USA)
• Employee distribution: United States (USA) 100%
• Founded year: 1981
• Headcount: 51-200
• LinkedIn: comalli-group-inc-

Comalli Group Inc., founded in 1981 and based in Pittsfield, Massachusetts, is an electrical services company that provides a wide array of solutions tailored to residential, commercial, and industrial clients. The company has built a strong presence primarily in Albany, NY, and surrounding areas, serving homeowners and businesses with reliable electrical solutions. Their service portfolio includes traditional electrical work such as installations, rewiring, and safety inspections, alongside modern energy services like solar panel installations and electric vehicle charging solutions. Comalli Group emphasizes energy efficiency and technology integration, showcasing their adaptability to evolving market demands. With a dedicated team of licensed electricians, the company prides itself on high-quality workmanship and customer satisfaction, which has helped them maintain a loyal customer base over the decades. Their commitment to innovation and service excellence positions them as a significant player in the electric power industry.

9. Form Energy

• Website: formenergy.com
• Ownership type: Private Equity
• Headquarters: Somerville, Massachusetts, United States (USA)
• Employee distribution: United States (USA) 100%
• Latest funding: Other (Debt), $50.0M, December 2024
• Founded year: 2017
• Headcount: 501-1000
• LinkedIn: form-energy

Form Energy is an energy storage technology and manufacturing company based in Somerville, Massachusetts. Founded in 2017, the company specializes in developing and commercializing iron-air batteries that can store electricity for up to 100 hours. This capability positions their technology as a cost-effective solution for utilities and energy providers looking to manage the variability of renewable energy sources. Form Energy's mission is to transform the electric grid into a more reliable and sustainable system, enabling year-round access to low-cost clean energy. The company has received significant funding, including a recent $405 million investment aimed at expanding its operations and battery technology. With facilities across the United States, Form Energy collaborates with various utilities to implement its innovative energy storage solutions, contributing to the ongoing evolution of the electric power sector.

10. Harvest Power, Inc.

• Website: harvestpower.com
• Ownership type: Venture Capital
• Headquarters: Waltham, Massachusetts, United States (USA)
• Employee distribution: United States (USA) 100%
• Latest funding: Series E-K, $20.0M, November 2015
• Founded year: 2008
• Headcount: 201-500
• LinkedIn: harvest-power-inc.

Harvest Power, Inc., based in Waltham, Massachusetts, is a solar energy provider that specializes in renewable energy solutions tailored for both residential and commercial clients. Founded in 2008, the company has established itself as a significant player in the solar market, particularly in New York State, where it has completed thousands of installations. Their offerings include solar panel installations, community solar options, and battery storage solutions, all aimed at helping customers reduce energy costs and transition to sustainable energy sources. Harvest Power has received substantial venture capital funding, totaling $20 million in its last funding round in November 2015, which underscores investor confidence in its business model and growth potential. The company prides itself on its customer service and commitment to safety, while also staying updated with the latest solar technology to enhance client satisfaction.

11. Agilitas Energy

• Website: agilitasenergy.com
• Ownership type: Private
• Headquarters: Wakefield, Massachusetts, United States (USA)
• Employee distribution: United States (USA) 100%
• Latest funding: Other (Debt), $100.0M, April 2024
• Founded year: 2014
• Headcount: 11-50
• LinkedIn: agilitas-energy-inc

Agilitas Energy, founded in 2014 and based in Wakefield, Massachusetts, is an energy solutions provider that focuses on renewable energy and energy storage systems. The company develops, builds, owns, and operates solar photovoltaic (PV) and hydropower projects, primarily serving utilities and municipalities. With a mission to accelerate the transition to clean energy, Agilitas Energy has established itself as a significant player in the energy storage market, particularly in the Northeast U.S. They have developed over 500 MW of solar PV and energy storage projects, showcasing their capability in managing the entire project lifecycle from inception to operation. Recently, Agilitas secured $100 million in funding to further expand its national renewables and energy storage platform. Their innovative approach includes constructing the largest non-wires solution energy storage system in Con Edison’s service area, highlighting their commitment to enhancing grid reliability and supporting sustainable energy solutions.

12. Fischbach & Moore Electric Group, LLC.

• Website: fbmpower.com
• Ownership type: Private
• Headquarters: Braintree, Massachusetts, United States (USA)
• Employee distribution: United States (USA) 100%
• Founded year: 1918
• Headcount: 51-200
• LinkedIn: fischbach-%26-moore-electric-group-llc.

Fischbach & Moore Electric Group, LLC, based in Braintree, Massachusetts, has been a significant player in the electrical contracting sector since its founding in 1918. The company specializes in heavy construction and industrial electrical services, providing a wide array of offerings that include clean energy solutions, emergency restoration, and substation construction. Fischbach & Moore serves a variety of clients, including municipalities and utility companies, ensuring the delivery of reliable electrical infrastructure and services. Their commitment to clean energy initiatives is evident in their work on photovoltaic systems and support for offshore wind projects. The company also emphasizes safety and efficiency in its operations, utilizing advanced technologies like Building Information Modeling (BIM) to enhance project execution. With a workforce of skilled professionals, Fischbach & Moore is well-equipped to handle complex electrical projects, making them a trusted partner in the industry.

13. Noresco

• Website: noresco.com
• Ownership type: Corporate
• Headquarters: Westborough, Massachusetts, United States (USA)
• Employee distribution: United States (USA) 99%
• Latest funding: December 2008
• Founded year: 1984
• Headcount: 201-500
• LinkedIn: noresco

Noresco, founded in 1984 and based in Westborough, Massachusetts, is a corporate entity that specializes in energy efficiency and sustainability solutions. The company provides a wide array of services, including performance contracting, renewable energy integration, and infrastructure design. They cater to various sectors such as government, education, and healthcare, focusing on customized solutions that help clients reduce operational costs and meet sustainability objectives. Noresco's expertise extends to energy audits, microgrid development, and water conservation, showcasing their commitment to comprehensive energy management. Their business model emphasizes delivering measurable results through innovative financing options, allowing clients to undertake significant infrastructure upgrades without upfront capital. With a workforce of over 500 employees, Noresco has established itself as a key player in the energy efficiency sector, contributing to the transition towards a more sustainable energy future.

14. Beacon Solar

• Website: beaconsolarma.com
• Ownership type: Corporate
• Headquarters: Taunton, Massachusetts, United States (USA)
• Employee distribution: United States (USA) 100%
• Latest funding: December 2021
• Founded year: 2007
• Headcount: 11-50
• LinkedIn: beacon-solar

Beacon Solar, founded in 2007 and based in Taunton, Massachusetts, is a solar energy company dedicated to providing comprehensive solar solutions. They serve residential and commercial customers primarily in Massachusetts, Rhode Island, and Connecticut. The company offers a full range of services, including solar panel installation, maintenance, and repair, aiming to help clients reduce their energy costs and environmental impact through renewable energy. Beacon Solar also provides electrification services, including battery storage solutions and electric vehicle chargers, further enhancing their offerings in the clean energy sector. Their commitment to quality is reflected in their extensive warranties and customer support, making them a trusted partner for solar energy needs in their operational regions.

15. RALCO Electric & Generator

• Website: ralcoelectric.com
• Ownership type: Private
• Headquarters: Westport, Massachusetts, United States (USA)
• Employee distribution: United States (USA) 100%
• Founded year: 1986
• Headcount: 51-200
• LinkedIn: ralco-electric-inc

RALCO Electric & Generator, based in Westport, Massachusetts, has been a trusted name in electrical contracting since its inception in 1986. The company specializes in a wide range of electrical services, catering to both residential and commercial clients. Their offerings include installations, repairs, and maintenance, with a particular emphasis on generator services. RALCO Electric prides itself on its commitment to safety, quality workmanship, and customer satisfaction. The company has built a strong reputation in the industry, recognized for its adherence to high standards and innovative practices. With a team of certified and licensed electricians, RALCO Electric ensures that each project is handled with expertise and care, contributing to the reliability of electrical systems in the communities they serve. Their involvement in various sectors, including healthcare and education, further underscores their capability and experience in managing complex electrical projects.

16. Malta Inc

• Website: maltainc.com
• Ownership type: Venture Capital
• Headquarters: Cambridge, Massachusetts, United States (USA)
• Employee distribution: United States (USA) 47%, Spain 27%, Italy 7%, Other 20%
• Latest funding: $21.6M, November 2023
• Founded year: 2018
• Headcount: 11-50
• LinkedIn: maltainc

Malta Inc., founded in 2018 and based in Cambridge, Massachusetts, is an energy storage company that specializes in long-duration energy storage solutions. The company focuses on innovative technologies that enable the integration of renewable energy sources and enhance grid stability. Malta Inc. serves a range of customers, including electric utilities and industrial users, who are seeking reliable energy storage options. Their Thermo-Electric Energy Storage system is designed to store energy from various power generation sources, making it a flexible solution for modern energy challenges. With a global operational footprint, Malta Inc. is committed to supporting sustainable energy transitions. The company recently secured over $21 million in funding, which will help accelerate the deployment of its energy storage technology and further its mission in the energy sector.

17. Dagle Electrical Construction Corp

• Website: deccorp.com
• Ownership type: Private
• Headquarters: Wilmington, Massachusetts, United States (USA)
• Employee distribution: United States (USA) 100%
• Founded year: 1997
• Headcount: 201-500
• LinkedIn: dagle-electrical-construction-corp

Dagle Electrical Construction Corp, established in 1997, is an electrical contractor based in Wilmington, Massachusetts. The company specializes in providing value-added electrical services across New England, focusing on electrical construction, maintenance, and alternative energy solutions. Their service offerings include heavy electrical construction, transportation infrastructure, and emergency standby systems. Dagle has made significant strides in the alternative energy sector, engaging in projects related to solar and wind energy, as well as energy efficiency initiatives. The firm has built a reputation for quality workmanship and a strong commitment to safety, ensuring that projects are executed efficiently and effectively. Dagle serves a mix of municipal and private sector clients, demonstrating their capability to handle a variety of projects, from street lighting to complex energy storage systems. Their extensive experience and client-focused approach have allowed them to establish lasting relationships within the industry.

18. Sunbug Solar

• Website: sunbugsolar.com
• Ownership type: Corporate
• Headquarters: Woburn, Massachusetts, United States (USA)
• Employee distribution: United States (USA) 100%
• Latest funding: December 2023
• Founded year: 2009
• Headcount: 51-200
• LinkedIn: sunbug-solar

Sunbug Solar, founded in 2009 and based in Woburn, Massachusetts, is a corporate entity dedicated to providing solar energy solutions. The company specializes in the installation, maintenance, and financing of solar electric systems for a variety of clients, including homeowners, businesses, and non-profit organizations. With a mission to promote sustainable energy practices, Sunbug Solar has successfully completed projects for over 2,800 customers. They are a certified B-Corp, reflecting their commitment to high social and environmental standards. In 2023, Sunbug Solar joined forces with ReVision Energy, enhancing their capacity to deliver quality solar products and services. Their approach includes a thorough assessment of customer needs, education on renewable energy options, and a focus on maximizing the economic benefits of solar energy. Sunbug Solar's involvement in the solar industry is marked by their dedication to empowering clients to reduce energy costs and environmental impact.

19. Actual Energy, Inc.

• Website: actualenergy.com
• Ownership type: Venture Capital
• Headquarters: Sandwich, Massachusetts, United States (USA)
• Employee distribution: United States (USA) 100%
• Latest funding: Seed, $1.1M, April 2022
• Founded year: 2020
• Headcount: 11-50
• LinkedIn: actual-energy-inc

Actual Energy, Inc., based in Sandwich, Massachusetts, is an energy provider that specializes in energy supply and management solutions tailored for commercial and industrial customers. Founded in 2020, the company aims to bring transparency to the energy procurement process, which is often complex and opaque. Their services include a direct-to-grid energy supply model, data visualization tools, and clean energy solutions. This model allows clients to pay only for the energy they use, when they use it, potentially leading to significant cost savings. Actual Energy is also committed to supporting the clean energy transition, providing clients with insights into their energy consumption and carbon emissions. The company has received seed funding, amounting to over $1 million, which underscores investor confidence in their business model and growth potential. They currently operate in the competitive markets of ISO-NE, covering states like Connecticut, Massachusetts, Maine, New Hampshire, and Rhode Island, with plans to expand further into New York and Pennsylvania.

20. New Leaf Energy, Inc.

• Website: newleafenergy.com
• Ownership type: Private Equity
• Headquarters: Lowell, Massachusetts, United States (USA)
• Employee distribution: United States (USA) 100%
• Latest funding: July 2022
• Founded year: 2022
• Headcount: 51-200
• LinkedIn: new-leaf-energy-inc

New Leaf Energy, Inc., based in Lowell, Massachusetts, is a renewable energy developer that specializes in solar development, energy storage, and wind generation. Established in 2022, the company emerged from the development arm of Borrego, a recognized player in the energy sector. With a focus on accelerating the transition to clean energy, New Leaf Energy has developed over 1 GW of renewable energy projects across various states, including California, New York, and Illinois. They work closely with landowners and stakeholders to implement sustainable energy solutions, ensuring that projects are not only viable but also beneficial to local communities. Their operations include site evaluations, project development, and construction management, all aimed at delivering reliable clean energy to the grid. New Leaf Energy's commitment to transparency and long-term partnerships with landowners highlights their strategic approach to renewable energy development.

21. Northern Energy Services, INC.

• Website: northernenergy.net
• Ownership type: Private
• Headquarters: Northborough, Massachusetts, United States (USA)
• Employee distribution: United States (USA) 100%
• Founded year: 1996
• Headcount: 11-50
• LinkedIn: northern-energy-services-inc.

Northern Energy Services, INC. is an energy management firm based in Northborough, Massachusetts, founded in 1996. The company offers a range of services aimed at enhancing energy efficiency and promoting renewable energy solutions. They cater to various sectors, including commercial, industrial, government, and educational institutions. Their approach involves conducting energy audits, implementing tailored solutions, and facilitating project financing to help clients reduce energy costs and improve system performance. Over the years, Northern Energy Services has partnered with major utility companies like National Grid and Eversource, providing turn-key energy efficiency services that have resulted in substantial energy savings for their clients. Their expertise in energy-efficient technologies and project management positions them as a valuable resource in the energy sector.

22. GreenStruxure

• Website: greenstruxure.com
• Ownership type: Private
• Headquarters: Boston, Massachusetts, United States (USA)
• Employee distribution: United States (USA) 44%, Mexico 33%, France 20%, Other 3%
• Latest funding: $15.0M, June 2022
• Founded year: 2020
• Headcount: 51-200
• LinkedIn: greenstruxure

GreenStruxure is an energy solutions provider based in Boston, Massachusetts, specializing in sustainable energy and microgrid development. Founded in 2020, the company focuses on delivering Energy as a Service (EaaS) and Energy Cost Optimization services to help businesses achieve energy resilience and sustainability. Their clientele spans various sectors, including healthcare, logistics, and commercial real estate, all seeking reliable energy solutions without the burden of upfront capital investment. GreenStruxure has received significant funding, with a reported amount of $15 million in June 2022, which supports their growth and innovation in the energy sector. The company aims to simplify access to clean energy, making it easier for organizations to meet their environmental, social, and governance (ESG) goals while optimizing energy costs.

Electric Power Insights: Key Companies in Massachusetts

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