The electric power companies in Connecticut play a crucial role in the state's energy landscape, focusing on both traditional and renewable sources. This sector features a variety of players, ranging from large utilities to smaller boutique firms, each offering tailored solutions such as energy efficiency, solar power, and consulting services. With an increasing emphasis on sustainability and innovative technologies, Connecticut's electric power industry is evolving rapidly. New regulations and consumer preferences are driving companies to adopt cleaner practices and diversify their energy portfolios, paving the way for green advancements and enhanced service delivery.

This listing highlights 21 electric power companies operating in Connecticut, showcasing a mix of sizes and founding years. With headquarters spread across the state, these firms vary from smaller, niche operations to larger, established entities. Many specialize in renewable energy, energy efficiency, or electricity supply, offering a wide array of services to residential, commercial, and industrial customers. The landscape reflects a commitment to innovation and sustainability, notably encompassing companies like Eversource and Greenskies Clean Focus.

Continue reading to discover the top electric power companies in Connecticut.

Top 21 Electric Power Companies Companies in Connecticut

1. US Power Generating Company

• Website: easterngeneration.com
• Ownership type: Corporate
• Headquarters: Stamford, Connecticut, United States (USA)
• Employee distribution: United States (USA) 100%
• Latest funding: December 2013
• Founded year: 2005
• Headcount: 51-200
• LinkedIn: us-power-generating-company

US Power Generating Company, also known as Alpha Generation, is an energy company based in Stamford, Connecticut. Established in 2005, the company specializes in managing and operating power generation facilities throughout the United States. With a workforce of approximately 61 employees, Alpha Generation is dedicated to delivering reliable electricity to utility companies and businesses. The company operates 22 generation facilities across states such as California, New Jersey, and New York, utilizing various fuel types including natural gas and oil. Their focus on sustainable energy solutions reflects a commitment to addressing the increasing demand for electricity while ensuring safety and reliability in their operations. Alpha Generation is backed by ArcLight Capital Partners, LLC, which supports their strategic initiatives in the power sector.

2. North American Power

• Website: napower.com
• Ownership type: Private
• Headquarters: Norwalk, Connecticut, United States (USA)
• Employee distribution: United States (USA) 100%
• Founded year: 2009
• Headcount: 51-200
• LinkedIn: north-american-power-and-gas-llc

North American Power, founded in 2009 and based in Norwalk, Connecticut, is a retail energy supplier that specializes in providing electricity and natural gas to customers in deregulated states across the United States. The company operates in various states, including Connecticut, Texas, and New York, among others. North American Power allows customers to select their energy supplier, offering competitive energy plans that cater to both residential and commercial needs. The company prides itself on its customer service, aiming to simplify the energy selection process for its clients. By purchasing electricity on the wholesale market, North American Power creates a range of plans for customers to choose from, ensuring they can manage their energy costs effectively. The company has garnered a customer base of over one million, reflecting its operational success and relevance in the energy market.

3. Eversource(formerly known as Yankee Gas)

• Website: yankeegas.com
• Ownership type: Private
• Headquarters: Berlin, Connecticut, United States (USA)
• Employee distribution: United States (USA) 100%
• Founded year: 1955
• Headcount: 501-1000
• LinkedIn: yankeegas

Eversource, formerly known as Yankee Gas, is an energy provider based in Berlin, Connecticut. Founded in 1955, the company serves approximately 4.4 million customers across New England, delivering electricity, natural gas, and water services. Eversource is recognized for its commitment to energy efficiency and sustainability, offering various programs designed to help customers manage their energy usage and costs effectively. The company actively engages in initiatives aimed at reducing its carbon footprint and promoting clean energy solutions, including solar energy and electric vehicle infrastructure. Eversource's operations are supported by a workforce of around 501 to 1000 employees, all dedicated to providing reliable energy and superior customer service. Their focus on community engagement and corporate responsibility further enhances their standing in the energy sector.

4. Paquette Electric Company, Inc

• Website: paquetteelectric.com
• Ownership type: Private
• Headquarters: Pomfret, Connecticut, United States (USA)
• Employee distribution: United States (USA) 100%
• Founded year: 1979
• Headcount: 11-50
• LinkedIn: paquette-electric-company-inc

Paquette Electric Company, Inc., founded in 1979, is an electrical contracting firm based in Pomfret, Connecticut. The company specializes in a variety of services, including electrical construction, generator sales and service, and energy conservation solutions. With a workforce of 11 to 50 employees, Paquette Electric serves residential, commercial, and industrial clients across Connecticut, Massachusetts, and Rhode Island. The firm prides itself on its quality workmanship and exceptional customer service, which have earned it a strong reputation in the region. Paquette Electric has also invested in state-of-the-art power quality monitoring equipment to meet the growing demand for sophisticated diagnostic capabilities. Their involvement in energy efficiency measures and partnerships with utility companies for incentive programs further highlights their commitment to sustainable practices. As a prequalified contractor for various state programs, Paquette Electric demonstrates its capability and reliability in the electrical contracting industry.

5. Discount Power Inc.

• Website: discountpowerinc.com
• Ownership type: Private
• Headquarters: Shelton, Connecticut, United States (USA)
• Employee distribution: United States (USA) 68%, Pakistan 32%
• Founded year: 2009
• Headcount: 11-50
• LinkedIn: discount-power-inc-

Discount Power Inc., founded in 2009 and based in Shelton, Connecticut, is a private energy supplier that specializes in providing electricity and natural gas services to both residential and commercial customers. The company offers a variety of energy plans, including fixed and variable pricing options, catering to the unique needs and budgets of its clients. With a focus on sustainability, Discount Power provides green energy solutions, ensuring that all available electricity plans are backed by renewable energy credits. They operate in seven states, including Delaware, Maryland, Massachusetts, New Jersey, Ohio, Pennsylvania, and Rhode Island, and are actively expanding their service area. The company prides itself on making energy purchasing straightforward and accessible, allowing customers to compare options and enroll easily. Their customer service is highlighted as a strong point, with many positive reviews reflecting satisfaction with their support and pricing.

6. Think Energy

• Website: thinkenergy.com
• Ownership type: Corporate
• Headquarters: Westport, Connecticut, United States (USA)
• Employee distribution: United States (USA) 100%
• Latest funding: September 2022
• Founded year: 2011
• Headcount: 11-50
• LinkedIn: think-energy

Think Energy, founded in 2011 and based in Westport, Connecticut, is an energy provider that focuses on clean electricity solutions. The company offers competitive electricity plans, community solar services, and cash rebates to residential consumers. Think Energy is dedicated to sustainability, aiming to offset carbon emissions and promote renewable energy sources. They provide customers with the option to offset 100% of their electricity consumption through renewable energy certificates derived from wind, solar, and hydro resources. Their Free Energy Club allows customers to earn cash rebates on their electricity bills, further incentivizing the use of clean energy. Think Energy operates in 13 states and the District of Columbia, making it a notable player in the deregulated energy market. Their partnership with organizations to protect the rainforest highlights their commitment to environmental stewardship.

7. Advantage Energy LLC

• Website: advantageenergy.net
• Ownership type: Private
• Headquarters: West Hartford, Connecticut, United States (USA)
• Employee distribution: Russia 79%, Canada 10%, United States (USA) 10%
• Founded year: 2010
• Headcount: 1-10
• LinkedIn: advantage-energy-llc

Advantage Energy LLC, founded in 2010 and based in West Hartford, Connecticut, is an energy consulting company dedicated to helping clients navigate the complexities of electricity procurement. The firm serves a range of customers, including residential, commercial, and industrial sectors, by providing tailored solutions that aim to reduce electricity costs. Advantage Energy acts as an authorized agent for various licensed electricity suppliers, offering clients competitive pricing and options that align with their unique energy profiles. The company emphasizes education, helping clients understand their choices in a deregulated market, which has been in place since the late 1990s in Connecticut. This focus on client education and support is central to their business model, as they strive to empower consumers to make informed decisions about their energy supply. Advantage Energy is licensed to operate in Connecticut and New Hampshire, with plans to expand into additional states, enhancing their ability to serve clients across a broader geographic area.

8. Realgy LLC (Realgy Energy Services)

• Website: realgyenergyservices.com
• Ownership type: Private
• Headquarters: West Hartford, Connecticut, United States (USA)
• Employee distribution: United States (USA) 100%
• Founded year: 1999
• Headcount: 11-50
• LinkedIn: realgy-llc-realgy-energy-services-

Realgy LLC, operating as Realgy Energy Services, is an energy service provider based in West Hartford, Connecticut. Founded in 1999, the company has established itself as a third-party supplier of electricity and natural gas, serving over 10,000 businesses across Illinois, Indiana, Ohio, and Michigan. Realgy offers a range of service plans, including fixed pricing, managed pricing, and variable rate options, allowing customers to choose solutions that best fit their energy needs. The company emphasizes customer service and employs advanced information technology to optimize energy purchasing strategies. Realgy is regulated by state commissions in the areas it serves, ensuring compliance with industry standards. With a focus on cost management and innovative energy solutions, Realgy continues to adapt to the evolving energy market.

9. Mitsubishi Power Aero

• Website: aero.power.mhi.com
• Ownership type: Private
• Headquarters: Glastonbury, Connecticut, United States (USA)
• Employee distribution: United States (USA) 78%, Algeria 7%, Russia 2%, Other 12%
• Founded year: 1961
• Headcount: 51-200
• LinkedIn: pw-power-systems

Mitsubishi Power Aero LLC, based in Glastonbury, Connecticut, is a power generation company that specializes in aero-derivative gas turbines and associated services. Founded in 1961, the company has established itself as a key player in the energy sector, providing solutions that help energy producers meet the demands of their communities. With a workforce of approximately 237 employees, Mitsubishi Power Aero operates globally, delivering reliable energy solutions tailored to the unique needs of various markets. The company is recognized for its innovative approach, working closely with customers to develop and optimize custom power generation solutions. Their product offerings include a range of gas turbine packages that generate between 30 to 140 MW of power, catering to peaking, baseload, and on-demand power needs. Mitsubishi Power Aero's commitment to sustainability is evident in their ongoing development of technologies that support the transition to cleaner energy sources, including the integration of hydrogen into their gas turbine operations. As a subsidiary of Mitsubishi Power Americas, they leverage the advanced technology of Pratt & Whitney aircraft engines, ensuring high efficiency and performance in their products.

10. The Kinsley Group

• Website: kinsley-group.com
• Ownership type: Private
• Headquarters: East Granby, Connecticut, United States (USA)
• Employee distribution: United States (USA) 100%
• Founded year: 1964
• Headcount: 51-200
• LinkedIn: kinsley-power-systems

The Kinsley Group, based in East Granby, Connecticut, has been a player in the energy solutions sector since its founding in 1964. With a workforce of approximately 157 employees, the company specializes in providing industrial and residential power systems. Their product offerings include generators powered by diesel, propane, and natural gas, as well as cogeneration systems that efficiently produce both electricity and useful heat. Additionally, they provide battery storage solutions, which are increasingly important in today's energy landscape. Kinsley Group serves a variety of sectors, including healthcare, education, and telecommunications, ensuring that their clients have access to reliable energy solutions. Their commitment to service and maintenance further solidifies their role in the energy market, as they support the longevity and efficiency of the systems they install. As an authorized distributor for Kohler in the Northeast, Kinsley Group has established itself as a trusted provider in the energy solutions industry.

11. MSL Group Inc.

• Website: mslgroupinc.com
• Ownership type: Private
• Headquarters: Manchester, Connecticut, United States (USA)
• Employee distribution: United States (USA) 65%, China 35%
• Founded year: 1988
• Headcount: 1-10
• LinkedIn: msl-group-inc.

MSL Group Inc., based in Manchester, Connecticut, has been operational since 1988. The company specializes in real estate development and renewable energy solutions, with a strong emphasis on sustainable practices. MSL Group develops, builds, owns, and operates various projects, including multi-family housing and renewable energy systems. Their renewable energy portfolio includes solar energy projects, fuel cells, biomass, EV charging stations, and energy storage solutions. In 2022, MSL Group was involved in developing six solar projects and three fuel cell projects, totaling a capacity of 2.74 megawatts. They also provide consulting services aimed at enhancing energy efficiency for property owners and businesses. MSL Group's focus on creating sustainable environments aligns with the growing demand for renewable energy solutions in the market.

12. 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 and energy storage systems. They cater to a variety of clients, including government agencies, educational institutions, and commercial businesses, assisting them in achieving their energy efficiency and sustainability goals. Ross Solar offers innovative energy management and financing options, positioning itself as a trusted partner in the transition to cleaner energy. Their focus on solar energy reflects the increasing shift towards renewable sources, and they play a role in the broader movement towards sustainable energy practices.

13. McPhee Electric, Ltd.

• Website: mcpheeusa.com
• Ownership type: Private
• Headquarters: Farmington, Connecticut, United States (USA)
• Employee distribution: United States (USA) 100%
• Founded year: 1974
• Headcount: 201-500
• LinkedIn: mcphee-electric-ltd.

McPhee Electric, Ltd. is an electrical contracting firm based in Farmington, Connecticut, with a history dating back to 1974. The company specializes in energy infrastructure and construction services, offering a range of solutions that include battery energy storage systems, electrical upgrades, and emergency power restoration. McPhee Electric serves a variety of clients, including utility companies and construction managers, who depend on their expertise for managing complex electrical projects. Their portfolio showcases significant projects such as the Cape Cod Battery Energy Storage System and the Aquidneck Island Reliability Project, highlighting their capability in handling large-scale electrical infrastructure upgrades. With a workforce of approximately 103 employees, McPhee Electric is well-positioned to address the evolving needs of the electric power industry, focusing on innovative solutions and reliable service.

14. Gemma Power Systems

• Website: gemmapower.com
• Ownership type: Private
• Headquarters: Glastonbury, Connecticut, United States (USA)
• Employee distribution: United States (USA) 100%
• Founded year: 1997
• Headcount: 51-200
• LinkedIn: gemma-power-systems

Gemma Power Systems, based in Glastonbury, Connecticut, is an engineering and construction firm that specializes in the power generation sector. Founded in 1997, the company has built a reputation for delivering comprehensive EPC services for utility-scale projects. Their portfolio includes combined cycle and simple cycle gas turbine plants, as well as renewable energy solutions such as solar and wind projects. With over 15 GW of installed capacity, Gemma has demonstrated its capability in managing complex projects across the United States. The company is a wholly owned subsidiary of Argan, Inc., which enhances its financial stability and project execution capabilities. Gemma's commitment to safety and quality is evident in their impressive track record, having achieved over 10 million safe work hours in recent years. They actively engage with local communities during project execution, ensuring that their operations positively impact the areas in which they work.

15. 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, founded in 2009 and based in North Haven, Connecticut, is a private equity-backed solar energy provider. The company focuses on renewable energy solutions tailored for municipalities, schools, nonprofits, and commercial entities. Greenskies offers a comprehensive suite of services, including project financing, operations and maintenance, and solar installations. This enables clients to reduce their energy costs and carbon footprints without the burden of upfront investments. With a commitment to long-term partnerships, Greenskies has developed and constructed over 320 MW of renewable energy facilities across more than 600 sites in 19 states. The company has been recognized as the number one commercial solar developer in the Northeast and ranks among the top three in the U.S. for cumulative kW installed. Greenskies operates with a vertically integrated model, managing the entire process from project origination to construction and ongoing operations, ensuring a streamlined experience for its clients.

16. 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, founded in 2008 and based in Ellington, Connecticut, is a family-owned solar energy company. With a workforce of approximately 91 employees, the company provides comprehensive solar solutions and energy efficiency services tailored for both residential and commercial customers. Their offerings include solar panel installations, energy storage systems, and electric vehicle (EV) charging stations. Earthlight Technologies is dedicated to reducing energy costs and promoting sustainable energy practices. They operate in multiple states, including Connecticut, Massachusetts, and Oregon, and emphasize customer service and support throughout the installation process and beyond. Their approach combines technical expertise with a commitment to helping clients transition to cleaner energy alternatives, making them a relevant player in the electric power industry.

17. Smart Roofs Energy

• Website: smartroofssolar.com
• Ownership type: Private
• Headquarters: Monroe, Connecticut, United States (USA)
• Employee distribution: United States (USA) 100%
• Founded year: 2013
• Headcount: 11-50
• LinkedIn: smart-roofs-solar

Smart Roofs Energy, founded in 2013 and based in Monroe, Connecticut, is a private renewable energy service company that focuses on commercial solar energy solutions. With a team of 21 employees, the company operates nationwide, providing a range of services including solar panel installations, energy storage systems, and electric vehicle (EV) charging stations. Smart Roofs Energy aims to assist businesses, municipalities, and non-profits in reducing their utility costs while transitioning to sustainable energy sources. They have been recognized for their growth and impact in the industry, having been named a Top Solar Company in the United States and a Top Overall Company in Connecticut by Inc. 5000. Their approach is comprehensive, handling everything from design and engineering to financing and installation, ensuring that clients receive a seamless experience in adopting renewable energy solutions.

18. Titan Energy

• Website: titanenergyne.com
• Ownership type: Corporate
• Headquarters: Hartford, Connecticut, United States (USA)
• Employee distribution: United States (USA) 74%, Democratic Republic of the Congo 9%, Mexico 9%, Other 9%
• Latest funding: December 2014
• Founded year: 2001
• Headcount: 11-50
• LinkedIn: titanenergynewengland

Titan Energy, founded in 2001 and based in Hartford, Connecticut, is an energy consulting firm that provides comprehensive energy management solutions. The company assists a variety of clients, including educational institutions, healthcare facilities, and government entities, in optimizing their energy procurement and efficiency strategies. Titan Energy focuses on reducing energy costs and promoting sustainable practices through innovative services such as on-site generation, which includes solar, combined heat and power (CHP), and fuel cell technologies. They also offer data management, community solar options, and energy efficiency solutions like LED lighting and EV charging. Titan Energy operates across competitive markets in the United States, leveraging their expertise to help organizations navigate the complexities of energy management and compliance with environmental, social, and governance (ESG) standards.

19. 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 provides energy solutions with a strong emphasis on solar power systems. They manufacture a variety of products, including solar charge controllers and inverters, specifically designed for remote telecommunications and off-grid applications. Their offerings cater primarily to telecommunications companies, enabling them to deliver reliable energy solutions in difficult environments. Apollo Solar's products are engineered to enhance energy efficiency and reduce operational costs, making them a valuable player in the electric power industry. The company has established a reputation for reliability, particularly with their T80 charge controllers, which are known for their performance in extreme conditions. Apollo Solar also engages in educational efforts, providing resources like white papers and case studies to promote best practices in reducing greenhouse gas emissions and improving energy efficiency.

20. 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 private solar energy company founded in 2022. With a team that boasts over 30 years of collective experience in the solar industry, Everlast Energy specializes in delivering renewable energy solutions tailored for both residential and commercial clients. Their services include solar panel installations, energy storage solutions, and the provision of battery and EV chargers. The company aims to help customers reduce their energy costs while minimizing their environmental footprint. Everlast Energy operates primarily in Connecticut, Massachusetts, and Rhode Island, and is committed to fostering a clean-energy community through its initiatives. The company has not reported any funding, indicating a self-sustained approach to its operations thus far.

21. Elecnor Energy Services

• Website: elecnorenergyservices.com
• Ownership type: Private
• Headquarters: South Windsor, Connecticut, United States (USA)
• Employee distribution: Spain 34%, United States (USA) 26%, Italy 16%, Other 24%
• Founded year: 2021
• Headcount: 11-50
• LinkedIn: elecnor-energy-services

Elecnor Energy Services, based in South Windsor, Connecticut, is a utility service provider that specializes in storm response and power restoration. Established in 2021, the company has quickly positioned itself as a vital resource for major utility companies across the United States. Their experienced crews are trained to respond swiftly to storm-related outages, ensuring that power is restored efficiently and safely. Elecnor Energy Services emphasizes a culture of safety and quality, which is critical in their line of work. The company is part of the Elecnor Group, a well-established Spanish business group with a presence in over 50 countries, known for its work in infrastructure and renewable energy. This affiliation provides Elecnor Energy Services with a robust foundation and access to a wealth of industry knowledge and resources.

Electric Power Companies Insights: Key Companies in Connecticut

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