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57 Most Innovative Connecticut Based Renewable Energy Companies & Startups

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This article showcases our top picks for the best Connecticut based Renewable Energy companies. These startups and companies are taking a variety of approaches to innovating the Renewable Energy industry, but are all exceptional companies well worth a follow.

We tried to pick companies across the size spectrum from cutting edge startups to established brands.

We selected these startups and companies for exceptional performance in one of these categories:

  • Innovation
    • Innovative ideas
    • Innovative route to market
    • Innovative product
  • Growth
    • Exceptional growth
    • Exceptional growth strategy
  • Management
  • Societal impact

Top Connecticut Renewable Energy Startups

Data sourced from Crunchbase and SemRush.

Altus Power America

Altus Power America

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Altus Power America Management is a leader in private investment in clean energy projects and renewable energy certificates

FuelCell Energy

FuelCell Energy

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FuelCell Energy, Inc. (NASDAQ: FCEL) is an integrated fuel cell company that designs, manufactures, installs, services and operates

FuelCell Energy

Cadenza Innovation

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Cadenza Innovation provides patented Li-ion battery design and architecture for a license to global manufacturers.

FuelCell Energy

P2 Science

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P2 Science develops a bio-refining process for the conversion of biomass such as vegetable oils into high-value specialty chemicals.

FuelCell Energy

Winters Bros. Waste Systems

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Winters Bros Waste Systems facilitates collection of waste, recycle and transfer stations in Florida, Vermont, Long Island and Connecticut.

FuelCell Energy

Proton Energy Systems

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Proton Energy Systems is a company that provides hydrogen, nitrogen, and zero air generators to labs, and energy production companies.

FuelCell Energy

Counterpointe Sustainable Real Estate

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CSRE is leading the way in financing energy efficiency, renewables seismic strengthening, storm protection for commercial real estate.

FuelCell Energy

Connecticut Green Bank

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Connecticut Green Bank is accelerating the growth of green energy for home and building owners across Connecticut.

FuelCell Energy

Source Renewables

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Source Renewables is a clean energy development company that develops community solar and storage projects.

FuelCell Energy

Eversource Energy

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Eversource transmits and delivers electricity and natural gas for more than 3.6 million electric and natural gas customers.

FuelCell Energy

New Haven Community Solar

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Clean Cheap Power for Low-Income Housing

FuelCell Energy

Starwood Energy Group Global

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Starwood Energy Group is a private investment firm based in Greenwich, CT that specializes in energy infrastructure investments.

FuelCell Energy

Spot On Networks

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Spot On Networks offers tech platforms that provide wireless broadband internet access to residential users in multifamily dwelling units.

FuelCell Energy

Greenskies Renewable Energy LLC

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Greenskies Renewable Energy is a renewables & environment company providing solar financing and project implementation services.

FuelCell Energy

GTherm

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GTherm, Inc. (“GTherm”) is dedicated to the development of environmentally-sound innovations for use in the energy and other markets.

FuelCell Energy

Pratt & Whitney Power Systems

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PW Power Systems, Inc. (PWPS), formerly Pratt & Whitney® Power Systems and now a subsidiary of Mitsubishi Heavy Industries, Ltd.

FuelCell Energy

SKYRE

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Skyre converts hydrogen and carbon dioxide into economic opportunities.

FuelCell Energy

Noble Environmental Power

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Noble Environmental Power is a leading renewable energy company.

FuelCell Energy

Palm Energy Systems

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Palm Energy Systems is developing transformative solar energy networks for neighborhoods, towns and cities

FuelCell Energy

Independent Energy LLC

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Develop and commercialize a zero emission, centrifugal force generator to power 100% off-grid buildings and electric vehicles.

FuelCell Energy

Gemma Power Systems

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Gemma Power Systemsis an Engineering, Procurement and Construction company providing solutions for power and renewable energy industry.

FuelCell Energy

Tradition Energy

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Tradition Energy is an oil & energy company offering energy consulting services.

FuelCell Energy

Kinsley Power Systems

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Kinsley Power Systems is an oil & energy company specializing in energy solutions.

FuelCell Energy

Automated Building Systems

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Automated Building Systems provides lighting control, reporting, energy, auditing, grant writing, monitoring & system integration services.

FuelCell Energy

Steven Winter Associates

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Steven Winter Associates is a renewables & environment company offering energy, sustainability, research, and accessibility services.

FuelCell Energy

Earthlight Technologies

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Earthlight is a renewables & environment firm that specializes in solar energy solutions for homes, businesses, and commercial buildings.

FuelCell Energy

Iroquois Gas Transmission System

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Iroquois Gas Transmission System is an oil & energy company that operates the natural gas pipeline.

FuelCell Energy

Thermaxx Jackets

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Thermaxx Jackets was founded over 25 years ago with a single purpose: to save energy .

FuelCell Energy

Blake Equipment Company

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Blake Equipment Company is a construction firm providing water and thermal energy solutions, equipment, products and services.

FuelCell Energy

TechniArt Inc.

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TechniArt Inc. is focused on developing and marketing products which involve alternative sources of energy.

FuelCell Energy

Alteris Renewables

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Alteris Renewables is the largest design-build renewable energy company in the Northeast, with more than 25 megawatts installed for over

FuelCell Energy

US Power Generating Company

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US Power Generating Company is an oil & energy company that generates and sells energy.

FuelCell Energy

Greenwich Energy Solutions

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Greenwich Energy Solutions is one of the premier providers of independent energy solutions.

FuelCell Energy

Starion Energy

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Starion Energy is an oil & energy company providing electricity and natural gas supply solutions.

FuelCell Energy

ATR Energy

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ATR Energy is a high-tech exploration and production company that offers oil drilling services.

FuelCell Energy

MSL Group

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MSL Group handles roof-mounted and ground-mounted solar projects.

FuelCell Energy

SunEast Development

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SunEast is a privately held clean energy development and management services company.

FuelCell Energy

Greenleaf Biofuels

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Greenleaf Biofuels is a limited liability company formed in 2004 to bring renewable energy alternatives to Americans who value preserving

FuelCell Energy

Canusa Hershman Recycling

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Canusa Hershman offers a wide array of services designed to help maximize the profitability and effectiveness of the recycling efforts.

FuelCell Energy

Ashe Morris

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Ashe Morris is developing a new technology that controls the temperature by changing the effective heat transfer area itself.

FuelCell Energy

IHS Herold

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IHS Herold is an oil & energy company offering research and development services.

FuelCell Energy

Poplar Network

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Poplar is the world’s leading green building network. We connect professionals through LEED and green building education.

FuelCell Energy

Public Power International

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Public Power International is a licensed supplier of electricity and gas in the the United States.

FuelCell Energy

Eastern Gen

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Eastern Gen is a portfolio company that sells capacity, energy & ancillary services in the merchant markets and generates assets accounts.

FuelCell Energy

RPM Sustainable Technologies

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Chemical process development company

FuelCell Energy

Dr. Energy Saver

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Dr. Energy Saver provides comprehensive home energy audits and a broad range of energy saving services

FuelCell Energy

Green Energy Solution Industries Inc

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Green Energy Solutions is a organization that promotes energy efficiency, and has been doing energy saving programs since 1989.

FuelCell Energy

Aterra Energy

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Aterra Energy

FuelCell Energy

Connecticut Light & Power

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Connecticut Light & Power is a regional utility company providing electricity in New England.

FuelCell Energy

Blue Delta Energy

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Blue Delta offers sustainability, renewable and clean energy solutions for various sectors.

FuelCell Energy

Grove Strategic Ventures

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GSV, Inc. is an oil and gas exploration company.

FuelCell Energy

PurePoint Energy

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PurePoint Energy is a solar energy company that provides renewable energy solutions.

FuelCell Energy

Renewable Search

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Cleantech executive search firm for the Solar, Wind, Energy Storage, Efficiency, IoT and Smart Grid markets. Retained executive search.

FuelCell Energy

Sound Solar Systems

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A licensed solar energy installer.

FuelCell Energy

BNE Energy

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BNE Energy is a company for the purpose of developing wind generation.

FuelCell Energy

Energy Research Center

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Energy Research Center, Inc

FuelCell Energy

Pampa

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Pampa Corporation offers renewable energy generation, energy conservation, waste management and house development services.

Written by Mark Smith

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