Clean Energy Ventures

Clean Energy Ventures is a venture capital firm focused on seed and early-stage investments in climate technology and advanced energy innovations. The firm targets technologies and business model innovations that address climate change and greenhouse gas emissions, with emphasis on energy storage, grid connectivity, renewable energy production, clean transportation, and the water-energy nexus. It seeks scalable solutions ready for commercial deployment and supports them with capital and guidance to accelerate growth. Headquartered in Boston, Massachusetts, Clean Energy Ventures is the venture capital arm of Clean Energy Venture Group and concentrates its activity in the United States and Canada, drawing on the group’s network and operational experience to help portfolio companies scale.

Anne Andrew JD

Partner

Micha Ben-Naim

Investor

John Bobrowich

Venture Partner

Ben Chigier

Venture Partner

Yi-Jean Chow

Investment Principal

Yi Jean Chow

Principal

Matthew Cohen

Principal

Matt Cohen

Principal

Ted Dillon

COO

Ralph Earle III

Managing Director

James Ellis

Partner

James Ellis

Venture Partner

Temple Fennell

Managing Partner

Virginia Foote

Venture Partner

Dan Goldman

Managing Partner

Kedar Gupta Ph.D

Partner

Shanbor Gupta

Investor

Renu Gupta

Partner

John Harper

Executive Managing Director, Partner, Venture Partner

Ariel Hyre

Analyst

Bradley Jones

Partner

Sven Karlsson

Partner

John Keane Jr.

Venture Partner

Tal Levy

Partner

Raffi Mardirosian

Partner

David S. Miller

Co-Founder and Managing Director

David Miller Ph.D

Co-Founder and Managing Partner

Dave Miller

Managing Partner

Francois Odouard

Partner

Willy Osborn

Venture Partner

Jean-Noel Poirier

Venture Partner

Adam de Sola Pool

Partner

Wynston Reed

Investor

Wanda Reindorf

Venture Partner

Peter Schewinfurth

Partner

Louis Schick

Investor

Lou Schick

Director of Investments

Peter Sopher

Partner

Cara Tobin Ph.D

Venture Partner

Mitchell Tyson

Venture Partner

Jeffery Weiss

Venture Partner

Jeffrey Weiss

Senior Venture Partner

John Wisniewski

Partner

Amy Zhao

Investor

Zaurie Zimmerman

Partner

Past deals in CleanTech

Queens Carbon

Seed Round in 2025
Queens Carbon is focused on developing a hydrothermal processing technology aimed at significantly reducing energy consumption in industrial applications. The company's innovative system minimizes the energy required for calcination and material synthesis, which is crucial for carbon capture and the production of carbon-neutral cement. By enhancing energy efficiency, Queens Carbon enables industries to lower their greenhouse gas emissions, thereby contributing to sustainable development and addressing the challenges posed by climate change.

MacroCycle Technologies

Seed Round in 2025
MacroCycle Technologies is a company developing a chemical recycling process to convert polyethylene terephthalate (PET) and polyester-fiber waste into virgin-grade plastics. Their proprietary technology, based on synthesizing cyclic macromolecules, enables the production of recycled PET with lower energy use than traditional methods. This process offers a sustainable, zero-carbon, and cost-competitive solution for plastic upcycling, contributing to a circular economy.

Advanced Ionics

Venture Round in 2025
Advanced Ionics specializes in developing innovative electrolyzer technology for generating green hydrogen. The company's primary goal is to lower the costs associated with green hydrogen production by leveraging existing industrial infrastructure and minimizing electricity consumption. This approach supports global decarbonization efforts by offering tailored solutions for various industries.

Electrified Thermal Solutions

Venture Round in 2024
Electrified Thermal Solutions, founded in 2021 and based in Medford, Massachusetts, develops innovative energy storage technology. The company converts intermittent renewable electricity into constant heat using low-cost conductive ceramic blocks, enabling industrial sectors to replace fossil fuels with zero-carbon heat.

Lithios

Seed Round in 2024
Lithios is a technology company that uses electrochemistry for advanced lithium extraction from complex mixtures and untapped brine resources, applying electrochemical methods to capture and release lithium and enable low-cost, selective extraction for industries pursuing a sustainable, electrified future.

Travertine

Venture Round in 2024
Travertine is a company focused on carbon dioxide removal and industrial chemical production, aiming to mitigate the environmental impact associated with the extraction of elements for renewable energy. Utilizing a proprietary electrochemical process, Travertine converts carbon dioxide from the atmosphere into mineral forms while simultaneously producing sulfuric acid, which is essential for critical element extraction and fertilizer production. The company effectively recycles sulfate wastes to generate sulfuric acid, thereby minimizing chemical waste during these processes. Additionally, Travertine generates high-quality carbon credits through its direct air capture and mineralization efforts, contributing to a sustainable approach in mining and fertilizer industries.

Aepnus Technology

Seed Round in 2024
Aepnus Technology develops electrolysis equipment designed to refine minerals and desalinate water. Its technology enables the production of low-cost electrified chemicals, facilitating the transition towards a carbon-free industry.

Ndustrial

Series B in 2024
Ndustrial provides analytical engines that enhance businesses' production control, improve energy efficiency, and minimize waste. Primarily serving mid-tier manufacturers, they integrate legacy data, streamline Industrial IoT deployments, and host predictive control algorithms to optimize operations globally.

Evari

Seed Round in 2024
Evari is a clean-tech firm developing next-generation tiny, oil-free turbocompressors for heating and cooling applications to help with the global energy transition and expedite the decarbonization of various industries.

Cala Systems

Seed Round in 2024
Altus Thermal, founded in 2019 and based in Boston, Massachusetts, focuses on transforming thermal energy solutions for residential settings. The company aims to enhance efficiency, comfort, and user experience while providing benefits to the electrical grid. Altus Thermal develops energy technology designed to electrify residential heating, cooling, and hot water systems. By maximizing performance and facilitating better integration with renewable energy sources and other distributed energy resources, the company enables homeowners to electrify their living spaces in an efficient and cost-effective manner.

Advanced Ionics

Series A in 2023
Advanced Ionics specializes in developing innovative electrolyzer technology for generating green hydrogen. The company's primary goal is to lower the costs associated with green hydrogen production by leveraging existing industrial infrastructure and minimizing electricity consumption. This approach supports global decarbonization efforts by offering tailored solutions for various industries.

Carbon Upcycling

Series A in 2023
Carbon Upcycling is a carbon technology company focused on decarbonizing hard-to-abate industries through its patented technology. This innovation allows for the permanent storage of carbon dioxide in industrial byproducts and minerals, effectively transforming them into high-performance alternative materials for cement and concrete. By doing so, Carbon Upcycling aims to significantly reduce the carbon footprint of industrial processes while diverting materials from landfills, thereby supporting a circular economy. The company has garnered international recognition for its advancements, being awarded the Carbon XPrize’s X-Factor, named NRMCA’s 2023 Innovative Company, and included in Cleantech Group’s Global Cleantech 100 and Foresight 50’s Canada’s Most Investable Cleantech Ventures.

NitroFix

Seed Round in 2023
NitroFix develops emission-free ammonia generation technology. Its innovative electrochemical process, aided by a novel catalyst, produces ammonia with zero carbon emissions.

OxCCU

Series A in 2023
OxCCU develops renewable energy technology to enable a circular economy for fuels, chemicals, and plastics. The technology combines carbon dioxide from the atmosphere with hydrogen from water and renewable electricity to produce fuels, chemicals, and biodegradable plastics and is positioned to deliver the lowest-cost Power to Liquids pathway.

QEA Tech

Seed Round in 2023
QEA Tech is a software company that combines AI, drone technology, and thermal imaging to provide insights into the building envelope. They process thousands of images using its proprietary software, transforming each pixel into a comprehensive 3D model of the building for quantifiable data and insights. Using 10,000+ high-resolution drone images, proprietary QEA Tech software converts each pixel into quantifiable data and a comprehensive 3D model before uploading each image to the cloud-based dashboard for 24/7 access. The QEA System identifies where and how much energy is being wasted in a building's envelope, allowing you to prioritize repairs and calculate payback and ROI. The QEA Solution calculates Negawatt (NKwh), which quantifies energy gushers (heat and cool air escaping) through the walls, windows, doors, and roof of the building.

VoltServer

Series B in 2023
VoltServer develops innovative power distribution products using its patented Digital Electricity technology. It manufactures solutions that deliver touch-safe electricity via off-the-shelf data cables, offering significant cost savings, increased speed, distance, efficiency, intelligence, and flexibility compared to traditional electrical installations. Established in 2011, VoltServer serves diverse industries such as telecommunications, data centers, renewable energy, electric vehicles, indoor agriculture, and commercial buildings.

Electrified Thermal Solutions

Venture Round in 2022
Electrified Thermal Solutions, founded in 2021 and based in Medford, Massachusetts, develops innovative energy storage technology. The company converts intermittent renewable electricity into constant heat using low-cost conductive ceramic blocks, enabling industrial sectors to replace fossil fuels with zero-carbon heat.

Travertine

Seed Round in 2022
Travertine is a company focused on carbon dioxide removal and industrial chemical production, aiming to mitigate the environmental impact associated with the extraction of elements for renewable energy. Utilizing a proprietary electrochemical process, Travertine converts carbon dioxide from the atmosphere into mineral forms while simultaneously producing sulfuric acid, which is essential for critical element extraction and fertilizer production. The company effectively recycles sulfate wastes to generate sulfuric acid, thereby minimizing chemical waste during these processes. Additionally, Travertine generates high-quality carbon credits through its direct air capture and mineralization efforts, contributing to a sustainable approach in mining and fertilizer industries.

Itselectric

Pre Seed Round in 2022
Itselectric provides curbside electric vehicle charging solutions tailored for urban environments, connecting charging posts behind the meter to adjacent buildings. The system expands public charging access, helping overcome infrastructure and environmental justice barriers, encouraging EV adoption, and improving air quality and community health. Property owners can earn passive income by hosting the charging posts.

Advanced Ionics

Seed Round in 2022
Advanced Ionics specializes in developing innovative electrolyzer technology for generating green hydrogen. The company's primary goal is to lower the costs associated with green hydrogen production by leveraging existing industrial infrastructure and minimizing electricity consumption. This approach supports global decarbonization efforts by offering tailored solutions for various industries.

Carbon Upcycling

Venture Round in 2022
Carbon Upcycling is a carbon technology company focused on decarbonizing hard-to-abate industries through its patented technology. This innovation allows for the permanent storage of carbon dioxide in industrial byproducts and minerals, effectively transforming them into high-performance alternative materials for cement and concrete. By doing so, Carbon Upcycling aims to significantly reduce the carbon footprint of industrial processes while diverting materials from landfills, thereby supporting a circular economy. The company has garnered international recognition for its advancements, being awarded the Carbon XPrize’s X-Factor, named NRMCA’s 2023 Innovative Company, and included in Cleantech Group’s Global Cleantech 100 and Foresight 50’s Canada’s Most Investable Cleantech Ventures.

Nth Cycle

Series A in 2022
Nth Cycle is a company specializing in metal processing technology. It collaborates with battery recyclers and miners to recover critical minerals from electronic waste and low-grade mine tailings using its proprietary electro-extraction method, offering an alternative to traditional hydrometallurgy and pyrometallurgy processes.

Bodhi

Seed Round in 2022
Bodhi's mission is to cultivate the bond between people and the energy that powers their lives. Our software platform empowers solar companies to deliver amazing customer experiences with ease. Bodhi automates communication and personalizes the homeowners’ experience, so that installers can focus on what they do best - executing projects, making more sales, and transforming communities around energy.

REsurety

Series B in 2021
REsurety, Inc. is a risk transfer intermediary focused on enhancing the profitability of wind power projects through innovative risk management solutions. Founded in 2012 and based in Boston, Massachusetts, the company specializes in providing data, analytics, and related services that help clients evaluate, quantify, and optimize the value of wind volume hedging. By streamlining the process of risk transfer, REsurety supports wind project developers, owners, and financial underwriters in effectively managing the inherent risks associated with renewable energy investments. The company's technology integrates physical science, big data, and financial engineering, enabling clients to make informed decisions that maximize the resilience and sustainability of clean energy projects.

ClearFlame Engines

Series A in 2021
ClearFlame Engines, Inc. develops and manufactures innovative engines for heavy-duty applications, focusing on decarbonizing the industry by replacing traditional diesel engines. Established in 2016 and headquartered in Woodridge, Illinois, the company serves diverse markets, including marine, agriculture, transportation, power generation, rail, and construction. ClearFlame's patented technology allows heavy-duty engine manufacturers to produce engines that offer higher performance and lower operating costs, providing significant fuel cost savings for their customers. The company's mission is to address the environmental challenges posed by diesel fuel while enhancing engine efficiency and affordability.

Leading Edge Equipment Technologies

Convertible Note in 2021
Founded in 2008, this company specializes in manufacturing equipment for solar panel production. Its core technology, the floating silicon method, enhances wafer efficiency, reduces manufacturing costs and emissions.

BlueDot Photonics

Seed Round in 2021
BlueDot Photonics, Inc. is a company based in Kirkland, Washington, that specializes in the design, development, and production of solar panels and other photonic devices. Incorporated in 2019, BlueDot focuses on enhancing the performance and durability of solar energy devices. By utilizing innovative semiconductor materials, the company aims to increase the power output of solar panels, making clean energy more accessible and affordable for a broader range of customers.

Pearl Certification

Series A in 2021
Pearl Certification is a national firm that provides third-party certification of healthy, safe, comfortable, energy- and water-efficient homes. It works with real estate agents, contractors, and builders to help sellers illustrate the value of home investments and increase buyer confidence in major transactions. The company uses a proprietary algorithm that integrates safety, comfort, operating efficiency, resilience, and energy profile to make home performance visible and measurable, enabling homeowners, buyers, and real estate professionals to unlock value in properties and promote higher-performance building practices.

Boston Materials

Series A in 2021
Boston Materials designs and manufactures advanced composite materials, including carbon fiber pre-pregs enabled by its patented Z-axis Fiber technology, which uses vertically aligned carbon fibers to improve energy transfer. The company produces magnetically assembled carbon fiber pre-pregs and other specialty materials for semiconductors, aerospace platforms, and thermal management, delivering lightweight, high-performance solutions for electronics, aviation, electrified vehicles, and related industries. Its processes include roll-to-roll manufacturing with in-line quality control to support scalable production and consistent quality across applications.

Ndustrial

Series A in 2021
Ndustrial provides analytical engines that enhance businesses' production control, improve energy efficiency, and minimize waste. Primarily serving mid-tier manufacturers, they integrate legacy data, streamline Industrial IoT deployments, and host predictive control algorithms to optimize operations globally.

Volexion

Seed Round in 2021
Founded in Chicago, Illinois in 2018, Volexion specializes in manufacturing lithium ion batteries. Its proprietary graphene coating technology enhances conventional lithium-ion batteries, offering clients improved battery life, power performance, and a wider temperature and voltage range.

Nth Cycle

Venture Round in 2021
Nth Cycle is a company specializing in metal processing technology. It collaborates with battery recyclers and miners to recover critical minerals from electronic waste and low-grade mine tailings using its proprietary electro-extraction method, offering an alternative to traditional hydrometallurgy and pyrometallurgy processes.

ClearTrace

Series A in 2020
ClearTrace is a software company that provides automated energy and carbon accounting via a blockchain-enabled cloud platform. Its SaaS solution creates verifiable digital records of energy usage and tracks third-party energy supply, financial power purchase agreements, demand response, and behind-the-meter energy assets, supporting reporting, auditing, and compliance across the energy supply chain. The company serves renewable energy suppliers, corporations, and commercial real estate owners, helping to establish a single source of truth for decarbonization claims and reduce greenwashing. Founded in 2017 and based in Austin, Texas, ClearTrace develops digital infrastructure and immutable data representations to measure and verify real-world energy emissions, enabling clients to pursue sustainability and financial goals.

Boston Materials

Convertible Note in 2020
Boston Materials designs and manufactures advanced composite materials, including carbon fiber pre-pregs enabled by its patented Z-axis Fiber technology, which uses vertically aligned carbon fibers to improve energy transfer. The company produces magnetically assembled carbon fiber pre-pregs and other specialty materials for semiconductors, aerospace platforms, and thermal management, delivering lightweight, high-performance solutions for electronics, aviation, electrified vehicles, and related industries. Its processes include roll-to-roll manufacturing with in-line quality control to support scalable production and consistent quality across applications.

Leading Edge Equipment Technologies

Series A in 2020
Founded in 2008, this company specializes in manufacturing equipment for solar panel production. Its core technology, the floating silicon method, enhances wafer efficiency, reduces manufacturing costs and emissions.

SunDensity

Seed Round in 2020
SunDensity Inc. is a Boston-based company that specializes in the research, design, and development of innovative Photonic Smart Coating (PSC™) technology. Established in 2016, the company focuses on enhancing efficiencies in photonics through the up and down conversion of light wavelengths, addressing various inefficiencies in the field. SunDensity's PSC™ technology is designed to lower electricity costs generated by solar photovoltaic applications, optimize the thermal and optical properties of architectural glass, and improve the quantum efficiency of optoelectronic instruments. The company also maintains an office in Rochester, New York, where it continues to advance its groundbreaking technologies.

Boston Materials

Seed Round in 2020
Boston Materials designs and manufactures advanced composite materials, including carbon fiber pre-pregs enabled by its patented Z-axis Fiber technology, which uses vertically aligned carbon fibers to improve energy transfer. The company produces magnetically assembled carbon fiber pre-pregs and other specialty materials for semiconductors, aerospace platforms, and thermal management, delivering lightweight, high-performance solutions for electronics, aviation, electrified vehicles, and related industries. Its processes include roll-to-roll manufacturing with in-line quality control to support scalable production and consistent quality across applications.

ClearFlame Engines

Seed Round in 2020
ClearFlame Engines, Inc. develops and manufactures innovative engines for heavy-duty applications, focusing on decarbonizing the industry by replacing traditional diesel engines. Established in 2016 and headquartered in Woodridge, Illinois, the company serves diverse markets, including marine, agriculture, transportation, power generation, rail, and construction. ClearFlame's patented technology allows heavy-duty engine manufacturers to produce engines that offer higher performance and lower operating costs, providing significant fuel cost savings for their customers. The company's mission is to address the environmental challenges posed by diesel fuel while enhancing engine efficiency and affordability.

Leading Edge Equipment Technologies

Convertible Note in 2020
Founded in 2008, this company specializes in manufacturing equipment for solar panel production. Its core technology, the floating silicon method, enhances wafer efficiency, reduces manufacturing costs and emissions.

Rebound Technologies

Series A in 2020
Rebound Technologies manufactures innovative thermal energy storage systems for commercial freezer environments and off-grid cooling. Its flagship products include IcePoint, a low-temperature refrigeration solution for supermarkets, and SunChill, an off-grid refrigeration system designed to improve agricultural productivity by removing field heat from crops post-harvest. The company's solutions are used by retail stores and farmers in the United States.

Pearl Certification

Series A in 2019
Pearl Certification is a national firm that provides third-party certification of healthy, safe, comfortable, energy- and water-efficient homes. It works with real estate agents, contractors, and builders to help sellers illustrate the value of home investments and increase buyer confidence in major transactions. The company uses a proprietary algorithm that integrates safety, comfort, operating efficiency, resilience, and energy profile to make home performance visible and measurable, enabling homeowners, buyers, and real estate professionals to unlock value in properties and promote higher-performance building practices.

Boston Materials

Convertible Note in 2019
Boston Materials designs and manufactures advanced composite materials, including carbon fiber pre-pregs enabled by its patented Z-axis Fiber technology, which uses vertically aligned carbon fibers to improve energy transfer. The company produces magnetically assembled carbon fiber pre-pregs and other specialty materials for semiconductors, aerospace platforms, and thermal management, delivering lightweight, high-performance solutions for electronics, aviation, electrified vehicles, and related industries. Its processes include roll-to-roll manufacturing with in-line quality control to support scalable production and consistent quality across applications.

Rebound Technologies

Series A in 2019
Rebound Technologies manufactures innovative thermal energy storage systems for commercial freezer environments and off-grid cooling. Its flagship products include IcePoint, a low-temperature refrigeration solution for supermarkets, and SunChill, an off-grid refrigeration system designed to improve agricultural productivity by removing field heat from crops post-harvest. The company's solutions are used by retail stores and farmers in the United States.

Pearl Certification

Series A in 2019
Pearl Certification is a national firm that provides third-party certification of healthy, safe, comfortable, energy- and water-efficient homes. It works with real estate agents, contractors, and builders to help sellers illustrate the value of home investments and increase buyer confidence in major transactions. The company uses a proprietary algorithm that integrates safety, comfort, operating efficiency, resilience, and energy profile to make home performance visible and measurable, enabling homeowners, buyers, and real estate professionals to unlock value in properties and promote higher-performance building practices.

Leading Edge Equipment Technologies

Seed Round in 2019
Founded in 2008, this company specializes in manufacturing equipment for solar panel production. Its core technology, the floating silicon method, enhances wafer efficiency, reduces manufacturing costs and emissions.

Boston Materials

Seed Round in 2018
Boston Materials designs and manufactures advanced composite materials, including carbon fiber pre-pregs enabled by its patented Z-axis Fiber technology, which uses vertically aligned carbon fibers to improve energy transfer. The company produces magnetically assembled carbon fiber pre-pregs and other specialty materials for semiconductors, aerospace platforms, and thermal management, delivering lightweight, high-performance solutions for electronics, aviation, electrified vehicles, and related industries. Its processes include roll-to-roll manufacturing with in-line quality control to support scalable production and consistent quality across applications.

Leading Edge Equipment Technologies

Convertible Note in 2018
Founded in 2008, this company specializes in manufacturing equipment for solar panel production. Its core technology, the floating silicon method, enhances wafer efficiency, reduces manufacturing costs and emissions.

EnergySage

Series A in 2018
EnergySage, LLC is an online marketplace based in Boston, Massachusetts, that specializes in solar and clean energy technologies for homeowners, businesses, and non-profits. Founded in 2009, the company provides a platform that enables consumers to explore a variety of energy solutions, including rooftop solar, battery storage, community solar, heat pumps, electric vehicle charging, and more. EnergySage offers educational content, analytical tools, and standardized shopping experiences, allowing users to request and compare competitive quotes from pre-screened installers. This facilitates informed decision-making and streamlines the process of selecting and installing clean energy systems, making it a valuable resource for those seeking sustainable energy alternatives.

Leading Edge Equipment Technologies

Seed Round in 2017
Founded in 2008, this company specializes in manufacturing equipment for solar panel production. Its core technology, the floating silicon method, enhances wafer efficiency, reduces manufacturing costs and emissions.

CIMCON Lighting

Series B in 2017
CIMCON Lighting, established in 2012, specializes in developing web-based wireless outdoor lighting management systems. Headquartered in Burlington, Massachusetts, the company serves utilities, municipalities, ESCOs, and commercial customers by providing solutions for traditional, LED, and solar-based street lights. Their offerings include the LightingGale software for automated streetlight management, wireless controllers like iSLC-3100 with dimming capabilities, and the NearSky platform for smart city applications. CIMCON's systems enable clients to remotely monitor and control outdoor lighting fixtures, reducing energy consumption and maintenance costs while transforming existing infrastructure into a foundation for smart city solutions.

Autonomous Marine Systems

Seed Round in 2016
Autonomous Marine Systems Inc. is a marine data services company based in Somerville, Massachusetts, established in 2009. The company specializes in collecting and transmitting hydrographic data utilizing low-cost, self-powered ocean surface drones that operate autonomously. These wind and solar-powered robotic sailboats are deployed in fleets to form an intelligent sensor network, enabling customized surveys for various sectors including defense, energy, shipping, fishing, and research. By providing long-duration mission capabilities over extensive geographic areas, Autonomous Marine Systems allows clients to gather crucial marine data while minimizing risks to human life and reducing the costs associated with traditional vessels in challenging marine environments.

VoltServer

Series A in 2015
VoltServer develops innovative power distribution products using its patented Digital Electricity technology. It manufactures solutions that deliver touch-safe electricity via off-the-shelf data cables, offering significant cost savings, increased speed, distance, efficiency, intelligence, and flexibility compared to traditional electrical installations. Established in 2011, VoltServer serves diverse industries such as telecommunications, data centers, renewable energy, electric vehicles, indoor agriculture, and commercial buildings.

Solantro Semiconductor

Venture Round in 2015
Solantro Semiconductor Corp. is a Canadian semiconductor company established in 2009, specializing in the design and manufacture of integrated circuits for grid applications, particularly within the renewable energy sector. The company develops a range of products, including analog power managers, DC-DC power optimizers, and micro-inverter controllers, which are essential for converting solar energy into usable power. Their chipsets enhance solar panels, enabling them to function as integrated power generators. Solantro's technology supports various applications, including intelligent photovoltaic module safety disconnects and battery chargers, while also offering software development tools for system integration. The company serves clients in power electronics, smart grid, and renewable energy industries, providing semiconductor-based architectures that facilitate the measurement, processing, and management of power from distributed energy resources.

Quidnet Energy

Seed Round in 2015
Founded in 2013, Quidnet Energy develops grid-scale energy storage systems using a unique hydroelectric technology. The company stores excess renewable energy by pumping water under pressure into underground geological reservoirs and releases it to drive hydroelectric turbines when needed. This process enables seamless integration with existing electricity-generating facilities at a lower cost than lithium-ion batteries.

Bevi

Seed Round in 2015
Bevi develops bottle-less water dispensers for offices and commercial spaces that dispense beverages made from filtered tap water with natural flavors, including real fruit essences. The systems allow users to customize drinks and view nutrition information, while the company emphasizes tracking environmental impact and reducing waste from bottled beverages. The technology is designed to run on the municipal water supply, aiming to transform beverage delivery by offering eco-friendly, healthy hydration options on site.

Skystream Markets

Series A in 2014
Skystream Markets Inc. operates as an institutional transaction platform for the environmental markets in the United States and internationally. Its platform offers automation in the trade cycle, including execution, trade capture, processing, and reporting. The company also acts as a neutral intermediary for market participants in the environmental markets; provides client support, which includes structuring customized physical and financial hedging strategies in the spot, option, and forward markets; and builds auctions and electronic markets for the primary and secondary markets in renewable energy certificate (REC) markets. In addition, Skystream Markets offers transaction services in REC markets. Further, the company operates a trading platform that connects pools of capital with renewable power projects through an electronic process. It serves power producers and major trading counterparties. Skystream Markets was founded in 2009 and is based in New York, New York with a sales office in Boston, Massachusetts.

REsurety

Seed Round in 2014
REsurety, Inc. is a risk transfer intermediary focused on enhancing the profitability of wind power projects through innovative risk management solutions. Founded in 2012 and based in Boston, Massachusetts, the company specializes in providing data, analytics, and related services that help clients evaluate, quantify, and optimize the value of wind volume hedging. By streamlining the process of risk transfer, REsurety supports wind project developers, owners, and financial underwriters in effectively managing the inherent risks associated with renewable energy investments. The company's technology integrates physical science, big data, and financial engineering, enabling clients to make informed decisions that maximize the resilience and sustainability of clean energy projects.

REsurety

Seed Round in 2014
REsurety, Inc. is a risk transfer intermediary focused on enhancing the profitability of wind power projects through innovative risk management solutions. Founded in 2012 and based in Boston, Massachusetts, the company specializes in providing data, analytics, and related services that help clients evaluate, quantify, and optimize the value of wind volume hedging. By streamlining the process of risk transfer, REsurety supports wind project developers, owners, and financial underwriters in effectively managing the inherent risks associated with renewable energy investments. The company's technology integrates physical science, big data, and financial engineering, enabling clients to make informed decisions that maximize the resilience and sustainability of clean energy projects.

VoltServer

Series A in 2013
VoltServer develops innovative power distribution products using its patented Digital Electricity technology. It manufactures solutions that deliver touch-safe electricity via off-the-shelf data cables, offering significant cost savings, increased speed, distance, efficiency, intelligence, and flexibility compared to traditional electrical installations. Established in 2011, VoltServer serves diverse industries such as telecommunications, data centers, renewable energy, electric vehicles, indoor agriculture, and commercial buildings.

Skystream Markets

Series A in 2012
Skystream Markets Inc. operates as an institutional transaction platform for the environmental markets in the United States and internationally. Its platform offers automation in the trade cycle, including execution, trade capture, processing, and reporting. The company also acts as a neutral intermediary for market participants in the environmental markets; provides client support, which includes structuring customized physical and financial hedging strategies in the spot, option, and forward markets; and builds auctions and electronic markets for the primary and secondary markets in renewable energy certificate (REC) markets. In addition, Skystream Markets offers transaction services in REC markets. Further, the company operates a trading platform that connects pools of capital with renewable power projects through an electronic process. It serves power producers and major trading counterparties. Skystream Markets was founded in 2009 and is based in New York, New York with a sales office in Boston, Massachusetts.

7AC Technologies

Debt Financing in 2011
7AC Technologies Inc. is a company based in Beverly, Massachusetts, that specializes in innovative HVAC solutions using a unique membrane-isolated plastic plate technology. Founded in 2009 and formerly known as 7Solar Technologies, the company focuses on developing ultra-efficient liquid desiccant systems designed for commercial and industrial buildings. These systems offer significant energy savings, achieving over a 50% reduction in energy costs compared to traditional HVAC units. As of November 2020, 7AC Technologies operates as a subsidiary of Emerson Electric Co.

MyEnergy

Series A in 2011
MyEnergy is a company dedicated to helping households across the United States reduce energy consumption and save on utility bills. It offers a free platform where users can access personalized energy-saving tips and incentives, compare their energy usage with others, and set goals to track their progress. The platform includes algorithms that collect and analyze utility energy data to provide tailored recommendations. Additionally, users can earn rewards for successfully lowering their energy bills. MyEnergy is compatible with hundreds of utilities nationwide and aims to serve over 90% of the U.S. population.

OutSmart Power Systems

Seed Round in 2009
OutSmart Power Systems, LLC is a Massachusetts-based company that specializes in lean energy management software and services designed for commercial and industrial (C&I) buildings, particularly grocery stores, convenience stores, and cold storage facilities. Established in 2008, the company offers innovative solutions such as EnergyMate, a miniature metering technology that monitors energy and power parameters, and the OutSmart Analytics Platform (OSAP), which stores and analyzes data to uncover energy-saving opportunities. OutSmart's approach focuses on providing detailed insights into energy consumption and equipment health, particularly for critical systems like refrigeration, HVAC, and lighting. The company enhances energy management by categorizing and prioritizing activities related to energy use while offering basic and advanced analytics, reporting programs, and total energy savings services. By leveraging specialized sensor technology and data extraction techniques, OutSmart delivers granular monitoring capabilities that improve operational efficiency and reduce energy costs, often achieving payback periods of less than a year for its clients.

Exterra Carbon Solutions

Exterra is a technology company focused on developing solutions for durable CO2 storage using mineral waste. Its proprietary technologies enable the production of low-carbon oxides and critical minerals from ores and mine tailings, integrating into mineral processing operations to reduce costs and facilitate decarbonization.
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