Massachusetts Clean Energy Center

The Massachusetts Clean Energy Center (MassCEC) is a state agency established to promote the growth of the clean energy sector in Massachusetts. Founded in 2009 under the Green Jobs Act, MassCEC focuses on accelerating job creation and economic development within the clean energy industry. The organization provides early-stage investments to startups, offers renewable energy rebates for residents and businesses, and supports workforce development initiatives to prepare individuals for careers in clean energy. By leveraging the state's unique assets, MassCEC aims to facilitate the development of renewable energy projects and establish Massachusetts as a leader in the national and global clean energy landscape.

Stephen Pike

CEO

Emily Reichert

CEO

David Wilson

Senior Investment Associate

Past deals in Energy Storage

BlueShift

Pre Seed Round in 2025
BlueShift is a climate technology company that specializes in electrochemical processes. It develops systems to capture carbon dioxide directly from the ocean and convert industrial waste into valuable minerals, such as nickel and carbonates. This process not only provides sustainable sources for these materials but also significantly reduces atmospheric carbon, contributing to climate change mitigation.

Lithios

Seed Round in 2024
Lithios is a technology company specializing in advanced lithium extraction through innovative electrochemical methods. The firm focuses on capturing and releasing lithium from complex mixtures, which are traditionally challenging to process. By leveraging breakthroughs in applied electrochemistry, Lithios offers solutions that facilitate low-cost and selective extraction of lithium from previously untapped brine resources. This approach not only enhances the efficiency of lithium recovery but also aligns with sustainable practices, supporting the growing demand for lithium in various industries, particularly in the context of an electric future.

Found Energy

Seed Round in 2024
Found Energy is a renewable energy company focused on transforming aluminum into a renewable energy carrier. The company specializes in recovering aluminum waste from landfills and employs a carbon-free process to generate hydrogen on demand, achieving production costs under $0.50 per kilogram. This process yields hydrogen with five times the volumetric energy density of liquid hydrogen, making it a viable alternative to fossil fuels. By providing a sustainable energy solution, Found Energy aims to support heavy industries in their transition to renewable energy sources while maintaining competitive pricing and energy efficiency.

Blaze Power

Grant in 2023
Blaze Power operates as a lithium-ion battery materials manufacturer. It innovates and commercializes iron-based cathode materials to enable mass-market electrification in transportation and energy storage. The company is driven to industrialize these cathodes in purpose-built inflation reduction act-compliant facilities.

BlocPower

Grant in 2023
BlocPower is an energy technology startup based in Los Angeles, California, focused on creating healthier, greener, and smarter buildings. Founded in 2014 in Brooklyn, New York, by Donnel Baird and Morris Cox, the company specializes in retrofitting urban buildings with advanced energy efficiency technologies and green heating and cooling systems. BlocPower identifies energy-wasting buildings and utilizes a proprietary machine learning platform to determine the most effective retrofits for maximizing energy savings. The company connects various stakeholders, including government agencies, utilities, building owners, and equipment providers, to facilitate these upgrades. With a mission to serve financially underserved communities, BlocPower has completed projects in nearly 1,000 buildings, helping customers save 20–40% on their annual energy bills. By leveraging data and innovative financing, BlocPower aims to reduce carbon emissions and improve health outcomes while addressing the climate crisis.

Feon

Grant in 2023
Feon develops new-molecule-based liquid electrolytes for lithium-ion and lithium-metal batteries.

Nth Cycle

Grant in 2021
Nth Cycle is a metal processing technology company that focuses on recovering critical minerals through innovative electro-extraction methods. It collaborates with battery recyclers and mining operations to extract production-grade minerals from e-waste and low-grade mine tailings, offering a cleaner and more customizable alternative to traditional hydrometallurgical and pyrometallurgical processes. By utilizing its advanced recycling technology, Nth Cycle aims to reduce reliance on primary mining, thereby creating a sustainable secondary source of rare earth metals in the United States. This approach supports the manufacturing and recycling industries while contributing to advancements in clean energy.

Takachar

Grant in 2021
Takachar is focused on creating a network of waste management enterprises in Kenya that convert agricultural residues into eco-friendly charcoal, providing an affordable cooking fuel for low-income households. The company has developed low-cost technologies that can be locally manufactured and have been successfully tested in Kenya over the past three years. Since its inception, Takachar has assisted in establishing seven local waste-to-charcoal enterprises, some of which have achieved operational profitability. To date, Takachar has created approximately 100 jobs and sold 50 tons of eco-char. The company aims to demonstrate the long-term financial sustainability of these enterprises, with the intention of developing a franchise network in the future. Additionally, Takachar employs oxygen-lean torrefaction reactors to transform biomass into commercially viable products, helping farmers prevent the open burning of agricultural waste while providing them with opportunities to generate extra income through value-added chemicals.

SYSO Technologies

Grant in 2021
SYSO Technologies specializes in renewable energy and storage management technology and services. The company has developed a cloud-based platform aimed at enhancing the performance of renewable energy assets. By integrating artificial intelligence with a product-agnostic server, the platform enables asset owners to transform passive renewable generators, such as photovoltaics and wind power, into active energy producers. This approach allows asset owners to maximize the value of their investments by increasing revenue, reducing operational costs, and improving the reliability of their energy systems. SYSO Technologies focuses on providing comprehensive solutions that support the effective management of renewable energy and storage assets.

Heila Technologies

Seed Round in 2020
Heila Technologies develops a platform that connects solar arrays, batteries, and other distributed energy resources (DERs) to create self-managing microgrids. The Heila IQ Platform is a decentralized optimization system that simplifies the integration and operation of these resources, allowing for autonomous management and optimization. This technology transforms various components, such as batteries and solar arrays, into independent intelligent agents capable of self-organization and regulation. Heila Technologies serves a diverse clientele, including utility representatives, developers, energy users, and public officials. Founded in 2017 and based in Somerville, Massachusetts, the company aims to facilitate the commercialization of its platform, providing granular analysis and data-driven recommendations to enhance the resilience and efficiency of energy networks while promoting energy savings and reducing carbon emissions.

EnergySage

Grant in 2020
EnergySage, LLC is an online marketplace based in Boston, Massachusetts, specializing in solar and clean energy technologies for homeowners, businesses, and non-profits. Founded in 2009, the company provides a platform that offers educational resources and analytical tools, helping consumers identify and compare suitable clean energy solutions, including rooftop solar, battery storage, community solar, heat pumps, and electric vehicle charging. Through its service, EnergySage guides potential buyers in requesting and evaluating competitive quotes from pre-screened installers, facilitating a convenient and cost-effective shopping experience for clean energy products and services.

Blackburn Energy

Grant in 2020
Blackburn Energy, Inc. specializes in renewable energy solutions for the commercial trucking industry through its innovative product, RelGen. This technology harnesses kinetic energy from a truck's drive shaft, converting it into electricity via a custom alternator. The generated power is stored in a battery array, enabling it to supply energy to various truck subsystems including liftgates, electric auxiliary power units (APUs), and sensors for driver-assist and autonomous features. Blackburn Energy's solutions aim to reduce reliance on engine idling, thus cutting fuel and maintenance costs while minimizing carbon emissions. The company's products are particularly beneficial for long-haul drivers, providing essential power for climate control and operational needs during rest periods. Blackburn Energy was founded in 2008 and is headquartered in Amesbury, Massachusetts.

FLxDER

Grant in 2020
FLxDER creates a prototype of its cloud-based software to optimize electric fleet vehicle charging so as to reduce electric grid impacts and costs, and coordinate operation with other distributed energy resources.

Titan Advanced Energy Solutions

Grant in 2020
Titan Advanced Energy Solutions specializes in developing advanced battery management systems for lithium-ion batteries, leveraging patented ultrasound technology to enhance battery performance. Their flagship product, ionView, delivers over 99% accuracy in state-of-health and state-of-charge assessments, which leads to a minimum 20% increase in charge capacity and a 125% extension of battery life. The systems also offer real-time monitoring, safety controls, and cell-level balancing. Titan's solutions cater to a diverse range of industries, including automotive, energy storage, mobile devices, and battery manufacturing, ultimately supporting the electrification and decarbonization efforts for a sustainable future. Founded in 2016 and located in Somerville, Massachusetts, the company was previously known as Titan Energy Analytics.

SYSO Technologies

Grant in 2020
SYSO Technologies specializes in renewable energy and storage management technology and services. The company has developed a cloud-based platform aimed at enhancing the performance of renewable energy assets. By integrating artificial intelligence with a product-agnostic server, the platform enables asset owners to transform passive renewable generators, such as photovoltaics and wind power, into active energy producers. This approach allows asset owners to maximize the value of their investments by increasing revenue, reducing operational costs, and improving the reliability of their energy systems. SYSO Technologies focuses on providing comprehensive solutions that support the effective management of renewable energy and storage assets.

Lydian Labs

Grant in 2020
Lydian Labs manufactures renewable energy equipment from industrial plants, landfills or directly from air.

Titan Advanced Energy Solutions

Series A in 2019
Titan Advanced Energy Solutions specializes in developing advanced battery management systems for lithium-ion batteries, leveraging patented ultrasound technology to enhance battery performance. Their flagship product, ionView, delivers over 99% accuracy in state-of-health and state-of-charge assessments, which leads to a minimum 20% increase in charge capacity and a 125% extension of battery life. The systems also offer real-time monitoring, safety controls, and cell-level balancing. Titan's solutions cater to a diverse range of industries, including automotive, energy storage, mobile devices, and battery manufacturing, ultimately supporting the electrification and decarbonization efforts for a sustainable future. Founded in 2016 and located in Somerville, Massachusetts, the company was previously known as Titan Energy Analytics.

Blackburn Energy

Grant in 2019
Blackburn Energy, Inc. specializes in renewable energy solutions for the commercial trucking industry through its innovative product, RelGen. This technology harnesses kinetic energy from a truck's drive shaft, converting it into electricity via a custom alternator. The generated power is stored in a battery array, enabling it to supply energy to various truck subsystems including liftgates, electric auxiliary power units (APUs), and sensors for driver-assist and autonomous features. Blackburn Energy's solutions aim to reduce reliance on engine idling, thus cutting fuel and maintenance costs while minimizing carbon emissions. The company's products are particularly beneficial for long-haul drivers, providing essential power for climate control and operational needs during rest periods. Blackburn Energy was founded in 2008 and is headquartered in Amesbury, Massachusetts.

Titan Advanced Energy Solutions

Grant in 2019
Titan Advanced Energy Solutions specializes in developing advanced battery management systems for lithium-ion batteries, leveraging patented ultrasound technology to enhance battery performance. Their flagship product, ionView, delivers over 99% accuracy in state-of-health and state-of-charge assessments, which leads to a minimum 20% increase in charge capacity and a 125% extension of battery life. The systems also offer real-time monitoring, safety controls, and cell-level balancing. Titan's solutions cater to a diverse range of industries, including automotive, energy storage, mobile devices, and battery manufacturing, ultimately supporting the electrification and decarbonization efforts for a sustainable future. Founded in 2016 and located in Somerville, Massachusetts, the company was previously known as Titan Energy Analytics.

Ascend Elements

Grant in 2019
Ascend Elements is a manufacturer of advanced battery materials, specializing in the reclamation of valuable elements from spent lithium-ion batteries. The company employs hydroprocess recycling and direct recycling techniques to deconstruct old cathode materials to the atomic level, allowing for the creation of new cathode materials. This innovative approach not only facilitates the recycling of battery components but also supports clients in maximizing their returns on investments, promoting the economic viability of recycling and the production of low-cost battery materials.

Heila Technologies

Grant in 2019
Heila Technologies develops a platform that connects solar arrays, batteries, and other distributed energy resources (DERs) to create self-managing microgrids. The Heila IQ Platform is a decentralized optimization system that simplifies the integration and operation of these resources, allowing for autonomous management and optimization. This technology transforms various components, such as batteries and solar arrays, into independent intelligent agents capable of self-organization and regulation. Heila Technologies serves a diverse clientele, including utility representatives, developers, energy users, and public officials. Founded in 2017 and based in Somerville, Massachusetts, the company aims to facilitate the commercialization of its platform, providing granular analysis and data-driven recommendations to enhance the resilience and efficiency of energy networks while promoting energy savings and reducing carbon emissions.

Idle Smart

Series A in 2018
Idle Smart, LLC, established in 2011 and headquartered in Kansas City, Kansas, with a presence in Lenox, Massachusetts, specializes in providing solutions for commercial vehicle fleets. The company's core product is Idle Smart, an automated engine start-stop system designed to minimize overnight idle time, thereby reducing fuel consumption and emissions. This solution is particularly suited for day cabs, electric auxiliary power units (APUs), and school buses operating in the United States and Canada. Idle Smart's platform also offers remote management features, including battery and coolant temperature monitoring, automated engine running, and real-time performance analysis, ensuring fleet uptime and optimizing overall performance.

Takachar

Grant in 2018
Takachar is focused on creating a network of waste management enterprises in Kenya that convert agricultural residues into eco-friendly charcoal, providing an affordable cooking fuel for low-income households. The company has developed low-cost technologies that can be locally manufactured and have been successfully tested in Kenya over the past three years. Since its inception, Takachar has assisted in establishing seven local waste-to-charcoal enterprises, some of which have achieved operational profitability. To date, Takachar has created approximately 100 jobs and sold 50 tons of eco-char. The company aims to demonstrate the long-term financial sustainability of these enterprises, with the intention of developing a franchise network in the future. Additionally, Takachar employs oxygen-lean torrefaction reactors to transform biomass into commercially viable products, helping farmers prevent the open burning of agricultural waste while providing them with opportunities to generate extra income through value-added chemicals.

EnergySage

Series A in 2018
EnergySage, LLC is an online marketplace based in Boston, Massachusetts, specializing in solar and clean energy technologies for homeowners, businesses, and non-profits. Founded in 2009, the company provides a platform that offers educational resources and analytical tools, helping consumers identify and compare suitable clean energy solutions, including rooftop solar, battery storage, community solar, heat pumps, and electric vehicle charging. Through its service, EnergySage guides potential buyers in requesting and evaluating competitive quotes from pre-screened installers, facilitating a convenient and cost-effective shopping experience for clean energy products and services.

Titan Advanced Energy Solutions

Grant in 2018
Titan Advanced Energy Solutions specializes in developing advanced battery management systems for lithium-ion batteries, leveraging patented ultrasound technology to enhance battery performance. Their flagship product, ionView, delivers over 99% accuracy in state-of-health and state-of-charge assessments, which leads to a minimum 20% increase in charge capacity and a 125% extension of battery life. The systems also offer real-time monitoring, safety controls, and cell-level balancing. Titan's solutions cater to a diverse range of industries, including automotive, energy storage, mobile devices, and battery manufacturing, ultimately supporting the electrification and decarbonization efforts for a sustainable future. Founded in 2016 and located in Somerville, Massachusetts, the company was previously known as Titan Energy Analytics.

Sunrun

Grant in 2017
Sunrun Inc. is a leading provider of residential solar energy systems in the United States, specializing in the design, development, installation, ownership, and maintenance of solar power solutions. Founded in 2007 and headquartered in San Francisco, California, the company offers a unique solar service model that allows homeowners to pay for the electricity generated by the solar systems rather than purchasing the panels outright. This approach enables customers to benefit from lower, locked-in electricity rates while Sunrun maintains and monitors the systems. Operating in twelve states, Sunrun installs solar systems at a rapid pace, averaging one installation every ten minutes. The company utilizes a direct-to-consumer marketing strategy complemented by partnerships with various solar and strategic entities. In addition to solar energy systems, Sunrun also provides battery storage solutions and sells solar products such as panels and racking. With a workforce of over 3,000 employees, Sunrun continues to lead the residential solar market by prioritizing customer savings and sustainable energy solutions.

Advanced Microgrid Solutions

Grant in 2017
Advanced Microgrid Solutions (AMS) specializes in designing, installing, and managing advanced energy storage systems for commercial, industrial, and government buildings. Based in San Francisco with offices across the U.S., AMS deploys large networks of battery systems in buildings to lower energy costs for consumers and support the electric grid. The company's AI-powered software, SigmaOne, optimizes energy trading and maximizes the value of renewables and energy storage assets. AMS also offers microgrid solutions, enabling clean energy access for households, businesses, and communities. Founded in 2013, AMS operates as a subsidiary of Fluence.

Ameresco

Grant in 2017
Ameresco, Inc. is an energy efficiency solutions provider operating primarily in North America and Europe. Founded in 2000 and headquartered in Framingham, Massachusetts, the company specializes in the development, design, engineering, and installation of projects that aim to reduce energy consumption and operational costs for various sectors, including governmental, educational, utility, healthcare, commercial, and industrial facilities. Ameresco's services encompass upgrades to energy infrastructure and the construction of renewable energy plants that generate electricity, gas, heat, or cooling from sustainable sources. Additionally, the company offers a range of solar energy products and systems, including photovoltaic panels, inverters, solar-powered lighting, and other essential components for both grid-connected and off-grid applications. Through its initiatives, Ameresco supports clients in achieving greater energy efficiency and sustainability.

National Grid

Grant in 2017
National Grid is a multinational electricity and gas utility company, headquartered in London, UK. It owns, operates, and maintains high-pressure gas transmission networks in Great Britain, spanning approximately 7,630 kilometers, and provides associated services such as gas metering and liquefied natural gas storage. Additionally, it facilitates electricity and gas transmission systems, serving millions of customers through regulated utility businesses in the UK and US. National Grid is committed to delivering safe, reliable, and efficient energy, while also investing in innovative technologies to reduce greenhouse gas emissions and transition to cleaner, smarter energy systems.

NextEra Energy

Grant in 2017
NextEra Energy is a leading renewable energy company that generates power from wind and solar sources. It owns and operates contracted clean energy projects in North America, including wind and solar projects, and natural gas infrastructure assets in Texas. The company's renewable energy projects are strategically located in regions favorable for wind and solar energy generation, and they are fully contracted, ensuring stable, long-term cash flows. NextEra Energy also owns a regulated utility, Florida Power & Light, which distributes power to nearly 6 million customer accounts in Florida and contributes significantly to the company's operating earnings. The company's renewable energy segment, NextEra Energy Resources, generates and sells power throughout the United States and Canada, with a diverse portfolio of generation capacity including natural gas, nuclear, wind, and solar.

Tesla

Grant in 2017
Tesla, Inc., established in 2003, is a leading innovator in the electric vehicle (EV) industry, headquartered in Palo Alto, California. The company designs, manufactures, and sells a range of electric vehicles, including luxury and midsize sedans, crossover SUVs, a light truck, and a semi-truck. Tesla's mission is to accelerate the world's transition to sustainable energy, offering an expanding lineup of increasingly affordable electric cars. The company operates through two segments: Automotive, which focuses on EV production, powertrain components, and services, and Energy Generation and Storage, which provides rechargeable battery systems, solar energy generation, and energy storage products for residential, commercial, and utility-scale applications. Tesla markets its products through company-owned stores, galleries, and its official website, and supports them with a network of service centers and mobile technicians. Additionally, Tesla operates a fast-charging network for EV owners.

Ivys Energy Solutions

Grant in 2017
Ivys Energy Solutions is a provider of engineering services and products focused on the global energy and renewable sectors. The company specializes in developing hydrogen-based fueling systems that deliver sustainable energy solutions. These systems are designed to provide clean, cost-effective, and reliable energy, thereby enabling clients to transition to cleaner vehicles. Through its innovative approach, Ivys Energy Solutions aims to contribute to the advancement of sustainable energy practices in the industry.

Wattjoule

Grant in 2017
WattJoule is a company focused on creating a liquid electrical energy storage system. It develops an energy storage center that integrates power production and energy storage in a single package. This system comprises two main components: an energy conversion module that includes converter stacks, pumps, sensors, and controls, and an energy storage module designed for tank assembly. This innovative approach allows clients to achieve higher power levels, positioning WattJoule as a key player in the energy storage sector.

Greentown Labs

Grant in 2016
Greentown Labs, Inc. is a climate technology incubator founded in 2011 and located in Somerville, Massachusetts. The company provides co-located prototyping, office, and event spaces specifically designed for businesses in the clean technology, energy, and environmental sectors. Its mission is to foster a vibrant community of entrepreneurs by offering the necessary resources and support to help early-stage companies thrive. By creating shared warehouse spaces and facilitating collaboration, Greentown Labs aims to enable innovative solutions that address pressing climate challenges.

Tank Utility

Grant in 2015
Tank Utility, Inc. specializes in developing software solutions for the fuel and energy sector, focusing on enhancing operational efficiency for fuel distribution companies. Founded in 2014 and based in Boston, Massachusetts, the company offers smart meters and cloud-based software that integrates wireless sensors to monitor propane levels in real time. By utilizing IoT technology and business intelligence software, Tank Utility enables fuel providers to reduce unnecessary delivery miles, thereby minimizing waste and improving customer engagement. Their products include easy-to-install wireless tank monitors and web applications that deliver real-time data on tank levels, usage, and pricing, ultimately enhancing service efficiency and customer retention. Additionally, Tank Utility provides installation and support services to ensure optimal utilization of its solutions.

EnergySage

Series A in 2015
EnergySage, LLC is an online marketplace based in Boston, Massachusetts, specializing in solar and clean energy technologies for homeowners, businesses, and non-profits. Founded in 2009, the company provides a platform that offers educational resources and analytical tools, helping consumers identify and compare suitable clean energy solutions, including rooftop solar, battery storage, community solar, heat pumps, and electric vehicle charging. Through its service, EnergySage guides potential buyers in requesting and evaluating competitive quotes from pre-screened installers, facilitating a convenient and cost-effective shopping experience for clean energy products and services.

Blackburn Energy

Grant in 2015
Blackburn Energy, Inc. specializes in renewable energy solutions for the commercial trucking industry through its innovative product, RelGen. This technology harnesses kinetic energy from a truck's drive shaft, converting it into electricity via a custom alternator. The generated power is stored in a battery array, enabling it to supply energy to various truck subsystems including liftgates, electric auxiliary power units (APUs), and sensors for driver-assist and autonomous features. Blackburn Energy's solutions aim to reduce reliance on engine idling, thus cutting fuel and maintenance costs while minimizing carbon emissions. The company's products are particularly beneficial for long-haul drivers, providing essential power for climate control and operational needs during rest periods. Blackburn Energy was founded in 2008 and is headquartered in Amesbury, Massachusetts.

Xilectric

Grant in 2015
Xilectric specializes in the development of energy and environmental technologies, particularly in the field of lithium-ion battery innovation. The company manufactures rechargeable batteries designed to enhance abuse tolerance, enabling them to withstand high voltage, elevated temperatures, and rapid charging. Xilectric also offers a novel class of low-cost rechargeable batteries based on nickel-iron technology, which minimizes electrolyte degradation and ensures reliable performance in extreme weather conditions. This advancement provides electric vehicle manufacturers with durable and dependable battery solutions, addressing the growing demand for efficient energy storage in the automotive sector.

Greentown Labs

Grant in 2014
Greentown Labs, Inc. is a climate technology incubator founded in 2011 and located in Somerville, Massachusetts. The company provides co-located prototyping, office, and event spaces specifically designed for businesses in the clean technology, energy, and environmental sectors. Its mission is to foster a vibrant community of entrepreneurs by offering the necessary resources and support to help early-stage companies thrive. By creating shared warehouse spaces and facilitating collaboration, Greentown Labs aims to enable innovative solutions that address pressing climate challenges.

Nuvera Fuel Cells

Grant in 2014
Nuvera Fuel Cells, LLC specializes in manufacturing heavy-duty, zero-emissions engines tailored for mobility applications. The company operates facilities in both the United States and Europe, focusing on clean and efficient fuel cell technology. Nuvera's products serve a diverse range of markets, including on- and off-road vehicles, industrial equipment, port and maritime applications, as well as stationary and portable power solutions. By addressing the demanding requirements of these sectors, Nuvera enables its clients to meet global commercial standards for sustainability and efficiency.

Sparkplug Power

Grant in 2014
Sparkplug Power is a developer and manufacturer of energy storage equipment, focusing on renewable energy solutions. The company specializes in providing project development and services for energy storage installations, aiming to help commercial and institutional customers reduce their electricity costs. By offering energy storage as a service, Sparkplug Power enables clients to optimize their energy usage and achieve cost savings through effective energy management.

Greentown Labs

Grant in 2013
Greentown Labs, Inc. is a climate technology incubator founded in 2011 and located in Somerville, Massachusetts. The company provides co-located prototyping, office, and event spaces specifically designed for businesses in the clean technology, energy, and environmental sectors. Its mission is to foster a vibrant community of entrepreneurs by offering the necessary resources and support to help early-stage companies thrive. By creating shared warehouse spaces and facilitating collaboration, Greentown Labs aims to enable innovative solutions that address pressing climate challenges.

Bandgap Engineering

Grant in 2013
Bandgap Engineering specializes in the development of advanced nanostructuring technologies for silicon, focusing on applications in high-efficiency photovoltaic systems and lithium-ion batteries. The company aims to enhance the performance of silicon-based solar cells and battery technologies by employing innovative methods that lower production costs and improve efficiency. By engineering these nanostructured materials, Bandgap Engineering seeks to contribute to the advancement of solar energy solutions and the broader adoption of renewable energy technologies, ultimately supporting the goal of making solar energy competitive with traditional energy sources.

Spruce Power

Grant in 2013
Spruce Power is a U.S.-based company that owns and operates distributed solar energy assets. It provides subscription-based services, making renewable energy accessible to over 52,000 customers nationwide. Spruce generates revenue primarily through selling electricity generated by its home solar systems to customers, third-party contracts for solar renewable energy credits (SRECs), and servicing these agreements.

Ambri

Grant in 2013
Ambri, Inc. is a company based in Marlborough, Massachusetts, focused on developing innovative electricity storage solutions through its liquid metal battery technology. Founded in 2010 and originally known as Liquid Metal Battery Corporation, Ambri aims to revolutionize grid-scale power storage by offering batteries that are low-cost, long-lasting, and capable of storing significant amounts of energy. These batteries are particularly suited for applications in renewable energy systems and grid stabilization. Ambri's technology is designed to enhance the reliability and efficiency of energy storage, with systems that can tolerate short circuits and other operational challenges, making them a robust choice for grid operators.

Vecarius

Grant in 2013
Vecarius is an energy efficiency in mass markets with broad societal impact, particularly in markets involving energy-intensive mobile or portable applications. They offer power management systems, thermal management systems, power electronics, advanced heat exchangers, and waste heat recovery.

Thermeleon

Grant in 2012
Thermeleon specializes in energy-efficient greenhouse solutions. Their core product is a next-generation screening system that passively cools and heats greenhouses. This system integrates thermal energy storage, absorbing excess heat during the day and releasing it at night, significantly reducing both gas costs and CO2 emissions.

Takachar

Grant in 2012
Takachar is focused on creating a network of waste management enterprises in Kenya that convert agricultural residues into eco-friendly charcoal, providing an affordable cooking fuel for low-income households. The company has developed low-cost technologies that can be locally manufactured and have been successfully tested in Kenya over the past three years. Since its inception, Takachar has assisted in establishing seven local waste-to-charcoal enterprises, some of which have achieved operational profitability. To date, Takachar has created approximately 100 jobs and sold 50 tons of eco-char. The company aims to demonstrate the long-term financial sustainability of these enterprises, with the intention of developing a franchise network in the future. Additionally, Takachar employs oxygen-lean torrefaction reactors to transform biomass into commercially viable products, helping farmers prevent the open burning of agricultural waste while providing them with opportunities to generate extra income through value-added chemicals.

SES

Grant in 2012
SolidEnergy Systems Corp. develops and manufactures rechargeable lithium metal batteries primarily for applications in drones, wearables, smartphones, and electric vehicles. Founded in 2012 and based in Woburn, Massachusetts, the company focuses on producing high-performance lithium metal batteries and supplying essential materials, such as anodes and electrolytes, to major lithium-ion cell manufacturers. These materials can be integrated into existing manufacturing processes, allowing for scalability without significant infrastructure investments. SolidEnergy's pilot-scale production caters to prototype demonstrations and specialized aerospace markets, while its future growth is aimed at mainstream sectors like consumer electronics and electric vehicles. Additionally, the company is involved in developing AI-powered safety algorithms and recycling solutions, positioning itself as an integrated battery manufacturer with a commitment to innovation and sustainability.

WindPole Ventures

Series A in 2010
WindPole sells actual hub height wind resource data that solves two problems: 1) historical wind data that de-risks and improves finance terms for wind power development projects, and 2) real-time data based wind forecasting that improves operational effectiveness for utilities, grid operators, wind farm operators, and power traders. WindPole installs weather monitoring sensors and systems on existing narrow faced, 80+ meters (hub height), broadcast towers. Each tower is polled every five minutes to compile real-time wind resource data. WindPole’s clients include five of the top ten wind developers, grid operators, and industry analysts.
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