MCJ

Founded in 2019, MCJ is a venture capital firm based in Boston, Massachusetts. The company focuses on investing in technology startups that drive industrial transformation and infrastructure resilience, aiming to make industries cleaner, more profitable, and more resilient.

David Aronoff

Chairman and Managing Partner

Cody Simms

Managing Partner

Past deals in Energy

Exowatt

Series A in 2025
Exowatt is a next-generation renewable energy company that specializes in providing sustainable energy solutions for commercial and industrial applications. The company develops a modular full-stack energy system that consists of a heat collector, a heat battery, and a heat engine. This innovative system is designed to deliver dispatchable power and heat, ensuring that energy is consistently available to meet the demands of energy-intensive operations, such as data centers. By focusing on modularity and efficiency, Exowatt aims to enhance the accessibility and reliability of renewable energy, facilitating a transition towards more sustainable energy practices in various industries.

Fourier

Series A in 2025
Fourier specializes in developing modular, automated hydrogen production systems designed for on-site deployment. This eliminates the need for hydrogen transportation, making it universally accessible. Their innovative architecture contributes to a sustainable energy future by providing green hydrogen for industries such as transportation and power storage.

Moment Energy

Series A in 2025
Moment Energy specializes in battery energy storage systems that utilize repurposed electric vehicle batteries. Its solutions aim to provide clean, reliable, and cost-effective energy storage for both on-grid and off-grid applications.

Verse

Series A in 2024
Verse provides software for organizations to understand, plan, and manage clean energy. Its SaaS platform, Aria™, leverages generative AI to help companies define clean energy goals and plan, procure, and manage optimal portfolios of clean energy assets at least cost. Customers can set parameters that target specific goals (e.g., cost, emissions, or hourly matching) and optimize for annual matching, emissions matching, or hourly matched carbon-free energy (CFE). By reducing transaction costs by up to 70% and providing real-time analysis within minutes, Aria helps scale and accelerate the clean energy transition.

AirLoom Energy

Seed Round in 2023
AirLoom Energy develops wind energy technology that uses lightweight wings operating on a track to capture wind. The design aims to deliver the same amount of energy as conventional turbines at a fraction of the cost, enabling low-cost utility-scale wind energy. The system uses multiple small airframes on a slender oval track with downwind forces supported by a bridling system, and the configuration can be adjusted depending on the landscape, allowing clients to harvest wind energy in cost-effective and quicker ways.

Avalanche Energy

Series A in 2023
Avalanche Energy develops compact fusion reactors for distributed energy applications. Its modular reactor design enables clean energy production with high energy density, facilitating decarbonization efforts.

BlocPower

Series B in 2023
BlocPower designs and implements energy efficiency and electrification upgrades for urban buildings, including schools, churches, small businesses, non-profits, and homes. Through proprietary software, machine learning, and IoT-enabled monitoring, it analyzes facilities to identify cost-effective retrofits, combines financing and project management, and delivers scalable deployment that reduces energy waste and utility bills while enhancing indoor air quality and comfort.

Verse

Seed Round in 2022
Verse provides software for organizations to understand, plan, and manage clean energy. Its SaaS platform, Aria™, leverages generative AI to help companies define clean energy goals and plan, procure, and manage optimal portfolios of clean energy assets at least cost. Customers can set parameters that target specific goals (e.g., cost, emissions, or hourly matching) and optimize for annual matching, emissions matching, or hourly matched carbon-free energy (CFE). By reducing transaction costs by up to 70% and providing real-time analysis within minutes, Aria helps scale and accelerate the clean energy transition.

Enode

Series A in 2022
Enode is a technology company focused on facilitating the transition to a sustainable energy system by connecting and optimizing various energy devices. Its platform utilizes application programming interfaces (APIs) to enable seamless integration of energy products, such as electric vehicles, home batteries, solar inverters, and thermostats, into applications. This approach allows businesses to quickly connect users’ energy devices with minimal coding, significantly reducing the time and complexity associated with developing energy management applications. By streamlining the integration process, Enode helps clients optimize energy consumption and participate in flexible markets, contributing to the development of a zero-carbon energy grid.

Arcadia

Series E in 2022
Arcadia, Inc. is a technology company based in Washington, D.C., founded in 2014, that focuses on providing access to clean energy solutions. Through its platform, Arc, the company connects subscribers to renewable energy sources such as wind farms and community solar projects. By enabling users to manage their accounts, track energy usage, and participate in clean energy initiatives, Arcadia aims to democratize access to renewable energy and combat the fossil fuel monopoly. The platform aggregates energy data from over 125 utilities, representing more than 80% of U.S. electric utility accounts, thus facilitating a significant shift toward sustainable energy practices. Additionally, Arcadia's community solar program addresses energy injustice while promoting economic growth, contributing over five Terawatt-hours of energy demand from residential and commercial users.

Sense

Series C in 2022
Sense Labs, Inc. is a technology company based in Cambridge, Massachusetts, specializing in home energy monitoring solutions. Established in 2013, the company develops and manufactures electronic devices that analyze electricity usage in households. Its flagship product, Sense, utilizes current sensors installed on main breakers to capture the electronic signatures of various appliances. This system employs advanced algorithms to identify and differentiate individual devices, providing users with insights into their energy consumption. Sense also offers a range of related products, including Sense Solar, add-on sensors, and various replacement components. The data collected by these devices is transmitted to users via a dedicated mobile application, enhancing the home automation experience.

David Energy

Series A in 2022
David Energy is an innovative energy company that optimizes electricity consumption and management via advanced software and hardware solutions. It aims to reduce costs, increase renewable energy adoption, and enhance sustainability through smart energy management.

Moment Energy

Seed Round in 2021
Moment Energy specializes in battery energy storage systems that utilize repurposed electric vehicle batteries. Its solutions aim to provide clean, reliable, and cost-effective energy storage for both on-grid and off-grid applications.

Leap

Series B in 2021
Leap is a marketplace for Distributed Energy Resources to participate in the energy market. It allows every connected device to help balance the grid, and get paid for it and access wholesale markets through a single API and help build the flexible, renewable grid of the future. Leap aims to make global energy markets accessible to anyone, starting with demand response and expanding into generation and ancillary services. Leap was founded by Thomas Folker and Remco Van Den Elzen.

WattBuy

Series A in 2021
WattBuy is a technology company focused on providing households with access to cleaner and more affordable electricity. Headquartered in New York City, Washington D.C., and Seattle, the company comprises a team of product leaders and engineers with backgrounds from major tech firms. WattBuy has developed an electricity management platform that allows users to take control of their electricity consumption. Through a personalized recommendation engine, the platform helps residents select electricity plans tailored to their preferences and usage patterns, enabling them to save money and switch to the most cost-effective suppliers in their regions. The company's mission centers on leveraging technology to address energy inequality and contribute positively to climate change.

Energetic Capital

Series A in 2021
Energetic Insurance, Inc. is an InsurTech company based in Boston, Massachusetts, founded in 2016. It specializes in providing solar insurance solutions that address credit and counterparty risks associated with commercial and industrial solar photovoltaic projects. The company offers a product called EneRate, which protects third-party solar developers and asset owners from repayment risks and revenue losses due to defaults on power purchase agreements (PPAs). Energetic Insurance employs a data-driven approach as a Managing General Underwriter, developing innovative risk management products that facilitate solar financing for unrated or below investment grade organizations. This enables solar project developers to undertake more projects and access capital by mitigating payment default risks, thereby enhancing project economics through lower interest rates and improved financial structuring.

Arcadia

Series D in 2021
Arcadia, Inc. is a technology company based in Washington, D.C., founded in 2014, that focuses on providing access to clean energy solutions. Through its platform, Arc, the company connects subscribers to renewable energy sources such as wind farms and community solar projects. By enabling users to manage their accounts, track energy usage, and participate in clean energy initiatives, Arcadia aims to democratize access to renewable energy and combat the fossil fuel monopoly. The platform aggregates energy data from over 125 utilities, representing more than 80% of U.S. electric utility accounts, thus facilitating a significant shift toward sustainable energy practices. Additionally, Arcadia's community solar program addresses energy injustice while promoting economic growth, contributing over five Terawatt-hours of energy demand from residential and commercial users.

LevelTen Energy

Series C in 2021
LevelTen Energy is a Seattle-based company that operates a renewable energy transaction marketplace platform. Founded in 2016, it facilitates connections between corporate and industrial power buyers and utility-scale wind, solar, and storage projects. The platform enables these buyers to access power purchase agreements (PPAs), providing financial security through fixed-price renewables and the economic advantages of large-scale projects. LevelTen Energy equips renewable energy buyers, advisors, and sellers with tools and services to expedite better deals.

Enode

Seed Round in 2021
Enode is a technology company focused on facilitating the transition to a sustainable energy system by connecting and optimizing various energy devices. Its platform utilizes application programming interfaces (APIs) to enable seamless integration of energy products, such as electric vehicles, home batteries, solar inverters, and thermostats, into applications. This approach allows businesses to quickly connect users’ energy devices with minimal coding, significantly reducing the time and complexity associated with developing energy management applications. By streamlining the integration process, Enode helps clients optimize energy consumption and participate in flexible markets, contributing to the development of a zero-carbon energy grid.

David Energy

Seed Round in 2021
David Energy is an innovative energy company that optimizes electricity consumption and management via advanced software and hardware solutions. It aims to reduce costs, increase renewable energy adoption, and enhance sustainability through smart energy management.
Spot something off? Help us improve by flagging any incorrect or outdated information. Just email us at support@teaserclub.com. Your feedback is most welcome.