Decarbonization Partners

Decarbonization Partners specializes in investing in late-stage venture capital and early-stage growth equity firms that focus on proven technologies within clean energy, electrification, green materials, and a circular, digital economy. The company is actively investing in six key areas and has already made five successful investments.

David Hayes

Managing Director

10 past transactions

Orennia

Series C in 2025
Orennia specializes in providing commercial analytics and insights tailored for the renewable and zero-carbon energy sectors. By leveraging advanced technology, the company aggregates and cleanses extensive data related to commercial, engineering, pricing, transmission facilities, and demand. This comprehensive approach allows Orennia to deliver objective insights, empowering investors to make informed capital allocation decisions. With expertise from seasoned industry professionals, Orennia aims to accelerate the investment process in renewable energy, enabling clients to navigate this significant market opportunity with confidence.

ConnectDER

Series D in 2024
ConnectDER LLC is a solar technology company based in Philadelphia, Pennsylvania, specializing in solutions that facilitate the connection of distributed energy resources, particularly solar photovoltaic systems, to residential homes and the grid. The company designs and manufactures innovative meter collars that serve as a connection point between residential electric meters and meter sockets, effectively transforming these sockets into a grid-friendly platform for solar energy, battery storage, and electric vehicle charging. Additionally, ConnectDER offers ConnectDER Cloud, a system that allows fleet operators to access metering and operational data, manage firmware, and oversee the commissioning and decommissioning of ConnectDER units. Founded in 2011 and rebranded in 2015, ConnectDER aims to simplify the integration of renewable energy technologies, benefiting both users and the broader energy grid.

Monolith

Private Equity Round in 2024
Monolith Materials, Inc. is a manufacturer based in Lincoln, Nebraska, specializing in sustainable production methods. Founded in 2012, the company operates a process called methane pyrolysis to produce low-emission carbon black and hydrogen. This innovative approach utilizes renewable electricity rather than combustion, distinguishing Monolith's products in the market. In addition to carbon black, the company also generates hydrogen tail-gas, which serves as a co-product for power generation and industrial gas applications. Monolith Materials, Inc. previously operated under the name Boxer Industries, Inc. and rebranded in December 2014. The company has an additional office located in San Carlos, California.

Guidewheel

Series B in 2024
Guidewheel is a developer of an AI-powered factory operations platform that helps manufacturers enhance productivity and profitability across their operations. The platform utilizes a non-intrusive approach, similar to a smartwatch, to monitor machines by analyzing their electrical signals. This allows for real-time insights into machine performance, including operational speed, activity status, and early detection of potential issues. With the integration of additional sensors, Guidewheel’s technology offers increasing value related to profitability and sustainability. Founded at Stanford University, Guidewheel has already made strides with hundreds of manufacturers, achieving an average runtime improvement of 40%. The company aims to become the leading real-time intelligence platform for the world’s factories, contributing significantly to operational efficiency and addressing climate change challenges.

Neustark

Venture Round in 2024
Neustark focuses on creating zero-emissions concrete by capturing carbon dioxide emissions from the atmosphere and converting them into limestone, which serves as a sustainable substitute for cement and sand. In addition to this innovative approach, Neustark also offers environmental services that involve recycling construction waste into fresh concrete. The company decomposes concrete waste into its original components—carbonate powder and gravel—allowing clients to recycle materials effectively while reducing the environmental impact associated with concrete production. Through these methods, Neustark aims to contribute positively to the construction industry and address climate change.

Antora Energy

Series B in 2024
Antora Energy specializes in providing zero-carbon industrial heat and power solutions for heavy industries, offering a more reliable alternative to fossil fuels. The company develops innovative thermal batteries that utilize excess solar and wind electricity to heat blocks of carbon, creating a sustainable energy source. These thermal energy storage systems effectively convert heat energy into electric energy, facilitating the electrification of heavy industry. By enabling the integration of renewable resources into the electricity grid, Antora Energy aims to deliver convenient, sustainable, and reliable electricity while significantly reducing carbon emissions on a global scale.

Ascend Elements

Series D in 2023
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.

Carbon Direct

Venture Round in 2022
Carbon Direct is a New York-based company established in 2020, specializing in carbon management solutions. It offers an end-to-end platform enabling organizations to reduce and remove atmospheric carbon, aligning with their climate goals. The platform facilitates carbon credit creation, supply chain emission reduction, low-carbon procurement, and large-scale carbon credit and removal transactions. Additionally, Carbon Direct Capital Management, its investment arm, provides growth-stage funding to carbon management companies, prioritizing both climate impact and financial returns through a science-focused approach.

Monolith

Private Equity Round in 2022
Monolith Materials, Inc. is a manufacturer based in Lincoln, Nebraska, specializing in sustainable production methods. Founded in 2012, the company operates a process called methane pyrolysis to produce low-emission carbon black and hydrogen. This innovative approach utilizes renewable electricity rather than combustion, distinguishing Monolith's products in the market. In addition to carbon black, the company also generates hydrogen tail-gas, which serves as a co-product for power generation and industrial gas applications. Monolith Materials, Inc. previously operated under the name Boxer Industries, Inc. and rebranded in December 2014. The company has an additional office located in San Carlos, California.

Group14 Technologies

Series C in 2022
Group14 Technologies, Inc. is a leading manufacturer and supplier of advanced silicon battery technology, specializing in engineered carbon materials for energy storage solutions including electric vehicles and consumer electronics. Founded in 2015 and headquartered in Woodinville, Washington, the company collaborates with clients representing 95% of global battery production. Group14 develops innovative battery materials that enhance energy performance in lithium-ion systems, providing clients with significantly increased lithium capacity while ensuring safety and longevity. The company operates a joint venture in South Korea and is expanding its manufacturing capabilities worldwide to meet the growing demand for silicon battery materials, aiming to enable a future where all rechargeable devices are powered by advanced battery technology.
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