AltEnergy

AltEnergy LLC is a private equity firm established in 2006, headquartered in Rowayton, Connecticut, with a regional office in New York City. The firm focuses on the alternative energy sector, aiming to facilitate the industry's growth and development. It typically invests between $5 million and $15 million in high-growth companies, with a broader interest in agricultural development and infrastructure sectors on a global scale. AltEnergy is dedicated to playing an active role in the emergence and advancement of sustainable energy solutions.

Jon Darnell

Managing Director

Jonathan Darnell

Managing Director

Arul Gupta

Managing Director

Russell M. Stidolph

Founder and Managing Director

3 past transactions

Eos

Post in 2023
Eos Energy Enterprises, Inc. specializes in the design, manufacture, and deployment of battery storage solutions tailored for the utility, commercial, and industrial sectors, as well as renewable energy markets in the United States. The company offers stationary battery storage systems, with its flagship product being the Eos Znyth DC battery system, specifically engineered to meet the demands of the grid-scale energy storage market. Founded in 2008 and headquartered in Edison, New Jersey, Eos aims to provide innovative and cost-effective energy storage solutions that enhance the reliability and competitiveness of renewable energy sources.

Viridity Energy

Venture Round in 2016
Viridity Energy, Inc. specializes in demand response, demand management, and battery storage solutions, primarily through its VPower software, which provides advanced algorithms for peak-shaving and maximizing cash revenue from load flexibility. The company's technology allows clients to interact effectively with wholesale electric power markets, enabling proactive and automated sales of energy capacity. Viridity Energy aims to transform the energy landscape by helping customers generate revenue from various energy markets and optimize their energy portfolios. Founded in 2008 and based in Philadelphia, Pennsylvania, Viridity Energy operates as a subsidiary of Ormat Technologies, Inc., and has established strategic partnerships with companies like GDF SUEZ Energy Resources NA and ConEdison Solutions.

Eos

Series C in 2015
Eos Energy Enterprises, Inc. specializes in the design, manufacture, and deployment of battery storage solutions tailored for the utility, commercial, and industrial sectors, as well as renewable energy markets in the United States. The company offers stationary battery storage systems, with its flagship product being the Eos Znyth DC battery system, specifically engineered to meet the demands of the grid-scale energy storage market. Founded in 2008 and headquartered in Edison, New Jersey, Eos aims to provide innovative and cost-effective energy storage solutions that enhance the reliability and competitiveness of renewable energy sources.
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