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

Arul Gupta

Managing Director

Russell Stidolph

Chairman and CEO

3 past transactions

Eos

Post in 2023
Eos develops innovative, low-cost energy storage solutions for the electric utility, solar, and C&I industries. Its battery solutions ensure renewables are as reliable and competitive as the market expects and sustainable as the world needs.

Viridity Energy

Venture Round in 2016
Viridity Energy, Inc. specializes in demand response, demand management, and battery storage solutions, aimed at helping commercial and industrial power users optimize their energy consumption and maximize financial returns. Founded in 2008 and based in Philadelphia, Pennsylvania, the company offers VPower, a software platform that utilizes peak-shaving algorithms and facilitates automated, real-time sales of load flexibility in wholesale electric power markets. By leveraging strategic partnerships with entities such as GDF SUEZ Energy Resources NA and ConEdison Solutions, Viridity Energy enables its clients to forecast market power prices and navigate the complexities of their energy asset portfolios. As of March 2017, Viridity operates as a subsidiary of Ormat Technologies, Inc.

Eos

Series C in 2015
Eos develops innovative, low-cost energy storage solutions for the electric utility, solar, and C&I industries. Its battery solutions ensure renewables are as reliable and competitive as the market expects and sustainable as the world needs.
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