AltEnergy

Founded in 2006, AltEnergy is a private equity firm based in Rowayton, Connecticut. It specializes in the alternative energy sector, typically investing between $5 million and $15 million in high-growth companies.

Jon Darnell

Managing Director

Arul Gupta

Managing Director

Russell Stidolph

Founder and Managing Director

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. is a Philadelphia-based company that specializes in demand response, demand management, and battery storage solutions. Founded in 2008, it provides a software platform known as VPower, which employs peak-shaving algorithms and automated real-time sales to enhance cash revenue for commercial and industrial power users. The platform allows clients to optimize their energy profiles by forecasting market power prices and managing the complexity of their asset portfolios. Through strategic partnerships, Viridity Energy enables customers to engage more effectively with wholesale electric power markets, ultimately transforming energy usage into financial returns. As of March 2017, Viridity Energy 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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