Project Finance Brief: Flatiron Energy Secures $540 Million for 800 MWh Storage Project

GridStor acquires 100 MW/400 MWh White Tank battery energy storage project

September 24, 2025

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Flatiron Energy, a developer of utility-scale energy storage projects, secured approximately $540 million in financing from a group of financial institutions to support the construction and operation of the Taft Project. Taft is a 200 MW/800 MWh battery energy storage project located in Uxbridge, Massachusetts. The project is expected to begin commercial operation in late 2026.

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