Crusoe and Google-backed energy storage firm Form Energy has raised $750 million in Series G funding in order to expand manufacturing capacity at its West Virginia facility, in response to booming demand from the data center market.

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Form Energy is based in Somerville, Massachusetts, and is a developer of iron-air batteries. According to Form, its iron-air battery solution can deliver 100+ hours of storage and has no risk of thermal runaway, a key concern with lithium-ion batteries.