# Form Energy iron-air battery production expansion

> Live situation record from CLSTR: https://clstr.news/situations/form-energy-iron-air-battery-production-expansion
> Updated: 2026-08-16T21:22:42.000Z. Sources: 10. Developments: 2.

Form Energy, a U.S.-based energy storage startup, has secured $750 million in Series G funding to expand the manufacturing of its iron-air battery technology in West Virginia. The funding round was led by T. Rowe Price, with participation from investors including Sequoia Capital, Franklin Templeton, and Breakthrough Energy Ventures.

The company’s technology utilizes a reversible oxidation process to provide long-duration energy storage for up to 100 hours, aiming to mitigate the intermittency of renewable energy. This expansion is intended to address a growing commercial backlog, which has risen from 20 gigawatt-hours to 80 gigawatt-hours. 

Demand is being driven significantly by the electricity needs of data centers, particularly those supporting AI workloads. Notable interest includes Google, which plans to use a 300 megawatt/30 gigawatt-hour system for a Minnesota data center, and AI infrastructure specialist Crusoe. To mitigate supply-chain volatility, the company noted that approximately 80 percent of its components are sourced within the United States.

## Claims

- Form Energy secured $750 million in Series G financing. (corroborated by 3 sources)
- T. Rowe Price led the Series G financing round. (corroborated by 3 sources)
- The company's total equity raised to date exceeds $2 billion. (corroborated by 2 sources)
- The company is developing iron-air batteries capable of providing more than 100 hours of discharge. (corroborated by 2 sources)
- The company's commercial backlog has grown from 20 gigawatt-hours to 80 gigawatt-hours. (corroborated by 2 sources)
- The funds will be used to expand manufacturing at a facility in Weirton, West Virginia. (corroborated by 2 sources)
- Eighty percent of the materials required for the batteries are sourced from the United States. (single source)

## Timeline

### 2026-08-16: Form Energy secures $750M to expand iron-air battery manufacturing

Form Energy raised $750 million in Series G funding to expand its iron-air battery manufacturing in West Virginia, targeting long-duration energy storage for grids and data centers.

4 sources. https://clstr.news/cluster/form-energy-secures-750m-to-expand-iron-air-battery-manufacturing

### 2026-08-13: Form Energy raises $750 million for iron-air battery production

U.S. startup Form Energy raised $750 million to scale its iron-air battery production, offering up to 100 hours of energy storage to support renewable grids and AI data centers.

6 sources. https://clstr.news/cluster/form-energy-raises-750-million-for-iron-air-battery-production

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Cite as: Form Energy iron-air battery production expansion. CLSTR, https://clstr.news/situations/form-energy-iron-air-battery-production-expansion