Form Energy Secures $750M Series G as Iron-Air Backlog Hits 80 GWh

Massive Capital Injection for Iron-Air Battery Pioneer

Form Energy, a leading developer of multi-day iron-air battery storage solutions, has successfully secured $750 million in a Series G financing round. The substantial funding round was led by T. Rowe Price and featured participation from a robust syndicate of prominent investors, including Sequoia Capital, Janus Henderson, Prelude Ventures, and Breakthrough Energy Ventures. This latest injection of capital brings the company's total equity funding to an impressive milestone of over $2 billion, reflecting strong market confidence in its ultra-long-duration technology.

Surging Commercial Backlog

The financial milestone is matched by extraordinary commercial traction. Form Energy's commercial backlog for its multi-day iron-air battery storage solutions has surged dramatically to 80 GWh. This represents a massive increase from the 20 GWh backlog reported earlier in 2026. Such exponential growth underscores the accelerating global demand for long-duration energy storage capable of bridging multi-day renewable energy gaps.

This backlog expansion is heavily driven by strategic partnerships with major energy consumers and developers. Key collaborators include Xcel Energy, Google, and FuturEnergy Ireland. These partnerships highlight a growing recognition among tech giants and utility providers that multi-day storage is essential for achieving 100% renewable energy grids and ensuring grid resilience during prolonged periods of low renewable generation.

Form Energy's commercial backlog for its multi-day iron-air battery storage solutions has surged to 80 GWh, up from 20 GWh earlier in 2026.

Scaling Manufacturing Capabilities

The proceeds from the $750 million Series G round are earmarked for aggressive expansion. Specifically, the funds will be utilized to scale up manufacturing at the company's flagship facility in Weirton, West Virginia. By ramping up domestic production, Form Energy aims to meet its surging backlog, reduce supply chain bottlenecks, and accelerate the deployment of its iron-air systems across the United States and international markets. This strategic scaling is expected to drive down costs through economies of scale, further enhancing the commercial viability of multi-day energy storage.

This article was assisted by AI analysis. Please refer to the original source for official information.