Google Commits $1 Billion to Form Energy to Power Data Center with 100 Hour Battery Technology

Massive iron-air battery project signals a turning point for long-duration energy storage startups

In a bold move that could reshape the future of clean energy storage, Google has reportedly committed nearly $1 billion to startup Form Energy for its groundbreaking 100-hour battery system. The deal marks a major milestone not just for renewable energy, but for the startup ecosystem itself.

The battery will power Google’s upcoming data center in Minnesota using a combination of wind, solar, and Form Energy’s unique iron-air technology. Unlike traditional batteries that last a few hours, this system can deliver 300 megawatts of electricity continuously for up to 100 hours, enough to keep power flowing for days.

Form Energy’s technology works in a surprisingly simple way. It uses iron and oxygen to create rust, releasing electricity in the process. When energy is needed, the system “breathes in” oxygen. When it recharges, the rust turns back into iron. This long-duration storage will help stabilize 1.4 gigawatts of wind and 200 megawatts of solar power connected to the project.

For years, Form Energy quietly worked on refining this technology and built a factory in West Virginia. However, it had not secured a major customer, until now. With Google’s large-scale order in place, CEO Mateo Jaramillo confirmed the company is raising an additional $500 million. Having already raised $1.4 billion, the startup now plans to go public next year.

For the startup world, this is more than a funding headline, it’s proof that breakthrough climate technology can attract billion-dollar confidence.