Executive Summary
Form Energy closed a $750 million Series G funding round for its 100-hour iron-air battery systems. The capital will fund expanded manufacturing capacity to deliver multi-day energy storage systems designed for grid-scale and behind-the-meter applications. This marks a critical inflection point for long-duration energy storage in AI infrastructure and data center power markets.
The Players
Form Energy is commercializing iron-air battery technology capable of storing electricity for 100+ hours at costs competitive with natural gas peaking plants. Google, a hyperscaler with aggressive AI infrastructure buildout goals, and Crusoe Energy, a crypto miner and AI compute provider known for stranded gas monetization, are both customers.
The Numbers
$750 million in new equity to expand its manufacturing capacity in West Virginia. Form’s systems are designed for utility-scale and large industrial deployments, typically in the tens to hundreds of megawatts.
So What — and What Should You Do With This?
This deal validates long-duration storage as a real procurement category for hyperscalers and energy-intensive AI workloads. Four-hour lithium-ion batteries can’t firm up a data center running 24/7 on intermittent renewables. Form’s 100-hour systems can. That changes the economics of pairing solar or wind with storage.
Source: TechCrunch, August 12, 2026.
