A startup just built a battery factory on top of an old steel mill — and it might be the missing piece for clean energy that never sleeps.
Meet Form Energy.
Its product: a battery made from iron.
Yes, the same metal that rusts on your old bike.
Except here, rust isn't decay.
It's the entire business model.
Your phone battery lasts a day.
Grid batteries today? Even shorter — built to smooth out a few hours of solar dips.
But what happens when the sun disappears for three cloudy days straight?
That's the gap lithium-ion was never designed to cover.
Form Energy's iron-air battery steps in right there — charging up and then discharging steadily for 100 hours or more.
Not a replacement for lithium.
A tag team.
⚡ Lithium: fast bursts, short duration
🔋 Iron-air: slow burn, multi-day duration
Together, says CEO Mateo Jaramillo, they could do something wild — replace coal and gas as the grid's steady backbone, entirely.
Form Energy scanned 500 possible sites across 16 states.
It picked a 55-acre plot in Weirton — a town whose entire identity was built on steel.
A company built on rusting iron, rising from the ashes of a steel mill.
You can't script poetry like that.
The numbers behind it:
💸 $760 million total investment
🏛️ $290 million backed by West Virginia state financing
👷 750+ jobs once fully running
🏗️ Factory already expanding to 850,000 sq ft
Ground broke in May 2023, with Energy Secretary Jennifer Granholm and Senators Manchin and Capito on site.
Fast forward to now.
The plant is already producing — and commercial shipments are on track for early 2027.
By 2028, Form Energy wants 500 megawatts a year of these batteries rolling out the door.
And the batteries already have somewhere to go.
Xcel Energy is installing these systems at former coal plant sites — old fossil-fuel ground, now hosting rust-powered clean energy.
Bill Gates' Breakthrough Energy Ventures backed the deal with a $20 million grant.
Form Energy has also teamed up with GE Vernova, chasing a fresh wave of demand — powering the always-on grids that AI data centers now desperately need.
Total funding raised so far: nearly $800 million.
This isn't a lab experiment anymore.
It's a factory, a workforce, and a bet that the cheapest material on Earth might quietly solve one of clean energy's hardest problems.
That's all for now!
