I ran Tesla's energy storage division. Lithium-ion is great for 4 hours. The grid needs 100 hours. That gap is why Form Energy exists.
Bill Gates invested because he understands that the hardest problem in clean energy is multi-day storage. We solve it.
Our factory is in Weirton West Virginia. We are bringing clean energy manufacturing to a former steel town. The symbolism is intentional.
If this works it eliminates the last excuse for burning fossil fuels to keep the lights on during a cloudy windless week.
The battery is made of iron and air. The raw materials cost almost nothing. That is the whole point.
Reversible rusting. That is the entire technology. Iron rusts to discharge. You reverse the rust to charge. Nature has been doing this for billions of years.