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The Green Blueprint

The Green Blueprint

Form Energy's manufacturing breakthrough

Jul 1, 2026 · 45m

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Lithium-ion batteries have revolutionized energy storage, but inexpensive, truly long-duration batteries may still have a significant role to play in backing renewables and decarbonizing the grid. Form Energy is tackling that challenge with a new class of iron-air batteries. By oxidizing and reducing iron — essentially rusting and unrusting the earth's most abundant metal — Form is creating low-cost, multi-day storage that competes directly with natural gas peaker plants. Mateo Jaramillo, CEO and co-founder of Form Energy, has spent over two decades in the battery industry, including building Tesla’s storage business. At Form, he’s leading the charge to bring these "E-peakers" to utilities…