Google's massive Minnesota bet on battery innovation reshapes clean energy economics. The tech giant is building the world's largest battery storage system with Form Energy's iron-air technology, capable of delivering 100 hours of continuous power. This represents a watershed moment for long-duration energy storage, addressing the renewable sector's biggest challenge: reliability during extended cloudy periods and peak demand. Form's iron-air batteries cost roughly one-tenth of lithium-ion alternatives, making multiday storage economically viable for the first time. The 300-megawatt system, paired with 1.4 gigawatts of wind and 200 megawatts of solar, demonstrates that renewables can finally compete with fossil fuels and nuclear on reliability. Form Energy, preparing to go public next year, is scaling manufacturing in West Virginia.
