Google has partnered with Xcel Energy to implement a 300 MW/30 GWh iron-air battery system in Minnesota, alongside 1.6 GW of new wind and solar energy. Developed by Form Energy, this project aims to offer long-duration energy storage to stabilize intermittent renewables. The iron-air batteries have the capability to store renewables-generated electricity for up to 100 hours, making them a viable alternative to traditional power plants. This initiative is a key component of Google's commitment to decarbonization and meeting the energy needs of the AI era.