Germany’s underwater energy vaults could be the world’s next power storage giant

Researchers at Germany's Fraunhofer Institute are developing a revolutionary energy storage system using massive underwater concrete spheres. The StEnSea project aims to harness deep-sea pressure to store renewable energy, with plans to deploy a full-scale prototype off California by 2026. This technology could potentially offer global storage capacity of 817,000 gigawatt-hours, enough to power millions of homes annually, while avoiding land use issues associated with traditional storage methods.