In late 2025, Germany solidified its role as a leader in sustainable energy storage by announcing the commercial deployment of a revolutionary "AirBattery" that utilizes underground salt caverns to store renewable energy at a massive scale. This technology, developed by Israeli firm Augwind Energy and set for commissioning between 2027 and 2028, merges the principles of pumped hydroelectric storage with compressed air to provide grid-scale capacity for weeks or even months at a time. The AirBatt