In northern Germany, a massive battery storage facility made of 64 container-like units is helping stabilize the power grid by storing excess wind and solar energy and releasing it when needed.

Developed by Ecostor, the system can power 170,000 homes for two hours and is part of a growing network of similar projects nationwide. These storage units aim to lower energy prices by balancing supply and demand, though critics warn of potential overcapacity and reliance on battery suppliers in China.

Ecostor defends its use of Chinese-made batteries, citing strict regulations and the lack of European alternatives. Despite challenges, Germany's energy storage capacity is expected to increase fivefold within two years, marking a significant step in its energy transition.

This video summary was created with AI from the original DW script. A journalist edited it before publication.