Researchers at ETH Zurich have unveiled a pioneering pilot plant in Zurich aimed at addressing the challenges of hydrogen storage. The plant, located on the Hönggerberg campus, employs a unique process where hydrogen is reacted with iron oxide in three reactors. The resulting iron is then easily stored, offering a promising solution to the inefficiencies and high costs associated with current hydrogen storage systems. By using hot steam, the iron can be converted back into hydrogen and iron oxide, enabling the production of electricity or heat using gas turbines or fuel cells. This breakthrough technology opens up the possibility of producing hydrogen in summer with excess solar power and utilizing it for energy generation during winter, thereby helping to mitigate the winter electricity shortfall. The pilot plant in Zurich serves as a demonstration of the technical viability of this innovative storage approach, showcasing a positive step towards a more sustainable and efficient energy future.