Uniper has inaugurated a pilot underground hydrogen storage cavern project in Krummhörn, Germany, with the objective of filling it with gas in September. The Hydrogen Pilot Cavern (HPC) aims to trial the storage of hydrogen and natural gas blends at an existing borehole, with an initial capacity for nearly 500,000Nm3 of hydrogen. This initiative is part of Uniper's strategy to explore commercial hydrogen storage projects, with plans to expand the site's capacity in the future. The pilot cavern will serve as a real-world testing ground for equipment and materials, offering insights into hydrogen gas behavior during storage. The Krummhörn facility, supported by Lower Saxony's government, paves the way for potentially storing up to 250GWh of hydrogen, and could be linked to Germany's proposed hydrogen core network. To ensure the project's progression beyond the pilot stage, Uniper emphasizes the necessity of a reliable long-term regulatory framework and investment incentives. In the broader context of energy storage solutions, salt caverns like the one in Krummhörn are highlighted as crucial for meeting future grid demands. These caverns enable the storage of large quantities of clean energy in a cost-effective manner, serving as a key component in balancing supply and demand in the energy system. The article underscores the importance of different storage methods for hydrogen, emphasizing the significance of high-capacity energy storage solutions to facilitate the integration of hydrogen into the energy system.