The hydrogen pilot project H2CAST ETZEL has reached a pivotal moment with the successful injection of the first 90 tonnes of hydrogen into caverns at Etzel. STORAG ETZEL confirms that the existing caverns in the Etzel field are conducive for hydrogen storage and can be adapted swiftly for this purpose. The initiative, part of the 'H2CAST Etzel' project, focuses on the technical aspects of storing hydrogen in salt caverns. The injection process involves displacing brine with gaseous hydrogen delivered at 300 bar pressure. Despite initial challenges in hydrogen procurement, the project has managed to store several tonnes underground securely. Future plans include testing different processes for hydrogen purification and eventual connection to the H2 'core network' for supply via pipeline. The project has received authorization for hydrogen storage from the supervisory authority. The team is confident about overcoming upcoming challenges and emphasizes the advantage of their experienced personnel in managing the operation. With ongoing lorry deliveries until pipeline connection, the project envisions filling the caverns with around 200 lorry trailer loads of hydrogen. The successful conversion and storage mark a significant step forward in utilizing existing infrastructure for hydrogen purposes in the region.