STORAG ETZEL has made remarkable progress in the H2CAST Etzel project, which involves the conversion of salt caverns for hydrogen storage. The initiative successfully initiated the storage process by injecting the first tonnes of hydrogen into the caverns, with plans to ultimately store 90 tonnes. Carsten Reekers, the project manager, confirmed the readiness of the existing infrastructure through leakage tests. Despite initial challenges in hydrogen procurement, STORAG ETZEL has stored several tonnes of hydrogen and aims to escalate operations to complete cavern filling. The upcoming phase in 2025 will focus on building hydrogen purification plants to ensure stored hydrogen's quality. The company's use of caverns, previously utilized for natural gas and oil storage, showcases an adaptable infrastructure for the growing hydrogen market. Approval for connection to the H2 core network sets the stage for simplified supply and reduced reliance on truck deliveries. Monitoring by regulatory authorities ensures compliance with standards, leveraging STORAG ETZEL's expertise in underground storage for a successful project implementation.