Uniper, an energy company, is embarking on a pioneering project in Krummhörn, Germany, to store hydrogen in a former salt dome. The pilot cavern, with a volume of 3,000 m³, is being prepared for trial operation starting with a gas tightness test in September 2024. This innovative storage facility aims to hold almost 500,000 standard cubic meters of green hydrogen, distinguishing it as one of the first of its kind. Uniper plans to test equipment and materials for hydrogen compatibility, gain experience in hydrogen storage quality, and explore thermodynamics and rock mechanics. The company will also set up a hydrogen test facility to analyze gas quality under realistic scenarios and ensure customer satisfaction. With an investment expected in the low double-digit millions and support from the Lower Saxony Ministry, this project highlights a commitment to sustainable energy practices. Additionally, Uniper's broader goal of achieving complete CO₂-neutrality by 2040 aligns with the current shift towards environmentally friendly energy solutions. Despite previous challenges, including financial difficulties following the halt in Russian gas supplies, Uniper's focus on green hydrogen storage signifies a positive step towards innovation and environmental responsibility.