The Prototype Electrolysis Plant HyLIOS project is focused on developing and testing advanced electrolyzer technology for hydrogen production. Located in Europe, the project aims to demonstrate the commercial viability of large-scale hydrogen production through water electrolysis, using renewable energy sources. The plant will serve as a prototype to evaluate the performance, efficiency, and scalability of the technology, which is essential for the transition to a clean energy future. By splitting water into hydrogen and oxygen using electricity, the plant will produce green hydrogen, a key element in reducing carbon emissions and decarbonizing various industries, including transportation and manufacturing. The HyLIOS project aligns with global efforts to promote sustainable energy solutions and will contribute to the development of a hydrogen economy. It also represents a step forward in advancing electrolysis technologies, paving the way for future large-scale hydrogen production plants.