German offshore wind and hydrogen developers NorthH2, DOTI, and the Offshore-Windenergie Foundation have partnered to build an offshore electrolyzer demonstrator at the Alpha Ventus wind farm in the German North Sea. This project is a part of the NORTHSEA Hydrogen initiative and aims to showcase the efficiency of hydrogen production directly at sea. The 10 MW offshore electrolysis demonstrator will utilize power from Alpha Ventus to operate a proton exchange membrane electrolyzer, with plans to generate hydrogen and oxygen through electrolysis of seawater. The project also includes storage of hydrogen for reconversion during low-wind periods and potential utilization at sea once connected to the AquaDuctus pipeline. The partners anticipate important insights for future commercial offshore electrolyzer operations, along with opportunities to test and optimize systems under real conditions. Andreas Wellbrock highlighted the significance of this project in enhancing green hydrogen production efficiency and sustainability, while Karina Würtz emphasized the importance of testing technology components under North Sea conditions to overcome technical challenges in offshore hydrogen production.