For the first time, an offshore wind turbine has successfully produced green hydrogen without a connection to the power grid. However, the H2Mare plant – a flagship project of the Federal Ministry of Education and Research – was initially only tested on land, using two electrolysers connected to a wind turbine. In the future, green hydrogen is to be produced more cheaply as the costs for connecting to the grid are eliminated and less energy is lost. The project sponsors Siemens Gamesa, RWE, the Fraunhofer Institute and Forschungszentrum Jülich announced this on Wednesday.