H2Giga is one of the three hydrogen lead projects of the Federal Ministry of Education and Research (BMBF). The aim is to support the series production of electrolysers for worldwide use. Until now, this technology has largely been produced by hand. H2Giga has now officially started. Leading manufacturers of electrolysers are involved in the project, including Siemens Energy, Linde, MAN Energy Solutions, Thyssenkrupp and Sunfire. On the science side, RWTH Aachen University, several Fraunhofer institutes as well as institutes of the Helmholtz Association and the Max Planck Society, for example, are also involved. Within the framework of the National Hydrogen Strategy, the construction of 5 gigawatts of electrolysis capacity is planned in Germany by 2030. It is foreseeable that the demand in Germany, but also worldwide, will be considerably higher.