Siemens Energy's Silyzer 300 is a large electrolyser for industrial use with an input power of 17.4 MW capable of producing more than 300 kg of green hydrogen per hour. It operates on the principle of PEM electrolysis and the resulting 15 m x 7.5 m facility can efficiently convert excess energy from renewable sources into hydrogen. Siemens Energy has been working on the development of the technology since 2011, and we are behind the optimization of the design of the packing plant. The know-how in the form of the key chemical electrolysis process is still held by Siemens Energy, which is currently building a gigafactory in Berlin for the mass production of the electrolyser cores. The production and assembly of the entire equipment around the Siemens Energy core should then take place at the Račice plant.