Electric power Input: The energy required to travel the electrolysis method is placed on the electrolyzer’s electrodes. This latest facilitates the chemical reaction that splits the h2o molecules. Hydrogen then passes in the membrane and ejects on the cathode facet. PEM electrolyzers operate at great temperatures of 60oC to 80oC. https://pemelectrolysis81096.nizarblog.com/37212056/everything-about-hydrogen-electrolyzer