Nowadays, because of the increase in energy consumption and global warming and due to the policy of the European commission, there is a necessity to go towards new and clean energy production technologies like renewable energy sources (RES). Although RES are crucial elements in order to arrive at electrification and decarbonisation of processes, they are intermittent sources that need large scale electrical energy storage. In this sense, a technology able to overcome these issues is Power-to-Gas (PtG), in which the produced electricity from RES can be stored in the form of Hydrogen. H2 is a clean fuel that has a fundamental role in solving the main problems connected to fossil fuels.