Rising concern about climate change and keen awareness on effect of GHG emissions make it clear that energy transition towards low-carbon systems has to be the focus of future energy scenarios. Energy efficiency, electrification of consumptions, energy production from renewables and CCS represent the fundamental pillars of the radical transformation of energy sector. However, in order to deeply exploit variable renewable energy sources and to ensure their integration in the electric system, energy storage strategies have to be developed: hydrogen represents indeed one of the most promising solutions. Green hydrogen production allows to store large amount of renewable power surplus by means of an energy carrier that can be converted again into electricity or used in hard-to-abate sectors, namely those fields in which decarbonization is difficult to achieve.