Hydrogen energy can supply more flexibility and balancing to Smart Grid System (SGS),providing a back-up power particularly when fluctuating wind speed and solar radiation.SGS is allows the management of hydrogen energy integration,the energy demand and storage management optimization,real-time balance between electrical energy supply and demand load.Energy storage is essential to balance power supply and demand.In this study,we investigated challenges and barriers for hydrogen energy integration into SGS in terms of energy storage.