Hydrogen will play an important role alongside electricity in the low-carbon economy mainly as a storage and transportation medium for renewable energy sources. Electricity is being decarbonized rapidly and has the ability to cross over into heat and transport. Hydrogen possesses this same versatility and enables routes to deeper decarbonisation through providing low carbon flexibility and storage. The numerous hydrogen production, distribution, and consumption pathways present complex trade-offs between cost, emissions, scalability, and requirements for purity and pressure. Fuel cells, as an efficient conversion technology, and hydrogen, as a clean energy carrier, have great potential to contribute to addressing the energy, environmental and economic challenges that are facing the world. Hydrogen fuel cells allow renewable energy technology to be applied to transport as well as facilitate distributed power generation while helping to cope with the variable power and intermittent nature of renewable energy sources. Fuel cell and hydrogen (FCH) technologies are most advanced in the propulsion of fuel cell electric vehicles (FCEVs), most notably passenger vehicles and buses. Significant progress has been made in recent years to address technical issues such as start-up, driving range and refueling times -reliability of 98% has been achieved.