A battery electric vehicle (BEV) uses energy stored in batteries charged with electricity from the grid. An electric vehicle using fuel cell technology (FCEV) is fuelled with hydrogen which is converted to electricity while the vehicle is being driven. The fuel cell electric trucks are electric, like battery electric trucks, with the difference that most of the energy in a FCEV is stored as hydrogen, with some support from batteries. Volvo Trucks is working with both technologies. While battery electric trucks can be purchased today, fuel cell electric trucks will be available for commercial use in the second half of this decade.