The transportation sector is facing years of radical changes and technological evolution due to the increasing awareness of the regulatory bodies around the world towards the effects that this sector has on the environment. The main focus nowdays, is to reduce the emissions related to the human activities, of which the light and heavy duty vehicles represent a relevant percentage. For the light ones the hybridization and electrification paths seem to be already undertaken, but for the heavy duty ones there are some additional issues that prevent the manufacturers from going in the same way, mainly related to the range of the electric vehicles, that are currently strongly limited by the energy density of the battery packs.