To meet the sustainability goals set by the European parliament by 2050 and attain the so-called "net-zero" emissions standard, the automotive industry will need to walk away from traditionally combustion-powered vehicles and develop alternative hybrid powertrains to propel private and commercial vehicles alike. In particular, hydrogen-powered vehicles have a lot of potential, in particular if combined to a battery to palliate the slow dynamics of a fuel cell. However, the production of batteries is resource-intensive and their life cycle can be significantly shortened depending on the use case. In this thesis, a model of a fuel cell electric hybrid light-duty vehicle has been proposed, with the fuel cell paired in series with a downsized battery with respect to the battery-only version.