The role of environmental protection is also crucial in the automotive field and the hybridization of commercial vehicles is a current trend. The thesis is made in cooperation with AMET; its purpose is to investigate the various solutions and to define and control a model of a hybrid electric lightweight commercial vehicle. The state of the art of hybrid electric vehicles is studied, classifying them according to the hybridization factor and the powertrain structure. The potentialities of each configuration are collected, and the main pros e cons are deduced. Usually, these solutions lead to improvements in terms of fuel consumption and C02 emissions with respect to conventional vehicles, by ensuring the same performances.