The present invention relates to a smart energy management system for vehicles that are totally electric (1) or electro-hybrid (2), that prioritizes the regeneration of kinetic energy into electric energy, comprised by a main energy control unit (3) with adaptive control to improve the efficiency with subsequent travel on a specific route, embedded energy storage system (4), two-way charger for normal or occasional recharging of the vehicle (5), or for supplying electric energy to an external consumer, with converters for the auxiliary system (6), and remote operation control and servicing capability, use of a device with touch-sensitive screen (57) and with availability of on-board power sockets for recharging personal devices. The present invention also relates to a smart energy management system for energy generator (22, 23, 24, 25, 69, 84) for the distributed generation of electric energy in a non-embedded mode, as well as a method used to manage energy in these systems and a method for controlling the operation of an energy generator (22, 23, 24, 25 25, 69, 84).