Electric power generating set

An electric power generating set, comprising a shell (2) that forms internally an accommodation compartment (3) for a motor (4) for delivering mechanical energy, and a current generator (5), which is coupled to the motor (4), capable of converting the mechanical energy delivered by the motor (4) into electric power, to be supplied to at least one respective user device. At least in one configuration for use, the motor (4) and the generator (5) rest on the shell (2) at a plurality of useful surfaces, which are inclined with respect to the resting surface of the shell (2) and rest detachably on respective surface regions that are shaped complementary and are associated rigidly with the shell (2) for the automatic centering and reference of the motor (4) and of the generator (5) with respect to the shell (2).