A self-contained, stand-alone power generator system comprising: an electric motor for applying torque to a shaft of a rotating mass, wherein the electric motor is powered by a dedicated power source; a battery for supplying additional power to the electric motor upon start up; at least one of a torque converter and a starter motor, for overcoming resting inertia of the rotating mass; a generator head coupled to the rotating mass, wherein the power generator is constructed such that when the generator head reaches operational speed, the generator head provides the additional power to the electric motor and recharges the battery.