Abstract: The present invention generally relates to a self-charging system for electric vehicles comprises at least one gearbox comprises an input end and an output end mechanically coupled to one of the wheels of a vehicle to the input end to generate a rotational energy with an increased output of one of the torque or speed (RPM) to the output end; an auxiliary generator connected to the output end of the at least one gearbox to convert the rotational energy into electrical energy; a controller equipped with a maximum power point tracker to produce maximum power output; and a charger controller coupled to the maximum power point tracker to charge a batter of the vehicle upon limiting electric current rate of the power output to protect against electrical overload, overcharging, and overvoltage.