Abstract: Method and high voltage platform for vehicular all-electric on-board charging and depleting of the battery system conducted safely that consists of a single, parallel, or multiple power generation set (Power Gen-Set) apparatuses where one or more of them is a converter of mechanical energy to ac or dc electricity as a primary power supply to the phase on-board charger integrated in the propulsion system. Power Gen-Sets with other electronic components create a powertrain platform that are power suppliers for replenishing dissipated power used for propulsion. The Power Gen-Sets are in communication via AI computing module and powered by a portable energy storage device that is arranged external of the vehicle that can be removed for replenishment and/or replacement.