NOVELTY - The apparatus has an energy storage device (12) that outputs direct current (DC) voltage. A DC bus (14) is coupled to energy storage device and high-impedance voltage source (84). A controller (78) is configured to control a control circuit (34) to cause energy on DC bus to be dissipated through braking resistor during regenerative braking event. The energy storage device is caused to receive charging energy from high-impedance voltage source bypassing braking resistor during charging event, after threshold value is crossed.    USE - Apparatus for transferring energy between energy storage device such as battery, flywheel system, fuel cell and ultracapacitor, and external source of hybrid electric vehicles such as golf cars, on-road and off-road vehicles, neighborhood electric vehicles, forklifts and utility trucks.    ADVANTAGE - The transfer of electrical energy from external source to on-board electrical storage device of plug-in vehicle can be facilitated and the number of components dedicated only to transferring energy can be reduced. The external source components can be used for the dual purposes of motoring and recharging the energy storage devices. Thus the design of the off-board charging stations can be simplified and the cost can be reduced. The high current charging can be obtained in a cost effective manner. The rapid charging of the on-board energy storage devices can be accomplished such that a large current flows into the energy storage devices during recharging that is mainly limited by impedance of a voltage transformer without initial current control by electronic switching elements having higher current limiting properties.    DETAILED DESCRIPTION - INDEPENDENT CLAIMS are included for the following:    (1) a method of fabricating energy transfer system; and    (2) a system for transferring energy between energy storage device and external source of vehicle.    DESCRIPTION OF DRAWING(S) - The drawing shows a circuit diagram of the traction system.    Energy storage device (12)    DC bus (14)    Control circuit (34)    Controller (78)    High-impedance voltage source (84)