A method for transferring electric power to an electrical load, comprising steps of: converting an direct electric tension into an electric tension wave, applying the electric tension wave at the inlet to at least a couple of electrical galvanic isolation capacitors (125, 130) including a first capacitor and a second capacitor, supplying the electrical load connected in series between said galvanic isolation capacitors (125, 130) with the electric tension at the outlet from the said galvanic isolation capacitors (125, 130), wherein the conversion step comprises: alternatingly switching a first active switch, preferably a single active switch, on and off, and lowering the electrical power dissipated by the first active switch to a substantially nil value during each transition step of the first active switch by means of a reactive circuit; the method further comprises the step of temporarily deviating the electric tension wave at the outlet onto an electrical line set in parallel to the electrical load, wherein the electric line comprises a second active switch and characterized by the electric line further comprising a third capacitor connected in series with the second active switch and having a capacitor value that is sufficiently high to be considered a short-circuit with respect to the electric load, e.g. a charging device, when the second active switch is switched on and generating an electric pilot signal for switching on and off the second active switch alternatingly. converting an direct electric tension into an electric tension wave, applying the electric tension wave at the inlet to at least a couple of electrical galvanic isolation capacitors (125, 130) including a first capacitor and a second capacitor, supplying the electrical load connected in series between said galvanic isolation capacitors (125, 130) with the electric tension at the outlet from the said galvanic isolation capacitors (125, 130), wherein the conversion step comprises: alternatingly switching a first active switch, preferably a single active switch, on and off, and lowering the electrical power dissipated by the first active switch to a substantially nil value during each transition step of the first active switch by means of a reactive circuit; the method further comprises the step of temporarily deviating the electric tension wave at the outlet onto an electrical line set in parallel to the electrical load, wherein the electric line comprises a second active switch and characterized by the electric line further comprising a third capacitor connected in series with the second active switch and having a capacitor value that is sufficiently high to be considered a short-circuit with respect to the electric load, e.g. a charging device, when the second active switch is switched on and generating an electric pilot signal for switching on and off the second active switch alternatingly. alternatingly switching a first active switch, preferably a single active switch, on and off, and lowering the electrical power dissipated by the first active switch to a substantially nil value during each transition step of the first active switch by means of a reactive circuit; the method further comprises the step of temporarily deviating the electric tension wave at the outlet onto an electrical line set in parallel to the electrical load, wherein the electric line comprises a second active switch and characterized by the electric line further comprising a third capacitor connected in series with the second active switch and having a capacitor value that is sufficiently high to be considered a short-circuit with respect to the electric load, e.g. a charging device, when the second active switch is switched on and generating an electric pilot signal for switching on and off the second active switch alternatingly.