The invention concerns a 3-phase charging assembly, and a method for providing such assembly, for optimal use of available electrical power when charging electrical vehicles, EV's. The charging assembly comprises a distribution cable supplying power by means of subsidiary isolated conductors for each phase (L1 in, L2 in, L3 in) and a neutral conductor (N in), at least one electric vehicle supply equipment, EVSE, each comprising internal circuitry with an input electrically connected to one or more of the subsidiary isolated conductors (L1 in, L2 in, L3 in) of said distribution cable, and an output (L1 out, L2 out, L3 out) electrically connectible to at least one EV for providing power for charging. Each EVSE comprises a plurality of primary relays (R5, R7, R9) configured to connect or disconnect electrical power provided by the conductors for each phase (L1in, L2 in, L3 in) at the input; a plurality of secondary relays (R6, R8, R10, ..., R16) configured in a relay matrix for enabling re-routing of each of the output conductors (L1 out, L2 out, L3 out) to any phase (L1in, L2 in, L3 in) at the input, and a control system comprising communication means, wherein the control system is configured to connect or disconnect each of said primary and secondary relays (R5...R16) and to transmit and receive relay status information to and from the EVSE.