A battery charging system comprises a voltage bus; at least one charging circuit comprising: an input connected to the voltage bus; an output; and a converter connected between the input and the output and configured to provide DC power to the output; a plurality of charging ports, each charging port comprising: an input; and a pair of contacts configured to connect to battery terminals, the pair of contacts being connected to the input to enable a voltage received at the input to be applied across the pair of contacts; and a plurality of switches configured to connect and disconnect the output of the at least one charging circuit to the input of any one of the charging ports in the plurality of charging ports; and a control unit operably connected to the plurality of switches and configured to operate the plurality of switches.