6A Step Adjustable Current AC EV Charger for Weak Grids Temporary sockets, ageing residential circuits and shared building supplies cannot always carry a full 16A charging load. This unit starts at 6A and steps up through 8A, 10A, 13A and 16A, so the driver can dial the current down to match the actual capacity of the socket in use. Circuit breakers stay closed, plugs and wiring stay cool, and charging remains possible even in locations with very limited power supply capacity