METHOD AND A MASTER CONTROL UNIT FOR CONTROLLING AN ELECTRICAL SYSTEM OF AN ELECTRIC VEHICLE

A method for controlling an electrical system of an electric vehicle. The electrical system comprises a vehicle network and an external network having one or more external loads and connectable to an on-board network. The vehicle network comprises a converter unit adapted for connecting a traction voltage network and an on-board network having a battery unit and one or more internal loads and connected to the converter unit; and a switching unit adapted for controlling power output to the external network by connecting and disconnecting the on-board network and external network. The method comprises the steps of determining at least one current information of the electrical system and at least one safety current value; and controlling the switching unit to control the power output from the on-board network to the external network depending on the at least one current information and the at least one safety current value.