Power circuit for supplying power for an electrically driven vehicle, the power circuit comprising: - an energy store connection which is provided for the purpose of connecting a vehicle-side energy store; - a DC voltage connection set up to connect external systems, in particular an external supply network; - at least one bidirectional DC/AC converter which has an AC voltage side and is part of a charging apparatus and is set up to generate an AC voltage conventional for supply networks, the AC voltage side being connected to an AC voltage connection of the power circuit, the AC side of the DC/AC converter being connected to an electrical machine of the power circuit or to a connection for the latter and forming an inverter for the electrical machine, or the power circuit having a selection circuit which selectably connects the AC voltage side to the electrical machine or the connection for the latter, to an internal AC voltage connection, to the AC voltage connection in the form of an external connection and/or to a coil for inductive energy transmission or a corresponding coil connection; and the power circuit also comprising at least one DC/DC converter having two converter sides (52, 54), the first converter side being connected to a DC voltage side of the DC/AC converter via a linking point and the DC voltage connection likewise being connected to this linking point, the second converter side of the DC/DC converter being connected to the energy store connection, and the DC/DC converter being set up to transmit energy in a bidirectional manner between the two converter sides (52, 54), as a result of which the DC voltage connection is set up to charge the vehicle-side energy store and to support an external supply network, energy being able to flow through the DC voltage connection in both directions. - an energy store connection which is provided for the purpose of connecting a vehicle-side energy store; - a DC voltage connection set up to connect external systems, in particular an external supply network; - at least one bidirectional DC/AC converter which has an AC voltage side and is part of a charging apparatus and is set up to generate an AC voltage conventional for supply networks, the AC voltage side being connected to an AC voltage connection of the power circuit, the AC side of the DC/AC converter being connected to an electrical machine of the power circuit or to a connection for the latter and forming an inverter for the electrical machine, or the power circuit having a selection circuit which selectably connects the AC voltage side to the electrical machine or the connection for the latter, to an internal AC voltage connection, to the AC voltage connection in the form of an external connection and/or to a coil for inductive energy transmission or a corresponding coil connection; and the power circuit also comprising at least one DC/DC converter having two converter sides (52, 54), the first converter side being connected to a DC voltage side of the DC/AC converter via a linking point and the DC voltage connection likewise being connected to this linking point, the second converter side of the DC/DC converter being connected to the energy store connection, and the DC/DC converter being set up to transmit energy in a bidirectional manner between the two converter sides (52, 54), as a result of which the DC voltage connection is set up to charge the vehicle-side energy store and to support an external supply network, energy being able to flow through the DC voltage connection in both directions.