Inverter having a bistable switching unit

A method for supplying electrical energy to at least one consumer connected to a load terminal of an inverter that comprises:

• a battery terminal configured to connect to an electrical storage unit,
• the load terminal configured to connect to at least one electrical-energy consumer,
• a grid terminal configured to connect to a superordinate distribution grid,
• a bidirectional inverter bridge connected to the battery terminal,
• a first switching circuit, and
• a second switching circuit,
• the first switching circuit being arranged between the bidirectional inverter bridge and the second switching circuit, and the second switching circuit being arranged between the first switching circuit and the grid terminal,
• wherein the first switching circuit is configured to enter a first state without a holding current and to switch into a second state with a holding current, and
• wherein the second switching circuit is configured to be switched over by a signal, the method comprising:
• detecting a state of the superordinate distribution grid connected to the grid terminal using a grid monitoring circuit and reporting a failure to a controller of the inverter, and
• when the superordinate distribution grid fails:
• generating via the controller a signal to switch over the second switching circuit into the open state, and
• opening the second switching circuit.