Abstract: The disclosure relates to an inverter with at least two DC inputs, which are coupled to a common DC link, which is connected to an inverter bridge. At least one of the DC inputs is coupled to an additional DC link. The disclosure also relates to a PV system comprising such an inverter and to a method for controlling such an inverter of a PV system, wherein a power flow from at least one of the DC inputs is directed into the common DC link and/or into the additional DC link on the basis of suitably coordinated control of the DC-DC converter and of an additional DC-DC converter allocated to the additional DC link.

Abstract: The disclosure relates to an inverter with at least two DC inputs, which are coupled to a common DC link, which is connected to an inverter bridge. At least one of the DC inputs is coupled to an additional DC link. The disclosure also relates to a PV system comprising such an inverter and to a method for controlling such an inverter of a PV system, wherein a power flow from at least one of the DC inputs is directed into the common DC link and/or into the additional DC link on the basis of suitably coordinated control of the DC-DC converter and of an additional DC-DC converter allocated to the additional DC link.

Abstract: A method and device to discharge a filter capacitance at the output of an inverter for feeding electrical power from a generation unit into a grid via a grid connect switch is disclosed. The grid connect switch has a generation unit side and a grid side, and via AC grid terminals on the grid side of the grid connect switch, the filter capacitance is connected to at least one of the AC grid terminals. A voltage applied across the filter capacitance is rectified independent of a polarity thereof, and a rectified voltage of a fixed polarity is provided, and a DC voltage link of a power supply unit for supplying power to circuitry of the inverter is charged with this rectified voltage.

Abstract: A method and device to discharge a filter capacitance at the output of an inverter for feeding electrical power from a generation unit into a grid via a grid connect switch is disclosed. The grid connect switch has a generation unit side and a grid side, and via AC grid terminals on the grid side of the grid connect switch, the filter capacitance is connected to at least one of the AC grid terminals. A voltage applied across the filter capacitance is rectified independent of a polarity thereof, and a rectified voltage of a fixed polarity is provided, and a DC voltage link of a power supply unit for supplying power to circuitry of the inverter is charged with this rectified voltage.