Sma Solar Technology Ag

Carsten Ewig

Sven Bremicker

Henrik Wolf

Benedikt Kuenzel

Dietmar Meerwart

Sven Bremiker

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.

Inverter with at least two DC inputs, photovoltaic system comprising such an inverter and method for controlling an inverter

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.

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Kassel, Germany

Carsten Ewig