Method and a device for feeding electrical power to an electrical energy supply network

The method involves connecting an electric power supply device with a power supply network (13) in the form of a direct voltage over an inverter (17). A maximum power point (MPP) tracker is provided for influencing the inverter to determine the intermediate circuit target voltage (udc). The controlling controller is adapted to change a given reactive power reference value to a reactive power value. The inverter is influenced by the intermediate circuit target voltage and the reactive power value. An independent claim is included for device for feeding electric power into an electrical power supply network.