A method for minimizing grid feedback of a PV park to an energy supply grid connected thereto at a point of common coupling, wherein the PV park comprises a plurality of inverters divided into groups (12, 13), said method comprising: - for at least a first inverter (2, 3, 7) of each group (12, 13), determining a first parameter representative of a first coupling impedance (Z T 2, Z T 3, Z T 7) between the first inverter (2, 3, 7) and the point of common coupling and determining a second parameter representative of a second coupling impedance (Z N 2, Z N 3, Z N 7) between the group (12, 13) containing the first inverter (2, 3, 7) and the point of common coupling, - storing the first and the second parameter in an operating control unit of the first inverter (2, 3, 7), - in a daytime operation of the PV park, feeding in of reactive power by the first inverter (2, 3, 7) depending on the first parameter, said reactive power corresponding to the magnitude of a reactive power absorbed by the respective underlying first coupling impedance (Z T 2, Z T 3, Z T 7), and - in a nighttime operation, deactivating all the inverters of a group (12, 13) with the exception of the first inverter (2, 3, 7), wherein the deactivated inverters remain connected to the energy supply grid, and feeding in of reactive power by the first inverter (2, 3, 7) depending on the second parameter, wherein the reactive power fed in corresponds to a magnitude of a reactive power absorbed by the respective underlying second coupling impedance (Z N 2, Z N 3, Z N 7), such that the exchange of reactive power with the energy supply grid via the point of common coupling caused by the inverter group (12, 13) is minimized or fully avoided. - for at least a first inverter (2, 3, 7) of each group (12, 13), determining a first parameter representative of a first coupling impedance (Z T 2, Z T 3, Z T 7) between the first inverter (2, 3, 7) and the point of common coupling and determining a second parameter representative of a second coupling impedance (Z N 2, Z N 3, Z N 7) between the group (12, 13) containing the first inverter (2, 3, 7) and the point of common coupling, - storing the first and the second parameter in an operating control unit of the first inverter (2, 3, 7), - in a daytime operation of the PV park, feeding in of reactive power by the first inverter (2, 3, 7) depending on the first parameter, said reactive power corresponding to the magnitude of a reactive power absorbed by the respective underlying first coupling impedance (Z T 2, Z T 3, Z T 7), and - in a nighttime operation, deactivating all the inverters of a group (12, 13) with the exception of the first inverter (2, 3, 7), wherein the deactivated inverters remain connected to the energy supply grid, and feeding in of reactive power by the first inverter (2, 3, 7) depending on the second parameter, wherein the reactive power fed in corresponds to a magnitude of a reactive power absorbed by the respective underlying second coupling impedance (Z N 2, Z N 3, Z N 7), such that the exchange of reactive power with the energy supply grid via the point of common coupling caused by the inverter group (12, 13) is minimized or fully avoided.