and retrieved from the pv sub generator line 4 or into the pv main dc power line 4 u2032 likewise on inductively coupled paths in a corresponding manner the current measurement data i 1 u2032 in ig corresponding to the string currents i 1 in can be transmitted as data dat over the power line modem 8 to the central control unit 7 of the pv inverter 5 in a similar manner the input data ein u2032 corresponding to the input signals ein is able to be transmitted by the power line modem 8 to the central control unit 7 conversely the data dat able to be received or received from the central control unit 7 of the pv inverter 5 by the power line modem 8 can include control data ctr which corresponds to activation signals for activating a switching device 16 20 of the pv sub generator junction box 1 and or of actuators 25 for the pv modules 3 the control unit 10 can also have further digital and or analog outputs by which switching elements such as actuators not identified any further here can be activated fig6 is an illustration of an exemplary pv generator junction box 6 in accordance with the invention the pv generator junction box 6 in the example shown in fig6 has three sub generator line terminals 61 for connecting a pv sub generator line 4 of a pv sub generator junction box 1 in each case the pv generator junction box 6 further features a main dc power line terminal 62 for connecting a pv main dc power line 4 u2032 i e a remote central pv inverter 5 the pv generator junction.