A circuit arrangement for generating an AC voltage (u AC), comprising: - at least one modular inverter, which is in the form of a cascade of multiple inverter units; - a control device for configuring the inverter units; and - a data transmission system for signal transmission between the control device and the inverter units, wherein each of the inverter units can be connected to a dedicated DC voltage source, has a control input (s IN) and a data output (s OUT) and is designed to take control signals from the control device that are received via the control input (s IN) as a basis for making the associated DC voltage source available on the output side for generating the AC voltage (u AC) or unavailable, wherein the data transmission system has a control line connected to the control device and at least one data line connected to the control device, wherein additionally the control line is connected to the control inputs (s IN) of the inverter units and the at least one data line is connected to the data outputs (s OUT) of the inverter units, wherein the inverter units are designed to use the at least one data line to transmit state information relating to the respective associated DC voltage source to the control device, and wherein the control device is designed to transmit the control signals to configure the inverter units on the basis of the received state information, characterized in that multiple instances of the inverter units are combined to form a common module group, wherein the circuit arrangement has multiple instances of said module groups, and wherein each of the module groups has a module control input (M IN) connected to all the control inputs (s IN) of the inverter devices in the module group and a module data output (M OUT) connected to all the data outputs (s OUT) of the inverter units in the module group, wherein the data transmission system has precisely one data line for each of the module groups, wherein the control device has a logic input gate, preferably an OR gate, the input side of which is connected to the data lines and the output side of which provides a single, combined data line for the further processing within the control device, and wherein each of the module groups has a logic output gate, preferably an OR gate, the input side of which is connected to the individual data outputs (s OUT) of the inverter units in the module group and the output side of which is connected to the module data output (M OUT) of the module group. - at least one modular inverter, which is in the form of a cascade of multiple inverter units; - a control device for configuring the inverter units; and - a data transmission system for signal transmission between the control device and the inverter units, wherein each of the inverter units can be connected to a dedicated DC voltage source, has a control input (s IN) and a data output (s OUT) and is designed to take control signals from the control device that are received via the control input (s IN) as a basis for making the associated DC voltage source available on the output side for generating the AC voltage (u AC) or unavailable, wherein the data transmission system has a control line connected to the control device and at least one data line connected to the control device, wherein additionally the control line is connected to the control inputs (s IN) of the inverter units and the at least one data line is connected to the data outputs (s OUT) of the inverter units, wherein the inverter units are designed to use the at least one data line to transmit state information relating to the respective associated DC voltage source to the control device, and wherein the control device is designed to transmit the control signals to configure the inverter units on the basis of the received state information, characterized in that multiple instances of the inverter units are combined to form a common module group, wherein the circuit arrangement has multiple instances of said module groups, and wherein each of the module groups has a module control input (M IN) connected to all the control inputs (s IN) of the inverter devices in the module group and a module data output (M OUT) connected to all the data outputs (s OUT) of the inverter units in the module group, wherein the data transmission system has precisely one data line for each of the module groups, wherein the control device has a logic input gate, preferably an OR gate, the input side of which is connected to the data lines and the output side of which provides a single, combined data line for the further processing within the control device, and wherein each of the module groups has a logic output gate, preferably an OR gate, the input side of which is connected to the individual data outputs (s OUT) of the inverter units in the module group and the output side of which is connected to the module data output (M OUT) of the module group.