The invention relates to an inverter system (1) with several inverters (2), each of which having at least one control unit (6), with at least one line (7) each being provided between the inverters (2) for data exchange, as well as to an inverter (2), and to a method of operating several inverters (2) in such an inverter system (1). To achieve a high transmission safety, and a high data-transmission rate, it is provided that each inverter (2) has a communication device (8) which is connected to a control unit (6) of the inverter (2) and to the data lines (7) of two neighboring inverters (2), and which has a switching device (13), the switching device (13) being configured to switch the data lines (7) between a ring system and between a bus system logically based on this ring system.