Abstract: A photovoltaic system includes a first and a second photovoltaic generator (9, 11) which delivers electric energy, an inverter (4) which can be coupled to the PV-generators (9, 11) for converting electric energy of the PV generators (9, 11) to output AC energy, and a switchable coupling arrangement (3) for coupling the PV generators (9, 11) to each other and to the inverter (4). The coupling arrangement (3) is arranged functionally between the PV generators (9, 11) and the inverter (4) and designed to connect the PV generators selectively either in a series circuit arrangement or a parallel circuit arrangement to the inverter (4). The PV system (1) can therefore expediently be operated with an intermediate circuit voltage which is higher than the maximum voltage of one PV generator for achieving improved efficiency whereas it can be switched to a lower intermediate circuit voltage when necessary, for example, in case of a ground connection fault, to maintain predetermined voltage limits.