The invention relates to a method for operating a power converter (1), preferably a solar inverter, for feeding a load current (Iload) into a grid (3). The method includes the steps of determining the load current (Iload), monitoring an output voltage (Uout) of the power converter (1), and controlling the load current (Iload), to avoid that the output voltage (Uout) exceeds a voltage limit (Uout,lim), wherein the voltage limit (Uout,lim) is adjusted in dependency of the load current (Iload). Furthermore the invention relates to a corresponding power converter (1) for connecting to a grid (3), preferably it relates to a solar power converter. This power converter (1) includes a load current sensor (142), an output voltage sensor (143) and a load current controller (141).