A system for feeding direct current into an alternating current network includes a plurality of active inverters with each of the active inverters having an optimum input power and being connected at a respective input side to at least one direct current generator of fluctuating output power. A switching device is included for the one or more direct current generators from a first active inverter to a second active inverter, or vice-versa, for effecting a switchover operation, with a control device initiating the switchover operation upon fulfillment of a condition; the control device including a device for determining when the condictionis fulfilled.