Serial hybrid with auxiliary generator management

The hybrid drive has an internal combustion engine (3) and the electric machine (1) which are connected together and/or separated from each other through a clutch (15). An output (14) over which incineration-motor energy and/or electrical power supplied to auxiliary unit (11) is provided between the clutch and internal combustion engine. The incineration-motor energy is supplied from the electrical energy storage unit (6) when the clutch is closed. An independent claim is included for method for operating hybrid drive.