The invention relates to a generator unit (1; 31) for an agricultural or communal commercial vehicle, in particular a tractor, comprising a generator housing (2; 35) and at least one shaft (3) which is guided through the generator housing (2; 35) in a rotatably mounted manner. The shaft forms a coupling (4) for a power take-off shaft (23) of the commercial vehicle on a first end, while a connection (5) for an input shaft of an attachment is defined by the at least one shaft (3) on a second end. At least one electric generator (6; 32) is received in the generator housing (2; 35), said generator being drivable by the at least one shaft (3). The aim of the invention is to be able to provide a high-power generator and simultaneously still allow the use of a power lift (19) of the commercial vehicle. This is achieved in that a receiving device is additionally provided, said device being connected to the generator housing and forming receiving points (25, 26, 27) on the side of the first end of the at least one shaft (3) for connecting to suspension devices of the power lift (19) of the commercial vehicle, whereas the receiving device has connecting points (28, 29, 30) on the side of the second end of the at least one shaft (3) for receiving the attachment. The connecting points (28, 29, 30) of the receiving device match each of the suspension devices of the power lift (19) in shape and alignment.