The invention relates to a device for transmitting electrical energy from an agricultural utility vehicle (10) to an attachment (26) which can be reversibly coupled to the utility vehicle (10). The device comprises at least one power electronics system (38, 74) which is arranged on the utility vehicle side, at least one electrical utility vehicle interface (36) and at least one electrical attachment interface (34). The power electronics system (38, 74) can be supplied with electrical energy which can be generated by a generator (16) of the utility vehicle (10). The power electronics system (38, 74) can be connected electrically to the generator (16) and to the utility vehicle interface (36). The attachment (26) has at least one attachment interface (34) and at least one electrical load (30, 102, 104). An agricultural working function can be carried out with the electrical load (30, 102, 104) of the attachment (26). At least one utility vehicle interface (36) can be coupled to at least one attachment interface (34), and in this way at least some of the electrical energy which is generated by the generator (16) of the utility vehicle (10) can be transmitted to the attachment (26) via the utility vehicle interface (36).