Mixer feeder comprising a mobile chassis with which the mixer feeder can be displaced and a mixing tub which is placed on the chassis and in which different types of ingredient can be mixed, at least one mixing element arranged in the mixing tub for mixing ingredients fed to the mixing tub. The mixer feeder further comprises a driving unit for the at least one mixing element, comprising a drive shaft connectable to a power take-off of a tractor vehicle and at least one electric motor coupled to the common drive shaft, a converter for supplying power to the at least one electric motor, wherein the at least one electric motor is motor is provided with a continuous shaft with a shaft coupling at both outer ends of the continuous shaft. The electric motor can be supplied with power via a battery pack or via a mains power supply.
