The disclosure relates to a method for controlling a flow of electrical power between an electrical energy source and at least two electric machines of a working vehicle. In one step, an electrical power which can be drawn from the energy source is determined. In a further step, at least two electrical powers which are required for the at least two electric machines are determined. In yet another step, the electrical power which can be drawn is distributed to the at least two electric machines in the ratio of the at least two required electrical powers, such a distribution being carried out if the sum of the at least two required electrical powers is greater than the electrical power which can be drawn. The disclosure also relates to a controller for carrying out the described method and to a working vehicle having such a controller.