Power supply unit with two accumulators and two generators in a commercial vehicle

Power supply unit with two accumulators and two generators in a commercial vehicle with internal combustion engine, having a body circuit (Kr1) and a starter circuit (Kr2), with a circuit in the currents of the two generators, as needed, divided between the two circuits, characterized, that the vehicle body circuit (Kr1) and the starter motor circuit (Kr2) with a relay (K3) connected (K3 closed) or separable (K3 open), and that with another relay (K4) in the starter circuit (Kr2) is open relay (K3) and the relay is closed (K4) of the accumulator (14) of the starter motor circuit (Kr2) is preferred, and by the generator (13) in the starter circuit (kr2) rechargeable and opened relay (K4) is separable from the starter circuit (Kr2).