For lead accumulators 6 to 24 V. With this accumulator separating filter 2 accumulators are charged separately at one source of charging current. For charging currents up to 10 A at maximum (with cooling 20 A). The charging current distributes in such a manner that an empty accumulator will be charged more than an accumulator that is almost charged. It is perfect for motor caravans if one accumulator operates the television, radio etc. and the second accumulator must remain charged in order to start the motor.