Enables two rechargeable batteries to be charged at the same time Can be used for the home garden or boats Can also be used for alternative energy sources Accumulators to be charged must be of the same voltage For lead accumulators rated 6 to 24V. With this accumulator separating filter 2 accumulators are charged separately at one source of charging current vehicle generators solar systems windmills chargers etc. For charging currents up to 10A total maximum current with cooling 20A. 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. & the second accumulator must remain charged in order to start the motor. Also ideal for holiday homes if one accumulator used for the alarm system must not be emptied.