For lead-acid batteries 6 to 24 V/DC. This battery switch allows two batteries to be charged separately from a charging source such as a car alternator, solar systems, wind turbines, or chargers. For charging currents up to a maximum of 10 A (20 A with cooling). The charging current is distributed in such a way that an empty battery is charged more strongly than a nearly full battery. Ideal for motorhomes, where one battery powers the TV, radio, etc., while the second battery must remain full for starting the engine. Also suitable for weekend homes, where a battery for the alarm system must not be discharged.