This product is efficient for simultaneously charging several batteries. And is compatible with any type of dynamo in new systems. Note that the voltage drop between the alternator and the battery is so small that the dead battery performs far better than conventional battery separators. This ensures fast and complete charging of your batteries without the need for additional settings in the alternator. While battery separators are ordinary diodes, Battery Mates technology is electronic and includes MOSFETs (transistors). Its components compensate for voltage changes and ensure that charging continues at the proper voltage level, even with multiple battery banks. The input side of the Battery Mate is connected to the alternator and / or battery charger, while the two batteries are connected to the output side. Battery Mate is easily installed on DIN rails (industry standard). The Mastervolt battery can be used in any application, even if the standard alternator requires external stimulation or voltage measurement.