BI Battery Isolators
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- - + - Version no. 230609EN Article no. 500004204 BATTERY ISOLATORS BI & BATTERY MATE Solid state and electronic battery isolators Multiple battery charging To prevent the starter battery and the batteries supplying the lighting and bowthruster from draining each other they should be kept separate. As a consequence the charge system is more complicated than in installations with only one battery: the alternator on the propulsion engine has to recharge all the battery sets individually and the same applies to the battery charger. Although it is possible to select the battery source manually, using a battery switch, much better results can be achieved by placing a battery isolator in the positive cable connection from the alternator and/or battery charger to the various batteries. Almost all Mastervolt battery chargers come standard with two or three outputs. Only when two or more banks have to be charged with high current, a battery isolator has to be fitted (75 A + 100 A optional). Manual switch versus battery isolator The advantage of a manual switch is that, if needed, the battery supplying the system can be parallel connected to the starter battery. Before doing so, however, ensure the switch is fitted with a ‘dual’ mode. A downside to this method is that both batteries can become discharged at the same time. A more reliable option is to use a battery isolator. This aluminium profile has three or more diodes mounted inside it that isolate the charge current and prevent it recirculating. The battery isolator is ‘solid state’ and will therefore not wear. The Mastervolt battery chargers and alternator regulators are prepared to operate with traditional battery isolators, as this equipment offers easy accessible voltage adjustment to compensate the voltage drop. Solid state - maintenance free Charging is done fully automatically once you have fitted the BI battery isolator. As there are no moveable parts there is no wear. The (average) voltage drop for 0.7 V can be compensated for in different ways: 1. In Mastervolt appliances with sense wires (pos. and neg.), the voltage drop is automatically compensated for. 2. If the charger is not fitted with the sense wires, a jumper or dip switch setting will have to be made to increase the voltage. 3. Mastervolt alternators equipped with the Alpha Pro charge regulator can be adjusted to the correct charge voltage so that the voltage drop is compensated for. Mastervolt offers the Battery Mate series for use in installations where charge equipment cannot be adjusted. • HEAVY DUTY USE • EASY TO INSTALL • CAN OPERATE IN ANY ENVIRONMENT • FOR AUTOMOTIVE AND MARINE USE • BATTERY MATE VERSION A battery isolator as part of a charging system. VOLTAGE DROP FREE battery charger battery set 1 battery isolator battery set 2 + +

TECHNICAL SPECIFICATIONS max. output max. output dimensions no. of article no. model charger alternator lxwxh in mm weight batteries 83007021 BI 702-S + compensation diode 25/50 A 70 A 157x140x80 580 g 2 83007030 BI 703 25/50 A 70 A 207x140x80 1100 g 3 83012021 BI 1202-S + compensation diode 80 A 120 A 207x140x80 1200 g 2 83012031 BI 1203-S + compensation diode 80 A 120 A 207x140x80 1300 g 3 83116025 Battery Mate 1602 120 A 160 A 207x140x80 1000 g 2 83116035 Battery Mate 1603 120 A 160 A 207x140x80 1000 g 3 83125035 Battery Mate 2503 200 A 250 A 207x140x80 1100 g 3 83200150 Battery Watch...