Marine battery charger / splitter
BS1252 - BS1253 Vetus

BATTERY SPLITTER
FOR SIMULTANEOUS CHARGING OF 2 OR 3 BATTERY BANKS FROM ANY CHARGING SOURCE, WITH NEGLIGIBLE VOLTAGE DROP
A battery splitter may be considered as an automatic battery selector switch. It ensures automatic distribution of the charging current from the alternator and/or the battery charger, to all banks of batteries, whilst keeping them insulated as supply sources. This is possible by virtue of the fact that the semiconductors employed, allow current to flow from the charging source to each of the battery banks separately and not the other way around. In other words: it is not possible for one battery bank to discharge into another. The battery for domestic services may be (almost) exhausted but the starter battery will remain unaffected.
Once the engine has been started, the alternator will automatically recharge all banks of batteries. IN CONTRAST WITH MOST OTHER MAKES OF DIODE SPLITTER, THIS VETUS ALTERNATIVE HAS NEGLIGIBLE VOLTAGE DROP, DUE TO THE USE OF MOSFET TRANSISTORS INSTEAD OF DIODES (0.1 V AT 20 A, INSTEAD OF 0.7 V). Therefore, the actual charging voltage is almost identical to the voltage provided by the alternator, ensuring optimum battery charging. There is no need to compensate the output of the alternator, even if that is possible.