3 Battery Distributor 100A Argo Fet 100-3 - Victron Energy
Description
Similar to classic diode splitters, FET splitters allow multiple batteries to be charged from a single alternator (or a single-output battery charger), without the need to connect the batteries together. Discharging the auxiliary battery, for example, will not cause the starting battery to discharge.
Unlike diode splitters, FET splitters have virtually no voltage loss. Voltage drops are less than 0.02 Volts at low currents, and on average 0.1 Volt at higher currents.
By using ARGO FET splitters, it is not necessary to also raise the alternator's output voltage. However, it is still advisable to use short cables with sufficient cross-sectional area.
Example:
If a current of 100 A flows through a 50 mm² cross-sectional cable (AWG 0) that is 10 m long (30 ft), the voltage drop across the cable will be 0.26 Volt. Similarly, for a 50 A current flowing through a 10 mm² cross-sectional cable (AWG 7) that is 5 m (15 ft) long, the voltage drop will be 0.35 Volt!
**Alternator Power Input**
Some alternators require a DC voltage on the B+ terminal output to start charging. Of course, there will be DC when the alternator is directly connected to the battery. However, inserting a FET or diode splitter will prevent any voltage/current backflow from the batteries to the B+ terminal, and the alternator will not start.
The new Argofet splitters have a special limited-current power input that supplies the B+ terminal when the engine's Start/Stop switch is closed.