Victron Argofet 200-2 battery separator - ARG200201020

As with Argodiode jumpers, Argofet jumpers such as the Victron Argofet 200-2 Battery Separator allow two or more batteries to be charged simultaneously from a single alternator (or from a single charger) without connecting the batteries together; for example, discharging the service battery does not discharge the starter battery, and vice versa.

Compared to diode bridges, FET bridges have the advantage of virtually zero voltage loss: The voltage drop is less than 0.02 V at low currents and averages 0.1 V at higher currents.

When using Argofet diode bridges, it is not necessary to also increase the alternator output voltage. However, it is highly recommended that the cables be short and of a suitable cross-section.

Example:
When a current of 100 A flows through a cable of 50 mm2 cross section (AWG 0) and 10 m length (30 ft), the voltage drop in the cable will be 0.26 volts. Similarly, a current of 50 A through a cable of 10 mm2 cross section (AWG 7) and 5 m length (15 ft) will result in a voltage drop of 0.35 volts.

Alternator power supply input

Some alternators require a DC voltage on the B+ output to start charging. Obviously, DC will be present when the alternator is connected directly to the battery. However, if a diode bridge or FET separator is inserted, any voltage/current return from the batteries to the B+ output will be prevented, and the alternator will not be activated.
The new Argofet diode bridges have a special current-limiting energized input that will feed the B+ output when the motor start/stop switch is closed.

Datasheet Victron Battery Separator Argofet 200-2 - ARG200201020

See Victron Battery Separator Argofet 200-2 datasheet - ARG200201020