Victron Argofet 100-2 battery separator - ARG100201020

As with Argodiode jumpers, Argofet jumpers, such as the Victron Argofet 100-2 Battery Separator - ARG100201020, allow two or more batteries to be charged simultaneously from a single alternator (or from a single charger) without connecting the batteries together. Therefore, discharging the auxiliary battery will not cause the starting battery to be discharged as well.

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 with a cross section of 50 mm² (AWG 0) and a length of 10 m, the voltage drop in the cable is 0.26 volts. Similarly, a current of 50 A through a cable with a cross section of 10 mm² (AWG 7) and 5 m. long will suffer 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 Argofet 100-2 battery separator - ARG100201020

See Victron Battery Separator Argofet 100-2 datasheet - ARG100201020