Victron Argofet 200-2 200A FET Battery Isolator for 2 Batteries

Victron Argofet 200-2 Two batteries 200A

Similar to battery isolators, FET isolators allow simultaneous charging of two or more batteries by an alternator or a charger connection without connecting the batteries to each other. Discharging the service battery does not lead to a simultaneous discharge of the starter battery.

In contrast to battery isolators, there is practically no voltage loss with FET isolators. The voltage drop is less than 0.02 volts at low currents and only 0.1 volts at higher currents.

With ARGO FET battery isolation, no voltage increase is required. However, attention should be paid to short cable lengths and sufficient cross-sections.

An example:
A 100 A current has a voltage loss of 0.26 volts with a cable length of 10 m and a 50 mm2 cable cross-section. With 5 m of cable with 10 mm2, a 50 A current causes a voltage loss of 0.35 volts!

Alternator start-up excitation
Some alternator types require a DC voltage at the B+ terminal for start-up excitation. On the one hand, there is a direct cable connection between the battery and the alternator. On the other hand, however, the isolating diode prevents current feedback, so that the alternator does not start. The new Argofet battery isolation has a special current-limited connection for start-up excitation when the alternator is started.

Documents & Downloads

• Datasheet Victron Argofet