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Victron Argofet 100-3 Three batteries 100A

Original price was: $195.00.Current price is: $177.27. (inc. GST)

The Victron Argofet 100-3 is a battery isolator that allows three batteries to be charged simultaneously from a single power source. It is designed to provide efficient and reliable charging for a range of applications, including marine, automotive, and off-grid power systems.

SKU: ARG100301020R Categories: ,

Victron argofet:

Similarly to diode battery isolators, FET isolators allow simultaneous charging of two or more batteries from one alternator (or a single output battery charger), without connecting the batteries together. Discharging the accessory battery for example will not result in also discharging the starter battery.


In contrast with diode battery isolators, FET isolators have virtually no voltage loss. Voltage drop is less than 0,02 Volt at low current and averages 0,1 Volt at higher currents.


When using ARGO FET Battery Isolators, there is no need to also increase the output voltage of the alternator. Care should taken however to keep cable lengths short and of sufficient cross section.



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 over the cable will be 0,26 Volt. 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 Volt!


Alternator energize input:

Some alternators need DC voltage on the B+ output to start charging. Obviously, DC will be present when the alternator is directly connected to a battery. Inserting a Diode or FET splitter will however prevent any return voltage/current from the batteries to the B+, and the alternator will not start. The new Argofet isolators have a special current limited energize input that will power the B+ when the engine run/stop switch is closed.


Additional information

Argo FET Battery Isolator

Argofet 100-3

Maximum charge current (A)


Maximum alternator current (A)


Number of batteries



M8 bolts

Weight kg (lbs)

1,4 (3.1)

Dimensions h x w x d in mm (h x w x d in inches)

65 x 120 x 200

(2.6 x 4.7 x 7.9)


Datasheet-Argo-Fet-Battery-Isolators-with-alternator-energize-input-ENVictron ARG100301020R spec Sheet

Manual-Argofet-EN-NL-FR-DE-IT-ES-SE-TRVictron ARG100301020R manual-