Victron Argo FET Battery Isolator 3 batteries 100A w/ Alternator Energize Input (ARG100301020R)

Warranty Option: Standard 5 Years Warranty
Sale price$215.00



Victron Argofet 100-3 100A Three Batteries Isolator with Alternator Energize Input, 5 Year Warranty. 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.


Product Name Victron Argofet 100-3 100A Three Batteries Isolator with Alternator Energize Input, 5 Year Warranty
SKU ARG100301020R
GTIN (Global Trade Item Number) 8719076019060
Brands Victron
Product Category Batteries Other
Dimensions 65 x 120 x 200
Net Weight (kg) 1.4 Kg
Number Of Battery Outlets 3 Batteries
Maximum Charge Current 100A



Victron Energy warrants its products to be free from defects in workmanship and materials for a period of: Batteries: 2 year limited warranty Li-ion batteries: 3 year limited warranty All other products: 5 -year limited warranty.

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