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.
Victron Argofet Isolator 200-3 Three batteries 200A ARG200301020R
|GTIN (Global Trade Item Number)
||65 x 120 x 200
|Net Weight (kg)
|Number Of Battery Outlets
|Maximum Charge Current
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.
The option of a 10-year limited warranty can only be applied during the actual purchase of the product.
The Argofet Isolator 200-3 (ARG200301020R) efficiently manages up to 200A between three batteries, providing reliable, safe power for multiple applications. Enjoy efficient charging, solid-state reliability, safety, and a compact design.