Victron Argo FET Battery Isolator 200-3 3 Batteries - 200AMP

The Victron Argo FET Battery Isolator 200-3 3 Batteries - 200AMP is a professional-grade power distribution system designed for vehicles with multiple battery banks, dual alternators, or auxiliary power requirements. Whether you're building a overland rig, powering auxiliary winches and lighting, or managing separate starter and auxiliary battery circuits, this FET isolator solves the core challenge: charging multiple batteries from a single alternator without directly connecting them together. Built by Victron Energy—a trusted name in marine and automotive electrical systems—this 200-amp unit is engineered for reliability in demanding off-road, commercial, and performance applications.

Unlike traditional diode battery isolators, the Argo FET isolator uses Field Effect Transistor (FET) switching technology to eliminate the voltage drop that diodes create—meaning your auxiliary batteries charge faster and more completely. The unit features a 200-amp continuous current capacity, allowing simultaneous charging of up to three independent battery banks from one alternator output. FET technology is far more efficient than diode systems, generating minimal heat and drawing virtually no parasitic current when isolating batteries. The compact form factor (6 x 3 x 10 inches) and modest 3.5-pound weight make integration into engine bay layouts straightforward, while the integrated logic automatically monitors and switches the isolator based on alternator output voltage—no manual relay control required.

Mechanics and fabricators routinely specify the Victron Argo FET for luxury trucks with factory auxiliary power systems, expedition vehicles, emergency service rigs, and performance builds requiring isolated auxiliary circuits. The 200-amp rating handles both high-demand charging scenarios and continuous parasitic loads without failure. Installation requires proper battery-to-isolator wiring using appropriately sized marine-grade cable; consult your vehicle's electrical diagram and Victron's wiring guide for three-battery configurations to ensure each bank is independently protected with fused circuits. This isolator is compatible with any alternator system and works seamlessly with lead-acid, lithium, or AGM battery chemistry.