Victron Argo Diode Battery Isolator - 160AMP - 2 Batteries

The Victron Argo Diode Battery Isolator - 160AMP - 2 Batteries is an essential component for dual-battery systems found in modern trucks, SUVs, RVs, and auxiliary power setups. This device enables simultaneous charging of two independent battery banks from a single alternator without physically connecting them together, preventing discharge of your primary starting battery when accessory loads drain a secondary battery. Whether you're building a dedicated winch power system, upgrading an RV electrical architecture, or installing auxiliary equipment on a work vehicle, the Argo isolator solves the real-world problem of battery depletion that occurs when multiple loads compete for charge.

The Victron Argo uses a diode-based isolation circuit rated for 160 amps of continuous charging current, allowing both batteries to accept charge simultaneously without the voltage drop or heat generation associated with solenoid isolators. The diode configuration ensures that once the engine stops and alternator output drops, the isolated battery cannot backfeed into the main starting battery, protecting engine start reliability in critical situations. Manufactured by Victron Energy—a trusted European name in marine and mobile power management—this compact unit measures 6 x 3 x 8 inches and weighs only 2.55 pounds, making it ideal for tight engine bay or battery box installations. The solid-state design requires no moving parts and produces no coil chatter, resulting in silent operation and superior reliability over the lifespan of your vehicle.

Mechanics and off-road enthusiasts commonly install the Argo isolator when adding high-draw accessories such as winches, auxiliary lighting systems, air compressors, or refrigerators to vehicles that rely on a single charging source. The 160-amp capacity handles most alternators found on pickup trucks and full-size SUVs, though verification against your vehicle's alternator output is recommended during planning. Installation requires routing the alternator output through the isolator's input terminal, then connecting both battery banks to the respective output terminals—a straightforward wiring task that keeps your accessory battery charged during driving while preserving starting battery health for reliable engine cranking in all conditions.