Victron Energy Argofet 200-3 Three Battery 200A Battery Isolator ARG200301020R

The Victron Energy Argo FET Battery Isolator 200-3 is designed to charge three separate battery banks simultaneously from a single alternator or single-output battery charger without directly connecting the batteries together. This allows accessory battery banks to be discharged without also discharging the isolated starter battery.

The ARG200301020R corresponds to the Argo FET 200-3 configuration, rated for a maximum charge current of 200A and a maximum alternator current of 200A, with support for three battery banks. Victron specifies M8 bolt connections for this configuration.

Key Technology

• Three-Battery Isolation
  Allows three separate battery banks to receive charging current from one alternator or compatible single-output battery charger while maintaining electrical separation between the batteries during discharge.

• 200A Current Capacity
  Rated for a maximum charge current of 200A and a maximum alternator current of 200A for compatible high-current charging systems. 

• Low-Loss FET Technology
  Uses FET-based battery isolation rather than conventional diode isolation, substantially reducing voltage loss between the charging source and connected battery banks.

• Very Low Voltage Drop
  Victron specifies less than 0.02V voltage drop at low current and an average of approximately 0.1V at higher currents. 

• No Alternator Voltage Compensation Normally Required
  Because the Argo FET introduces very little voltage loss, Victron states that alternator output voltage does not need to be increased specifically to compensate for the isolator. 

• Alternator Energize Input
  Includes a special current-limited energize input designed for compatible alternators that require DC voltage at the B+ output before charging can begin.

• Independent Battery Discharge
  Battery-bank isolation helps prevent loads connected to an accessory battery from simultaneously discharging the starter battery or the other isolated battery banks.

• M8 High-Current Connections
  Uses M8 bolt connections for integration into properly designed high-current DC charging systems.

Best Uses

• High-Current Three-Battery Systems
  Suitable for systems where a high-output alternator or compatible charger needs to supply three separate battery banks while maintaining electrical isolation between them.

• Starter & Multiple Auxiliary Batteries
  Ideal for installations with a starter battery and multiple auxiliary or house battery banks supplied from a common charging source.

• Marine Battery Systems
  Useful for properly configured onboard electrical systems with multiple independent battery banks requiring charging from a common alternator.

• Vehicle & Mobile Power Systems
  Suitable for compatible vehicle electrical systems where high-current alternator charging needs to be distributed among multiple battery banks.

• Single-Output Battery Chargers
  Can distribute charging from a compatible single-output battery charger to three electrically separated battery banks.

• Alternators Requiring B+ Excitation
  The dedicated energize input supports compatible alternators that require DC voltage at B+ before charging can begin.

Product Specifications

Low-Loss Three-Battery Isolation for High-Current Charging Systems

The Victron Energy Argo FET Battery Isolator 200-3 provides an efficient solution for distributing charging from a common alternator or compatible single-output battery charger to three independent battery banks. Its low-loss FET architecture, 200A current capability, alternator energize input, and robust M8 connections make it well suited to properly designed high-current multi-battery DC charging systems.

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