Victron Energy Argofet 200-2 Two Battery 200A Battery Isolator ARG200201020R

The Victron Energy Argo FET Battery Isolator 200-2 is designed to charge two separate battery banks simultaneously from a single alternator or single-output battery charger without directly connecting the batteries together. This allows an accessory battery to be discharged independently without also discharging the isolated starter battery.

The ARG200201020R corresponds to the Argo FET 200-2 configuration, which supports a maximum charge current of 200A, a maximum alternator current of 200A, and two battery connections. The manufacturer's specification table confirms M8 bolt connections for the Argo FET 200-2. 

Key Technology

• Two-Battery Isolation
  Allows two separate battery banks to receive charging current from one alternator or compatible single-output battery charger while keeping the batteries electrically separated 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 there is no need to increase alternator output voltage specifically to compensate for the isolator.

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

• Independent Battery Discharge
  Battery isolation helps prevent loads connected to an accessory battery from simultaneously discharging the starter battery.

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

Best Uses

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

• Starter & Auxiliary Battery Systems
  Ideal for installations where a starter battery and separate auxiliary or house battery share a common charging source.

• Marine Battery Systems
  Useful for compatible onboard electrical systems with separate starting and auxiliary battery banks supplied from a common alternator.

• Vehicle & Mobile Power Systems
  Suitable for properly configured vehicle electrical systems where alternator charging needs to be distributed between independent battery banks.

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

• Alternators Requiring B+ Excitation
  The integrated energize input supports compatible alternators that require voltage at the B+ output to initiate charging.

Product Specifications

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

The Victron Energy Argo FET Battery Isolator 200-2 provides an efficient solution for distributing charging from a common alternator or compatible single-output battery charger to two independent battery banks. Its low-loss FET architecture, 200A current capability, alternator energize input, and M8 high-current connections make it well suited to properly designed multi-battery DC charging systems.

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