Victron Energy ▶ ARGOFET Series Victron Argofet 200-2 Battery Isolator 2 Battery Banks | 200A Max Current | Ultra-Low Voltage Drop The Victron Argofet 200-2 Battery Isolator is an advanced solution for charging two independent battery banks from a single alternator or charger, without connecting the battery banks directly. Designed for 12V or 24V systems, this FET (Field Effect Transistor) isolator ensures that your starter battery remains fully charged while simultaneously charging your auxiliary battery, making it ideal for marine, RV, and off-grid vehicle applications. Unlike traditional diode isolators, the Argofet 200-2 virtually eliminates voltage drop, ensuring that your batteries receive the full charging voltage from your alternator. This maximises charging efficiency and prolongs battery life, providing reliable power management for critical systems. CORE BENEFIT: FET technology ensures virtually zero voltage drop, maximising charging efficiency. Key Features ▶ Zero Voltage Drop — FET technology ensures minimal power loss and maximum charging efficiency. ▶ Two Battery Bank Isolation — Safely charges two separate battery banks from a single source. ▶ 200A Maximum Current — Handles high charging currents for robust power systems. ▶ Alternator Energize Input — Provides necessary voltage to the alternator's B+ terminal for reliable charging start-up. ▶ Automatic 12/24V Detection — Compatible with both 12V and 24V DC electrical systems. ▶ Robust M8 Bolt Connections — Ensures secure and reliable electrical connections. Technical Specifications Parameter Value Product Model Argofet 200-2 Manufacturer Part Number (MPN) ARG200201020 System Voltage 12V / 24V (Auto-detect) Maximum Charge Current 200A Maximum Alternator Current 200A Number of Battery Banks 2 Connection Type M8 Bolts Dimensions (H x W x D) 65 x 120 x 200 mm Weight 1.4 kg FET Technology & Operation The Victron Argofet 200-2 utilises advanced FET (Field Effect Transistor) technology to achieve superior battery isolation. Unlike traditional diode isolators which incur a voltage drop of approximately 0.7V, FET isolators have an extremely low voltage drop, typically less than 0.02V. This means that the voltage reaching your batteries is almost identical to the alternator's output, ensuring faster and more complete charging cycles. A crucial feature of the Argofet isolators is the Alternator Energize Input. Many modern alternators require a DC voltage on their B+ output to begin charging. When a battery isolator is installed, it prevents this return voltage from the batteries to the alternator. The Argofet's special current-limited energize input addresses this by providing the necessary voltage to the B+ terminal when the engine run/stop switch is closed, ensuring the alternator starts charging reliably. Typical Applications Application Area Description Marine Vessels Ensures reliable starting power while simultaneously charging service batteries for onboard electronics. Recreational Vehicles (RVs) Maintains the vehicle's starter battery while powering habitation loads from a separate leisure battery. Off-Grid & Commercial Vehicles Ideal for work vans, trucks, and mobile workshops requiring dedicated power for equipment without draining the main starting battery. Built-In Protection Functions The Victron Argofet 200-2 is designed for robust and safe operation. Its FET technology inherently provides efficient power transfer with minimal heat generation, contributing to its reliability. The isolator's primary function is to prevent discharge of the starter battery by isolating it from auxiliary battery banks, ensuring critical starting power is always available. The inclusion of an alternator energize input further enhances system safety and functionality by ensuring proper alternator operation. Common Questions What is the main advantage of a FET isolator over a diode isolator? The primary advantage is the virtually zero voltage drop. Diode isolators typically cause a voltage drop of around 0.7V, which reduces charging efficiency and can lead to undercharged batteries. FET isolators maintain the alternator's output voltage, ensuring optimal charging. Do I need to modify my alternator when using the Argofet 200-2? No, the Argofet 200-2 is designed to work without needing to increase the alternator's output voltage. Its "Alternator Energize Input" feature ensures that alternators requiring a DC voltage on their B+ terminal will start charging correctly, preventing common issues found with other isolator types. Can this isolator be used with both 12V and 24V systems? Yes, the Victron Argofet 200-2 is designed for automatic detection and compatibility with both 12V and 24V DC electrical systems, offering versatility for various applications. What is the purpose of the 'Alternator Energize Input'? Some alternators require a small DC voltage on their B+ output to initiate charging. Without this, they may not start. The Argofet's energize input provides this necessary voltage, ensuring the alternator begins charging the batteries as expected when the engine is running. Installation Notes Professional installation by a qualified electrician or marine/automotive technician is highly recommended. Ensure all cable lengths are kept as short as possible and use appropriate cross-section wiring to minimise voltage drop, especially for high current applications. Mount the isolator in a cool, dry, and well-ventilated area, away from direct heat sources or flammable materials. Always follow the detailed wiring diagrams and safety instructions provided in the official Victron Energy manual for correct installation. Verify all connections are secure and properly insulated to prevent short circuits. Before You Buy Confirm your system voltage (12V or 24V) and ensure it matches the isolator's capabilities. Verify your alternator's maximum output current does not exceed the isolator's 200A rating. Ensure you have two battery banks that you wish to charge simultaneously from a single source. Consider the physical dimensions of the isolator (H65 x W120 x D200mm) to ensure adequate mounting space. Review the wiring requirements and ensure you have suitable M8 ring terminals and heavy-gauge cabling for your installation. Specifications are subject to change by the manufacturer. Always consult the official Victron Energy documentation for the most current details and installation guidelines. This product typically carries a 5-year manufacturer's warranty.
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