Charge two battery banks from one alternator without cross-drain, with the Victron Argodiode Battery Isolator 80-2AC (2 Batteries, 80A). Designed for marine, automotive, and off-grid power systems, this isolator lets both batteries share a single charging source while keeping their circuits separate when loads are drawn.
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80A continuous rating supports reliable dual-battery charging from a single alternator.
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Low voltage drop thanks to high-efficiency Schottky diodes. Typical drop is ~0.3 V at low current, ~0.45 V at the rated output.
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Compensation diode enables a slight increase in alternator output to offset diode voltage loss, improving overall charging efficiency.
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AC model energize input features a current-limited energize input that powers B+ when the engine run/stop switch is closed, ensuring charging begins reliably.
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Prevents starter battery discharge — if you use an accessory battery, it won’t drain the starter battery.
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Simple installation — install the isolator in the cabling between the alternator and the batteries for immediate dual-battery charging management.
Notes: Insertion of the isolator can slightly reduce charge voltage due to diode drops. The compensation diode helps mitigate this effect, but some reduction may remain, potentially preventing batteries from reaching 100% full charge over time. For returns, repairs, or support related to this product, please consult your dealer.
