The Victron Argodiode Battery Isolator 140-3AC charges up to three batteries from a single alternator while keeping each battery bank independent, making it ideal for vehicles or boats that rely on a dedicated starter battery and separate auxiliary power.
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Three-battery charging from a single alternator: enables simultaneous charging of up to three batteries without interconnecting the banks.
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True isolation between banks: prevents accessory battery discharge from affecting the starter battery, preserving performance and reliability.
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Low voltage drop: uses high-efficiency Schottky diodes with about 0.3 V drop at low current and ~0.45 V at rated output.
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Compensation diode included: slightly raises the alternator output to offset diode drop and help maintain charging efficiency.
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Easy installation: place the isolator in the cabling between the alternator and the batteries.
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Engine run/stop input control: features a current-limited energize input that powers the B+ when the engine run/stop switch is closed.
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Designed for between alternator and battery banks: the isolator slightly reduces charge voltage to maintain isolation; batteries may not reach a full 100% charge depending on system conditions.
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Model: ARG140301020R
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Manufacturer: Victron Energy
The Argodiode 140-3AC keeps your starter battery ready for use while auxiliary systems stay powered, thanks to true isolation and low diode drop. The included compensation diode helps maintain charging efficiency, and the straightforward installation reduces wiring complexity. Keep in mind that the isolator can slightly reduce the charge voltage to maintain isolation, so in some system conditions batteries may not reach a full 100% charge. Important setup note: inserting a diode or FET splitter can prevent return current to the B+, which may stop the alternator from charging; improper setup can result in batteries not reaching full 100% charge and aging prematurely. For returns, repairs, or support related to this product, please contact your Victron dealer.
