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The Argo FET 200A is a solid-state battery isolator that lets one alternator or single-output charger charge two battery banks at once without tying them together. It uses field-effect transistors instead of diodes, so the voltage loss is far smaller than with an Argodiode: under 0.02 V at low current and about 0.1 V at higher currents. That matters on boats and vans where a diode isolator can leave the house bank undercharged. It suits owners of two-bank systems who want simple, automatic charge splitting and are willing to pay more than a diode isolator for the efficiency.
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Lowest price we've seen: $119.99 on Nov 10 at West Marine. Tracked across 1 store since Nov 10.
Owners rate it highly and treat it as a reliable upgrade over diode isolators, mainly for the small voltage loss. Few complaints surface beyond the price and the need to wire the enable signal correctly.
The Victron Energy Argo FET Battery Isolator is a two-battery, 200 A model. It lets one alternator or a single-output battery charger charge two or more batteries at the same time.
The batteries are charged without being connected together. The isolator has virtually no voltage loss compared with Argodiode battery isolators. The voltage drop is less than 0.02 V at low current and averages 0.1 V at higher currents.
