Argo FET Battery Isolator with Alternator Energiser terminal 2003 3 batteries 200A

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Victron Energy FET Battery Isolator Argo 2003 with alternator energiser terminal. Three batteries, 200A

Similarly to diode battery isolators, FET isolators allow simultaneous charging of two or more batteries from one alternator (or a single output battery charger), without connecting the batteries together. Discharging the accessory battery for example will not result in also discharging the starter battery.

In contrast with diode battery isolators, FET isolators have virtually no voltage loss. Voltage drop is less than 0,02 Volt at low current and averages 0,1 Volt at higher currents.