Argodiode 120-2AC 2 batteries 120A Retail ARG120201020R

Victron Energy Diode Battery Isolator Argo 1202AC. Two batteries, 120A

Diode battery isolators allow simultaneous charging of two or more batteries from one alternator, without connecting the batteries together. Discharging the accessory battery for example will not result in also discharging the starter battery.