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Am installing the Orion-tr Smart Isolated DC-DC Charger in my trailer. I have three 100ah lithium batteries in parallel. Do I connect the red positive cable to positive on the first battery and the black negative cable to the negative on the third battery or both connections on only one of the batteries?
If you have a battery monitor (highly recommended), you'd connect to the system side of the shunt not the battery negative.
Wiring Unlimited is an excellent guide.
