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Brief answer looks like no. Depends on what you are trying to measure (SOC or energy metre). It also looks like your batteries need attention - +ve and -ve should be at opposite ends so the batteries are charged equally. Shunt should be at the negative end. It also looks like you need to ground the batteries so that they are in the loop with the Orion.
should have said all batteries are grounded to chassis
the Orion charges all 4 batteries with 70 amps with schaudt electroblock and auxiliary charger/ on the move
on ehu the 2 schaudt units produce 40 amps
this is 2 banks of batteries 24 inch apart joined with 110 amp cable
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