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Both my house battery and my chassis battery are using the same negative ground on my RV. chassis. If I were to connect a second Pos wire from the chassis battery to the shunt (by the house battery )without running an additional negative cable from the chassis battery, will I be able to monitor the second battery?
If both batteries share a common negative point then you can connect the second positive wire to the second battery and you will be able to monitor its Voltage.
Please note, you can only monitor the Voltage of the second battery, not the current, you cannot share the shunt between the two batteries.
The negative of the second battery must connect directly to the chassis. The negative of the first battery connects to the chassis via the shunt. Just wanted to clarify that.
