Smartshunt As a second battery voltage monitor

The smartshunt can measure voltage of a second 12v battery, having the first bank at 48v

First of all, there is nothing to be said against it.
It is only a voltage measurement at the additional input. However, note the common connection of the “minus” of the load output and the additional battery.

I think the Smartshunt is already in the system to measure the 48V. :thinking:

Yes, but I want to know if it is possible to monitor the voltage of another 12v battery with the smartshunt auxiliary

Only with the same mass (-)

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Information given here can be verified in the manual
3.5.1. Auxiliary connection for monitoring the voltage of a second battery

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The problem is that Smart battery sense is VE.Smart Network only.
If using the Cerbo GX the VE.Smart Network is not an option