2 - 12v batteries wired in parallel. Should the Aux cable be used in this setup, or, since I’m basically just increasing the run time of the 12v system, is it necessary. Any changes made to how the settings should be configured?
2 batteries in parallel, add the capacity together, so if you have 2 x 150Ah batteries then the capacity in the SmartShunt is 300Ah. No other changes to the settings.
There is no need to connect the aux terminal to either of the parallel batteries. In the settings just make sure it still says the aux is set to none.
Perfect, this is what I expected, but was looking for verification. Thanks!!