the acr serves the same purpose as the traditional diode isolator but without the voltage drop. Also it has priority charging of the start batt and then thhe aux
I intend to use a deep cycle for my aux batt because I want to be able to operate the radio, sonar, lights, maybe a 12v fridge, and whatever else for extended periods of time without worrying about the batt..... I may at some point add troll'n'tabs but will have to add a third batt at that time.
Below is a crude sketch of my wiring plan. Sorry it looks so bad but it's hard to draw with a 2" touch pad.
batt switch.JPG
BTW FWIW on my big welly, I have 3 monster group 31 deep cycles for house batts and 1 lil group 24 starting batt for both merc 260's and the genny