dude ive tried this at least 3X and had problems 3X. the programming on the add a battery circuit only works with AGM or lead acids. it will flatline your lifepo4. ive even confirmed it with both the yellow and black kits.
what you should do it just do lifepo4 for both and add a sterling APD.
https://www.sterling-power-usa.com/SterlingPower12voltalternatorprotectiondevice.aspx
Ditch the overcomplicated ACR. just go full lithium. full lithium works very nicely and as long as you use a good fusing system (class T) on terminals to the max rating of your BMS you will be ok. dump the victron smartshunt. with bluetooth smart lifepo4s you dont need it. dump the overcomplicated wiring. just do 0AWG from both lithiums to a blue seas dualbus hub at the back and one more in the front. then branch off those. one main trunk line, one bus connecting the batteries and everything will work great. use this as your start battery -
https://dakotalithium.com/product/d...ar-truck-battery-plus-deep-cycle-performance/ and this one as your house -
https://ca.renogy.com/pro-12v-200ah-smart-lithium-iron-phosphate-battery-w-bluetooth-self-heating/
ive got 4 boats with full lithium and zero problems for any of them. rip the lead bandaid off.