312QBUD with resi fridge. Question about inverter

yes but res fridges are so well insulated vs rv fridges, if you don't open them up much they will stay cold and frozen for 8+ hours, I'm switching to a res fridge, although I have solar and my inverter has a built in transfer switch if I loose shore power, this is where those "lithium batteries" really shine, you can also add another bank of batteries, I like to run 2 banks with an a/b iso switch so you can charge one bank while using the other.