If you can swing even one
Battle Born you'll save yourself a lot of headaches. I don't know which rig you've got but you might have a Lithium switch on your power center (our 3121 does). If so it would be a direct drop in.
We had two Battle Born's in our class C and could easily make it through the night and that includes a 12V dual compressor refrigerator/freezer, fans, furnace lights TV.
Never really knew we had "battery anxiety" until we didn't.
