What would be the correct settings for using this in my Sprinter RV as a power source? I want grid charging primary when connected to the grid…PV when not. Here’s my story…bought unit after a lot of research as a power station for my sprinter camper van, aka, fly fishing the mountain steams in Idaho, etc. Need 3-5 day off grid capable setup to power dometic dual zone fridge , espar heater, lighting, fans, etc. Wanted quick grid charging if ability presents itself. Can use induction cooktop inside on rainy/cold days…probably a grid thing but possible. Last, with a few extra batteries at the house, I can pull it out and use it during power outages but my main reason for the purchase of the AC300/B300 was for the RV.