2 x Batteries installed by an electrician to feed the AC
1 x Battery installed by an electrician to run a Inverter to power House plugs in the Van (Fridge etc)
The Fridge for reference is
advwin-90l-mini-fridge-freezer
<>...
"I see no reason to get a separate inverter. Simply get a 24V and run it off the battery. The loads of your other devices will probably be very low."
Only reason to seperate is incase of excessive battery drain / lifespan on the battery from running the air conditioner, if all three batteries...
To whom might be able to give input!
I am currently in the R&D stage of our MWB MR VW Crafter and I believe we will be purchasing the below
dometic-coolair-rtx-2000
<> https://www.dometic.com/en-au/outdoor/rv-and-van/rv-air-conditioners/dometic-coolair-rtx-2000-190063
and three of the below...