You could just turn off the main breakers in the RV.
Or if you are ever inclined to install an energy management system surge protector this will also stop any arcing at home and away. Power is not connected until voltage, ground and polarity is checked as stable for about a minute before power is connected.
Can you return the microwave and get a Panasonic Inverter Series microwave?
These actually reduce power consumption at the lower settings.
Otherwise 2000 watt sine wave inverter and four batteries is generally needed to run a microwave.
Needs a couple inches around the fan and vents. They don't need much unless you are charging a big battery from very low.
I would have recommended the MBA that fits in the WFCO slot. Or maybe you have something different. Powermax is a good converter.
I tend to seek out sunny spots or just partial shade now that I have solar.
Deep shade I would be in conservation mode and need to move toward the sun about the fifth day(or hookups).
Worst case use jumper cables to charge from the truck similar to the OP.
Generator stays at home for some disaster style emergency.
AFAIK it should be a fairly large but flat panel configuration.
I could see the battery integrated into an interior wall or the bedroom floor.
I try to assume it will be a Model S sized battery or about 5,000 amp/hrs at 12v equivalent.
Yea it is going to cost some money. Good luck on smallish versions.. these are made for a regular home.
Trouble with plug and play kit is that it is never quite how you would like to have.
Above kit could use a better controller and longer wire.
Beware of kits where the controller is attached to the panel as you can get too much voltage drop between the controller and battery. Controller should be separate and mounted close to the battery. Longer wire to the panels is not such a big deal.