I just tested my 2000 watt (not pure sine wave) inverter in my 2018 Thor Four Winds 22B yesterday. Mine has one 12 v battery in the coach. I connected it to the engine battery, plugged the coach main power plug into it, and made a pot of coffee inside with the engine running. NO PROBLEM. I then connected it to the house battery and made a pot of coffee without the engine running. I plugged the pot directly into the inverter. NO PROBLEM. On the power panel it still registered full charge. I keep saying a lot of coffee, but I only made 6 cups at a time because that's what we drink in the morning. I don't know the AH RATING of the battery. It came with the coach which is a week old.
I am having a problem finding a place to mount the inverter. Mine has a off/on switch on the front so it has to be accessible. Suggest you try to find one with a remote.
During hurricane Irma I connected my inverter to my Roadtrek engine battery and started the engine. I was able to run two full size fridges, a freezer, two lights, a fan, and a 65 inch TV for 16 hours straight on about 12 gallons of gas. A lot more current is available at the engine battery.
__________________
|