30 amp hookup

[H. John Kohl]

Yes I feel you will be ok. You mention the refrigerator - remember it can work off propane if their is a demand for 30 amp on other electrical items. But that should not be needed.
The first thing that happens when you plug in is the water heater pulls power to warm the water if on. The converter is recharging the batteries.
You may have to power manage the fireplace, microwave, coffee pot, or other heaters.
Good luck and enjoy.