Our coach still has a propane cooktop, but residential frig. Our frig is much more efficient than the side by side that most RV manufacturers are using. We have 550 watts of solar and a 765 amp battery bank. When boondocking we do not run the gen the first day, but run it an average of 2hrs on subsequent days. Our inverter charges at 130 amps. We only charge to about 90% because after that the charge rate drops and it takes too much time to "top off" the batteries and with the 765 amp battery capacity it really isn't necessary.
We plan on getting rid of the propane and going with electric induction cooktop, but I don't think that will change the charging time as we will probably only use the cooktop while running the gen.
BTW, ask this salesman how well the True Induction cooktop that Winnebago uses actually cooks. I ask because it is a 120 volt model and has two 900 watt burners. Most stand along (portable) Induction cooktop you see at RV shows are 1800 for a single burner. Tiffin uses a Summit model SIN2220, which per Summit is 220 volt only, but it has high output burners (only issue I have here is what happens when you are on 30amp service?).
ken