It's easier to plan for a bigger load than to not plan for it and find that you need it!
We have discovered that we need to plan to be able to run a commercial pour over coffeemaker in the bus. Its a 110VAC unit but the heating element flat sucks the power. I will have to be able to make coffee by the liter! I now have a nice collection of 3 liter airpots! I don't drink it, but the auction folks do like to buy coffee on a cold morning!