I have a 30 amp 5th wheel. I just spent a week in SE Tenn and we tripped the pole breaker twice. We had the water heater and fridge on elec, the AC was on along with the TV. With the microwave on and the AC compressor kicks on, POP goes the breaker. Just remember to turn off the AC for a bit. Did I mention that my forgetter works perfectly.
I've also tripped the breaker on my generator before. Mostly I forget about the fridge being on automatic, the microwave and the Air Cond will run at the same time with the gen unless the fridge is on elec. Momma doesn't like it getting to hot while cooking, and I do like eating. If I could just remember that fridge being automatic. Oh well the breaker seems to jog my memory.
We spent 3 nights/2 days boondocking. No TV, radio ran a couple of hrs, minimal lights mainly a LED and a florescent. Ran the water pump for showers and dishes, Fantastic fan and a Cool fan in the bedroom 3 nights. With 2 12v batteries the voltage was at 12.3 when we left. 12.0 volts is considered a 50% charge and the max that I like to draw them down too. I have a 2,000 watt cont inverter but don't even take it with us. It will draw 2 amps or about 25 watts just being turned on and not in use. We have a 12 TV in the bedroom if we want to watch something.
1 fully charged 12 battery on my inverter will make 2 pots of Mr Coffee and start the 3rd before the inverter kicks off due to low voltage @ 10.5 volts. As stated, anything with a heating element is not your friend. All appliances should have their wattage listed on them. Amps X volts = watts or 2 batteries will have a bit over 100 amp hrs to get to a 50% charge. At 12 volts this means a bit over 1200 watts for 1 hr. Boondocking would be more appropriately called electrical management training.