The most popular generator that boondockers get is the 2,200 watt Honda inverter-generator. The 2,000 watt Yamaha inverter-generator is a good choice too, as well as the Champion 2,000 watt inverter-generator. Inverter-generators in the 2,000 watt range are limited to 30 amp service, but also have the ability to be chained together to produce 50 amps. Most boondockers opt to start with just one inverter-generator and then decide later to buy a second.
Honda makes an 7,000 watt inverter-generator while Yamaha makes a 6,300 watt. These machines are much more heavy and will require two people to lift into an RV or pickup truck. This is why most boondockers settle for the smaller 2,000 to 2,200 watt generators and then chain two of them together if they need the extra power.
However… If you want to be able to run your RV’s roof-mounted air conditioner (assuming it’s at least a 13,500 BTU system), you will need at least an inverter-generator in the 3,000 watt range or higher. It takes about 2,800 to 3,000 watts just to start such an air conditioning system, but only 1,500 to 2,000 watts to maintain. If you have a 15,000 BTU air conditioner, you’re going to need at least a 3,600 watt inverter-generator to start it up.
If your RV has two or more air conditioning units, and you want to run them all at the same time, then figure how much starting watts you need (3,000 watts for a 13,500 BTU system, 3,600 watts for a 15,000 BTU system), and add them all up. Hopefully, your RV allows you to start up each air conditioning unit separately.
Most microwave/convection oven combos installed into RVs these days are the 1,000 watt variety for the microwave, and about 1,500 watts for the oven.
Instant Pots will consume 1,200 watts for 8 quart, 1000 watts for the 6 quart, and 700 watts for the 3 quart sizes.
Coffee makers typically consume 600 watts in the smaller sizes, and 1,000 watts at the larger.
Mixers, blenders, and food processors use about 300 to 400 watts of power.
Curling irons and hair dryers will consume generally 1,800 watts of power each in the smaller to medium sized appliances, while larger sizes will drain about 2,500 watts a piece. Electric razors use about 15 to 20 watts.
Most laptops will require between 100-150 watts of power when using the AC adapter. Smartphones will consume about 20-30 watts using a charger. A 32 inch LED television will use about 28 watts, while a similiarly size OLED television will require about 56 watts.
C-PAP machines will use between 30 to 60 watts.
Run it One-At-a-Time
All the above being stated, you can generally get away with a single 2,000 to 2,200 watt inverter-generator.
If you’re using any cooking device that requires heating something up, then turn off other devices first, or else it’s possible you could pop a fuse. Any appliance that uses a heating element will generally require a lot of watts.