GENERATORS / GETTING STARTED
What size inverter generator does your RV need?
Start with the appliances you want to run together, then check the extra power needed to start motors. Your RV’s shore-power connection alone does not tell you which generator to buy.
Make a short power list
Write down each appliance’s electrical input from its label or manual. Separate continuous loads from occasional ones. Include the RV’s battery charger: plugging in an RV can start charging its battery even when you haven’t switched on a kitchen appliance.
Use input power, not a microwave’s advertised cooking output. Honda’s wattage guide distinguishes running demand from starting demand and gives estimates for common RV appliances. Treat those estimates as a starting point; the specifications for your actual equipment take priority.
Check two generator ratings
Rated or running watts describe the continuous load a generator can supply. Maximum or starting watts describe its short-term capability. A large number in a product name may refer to maximum output, so read both specifications.
For an illustrative load list, suppose your chosen appliances draw 900 W, 300 W, and 100 W together. That is 1,300 W of running demand. If the 900 W appliance requires 1,800 W during startup, the momentary total becomes 2,200 W—not 3,100 W, because its starting demand replaces its running demand during that moment. These numbers demonstrate the arithmetic, not a recommendation for any particular RV.
Treat air conditioning as its own question
An air conditioner’s startup demand can be much higher than its running demand. Check the exact air-conditioner model and any installed soft-start equipment before selecting a generator. Don’t assume an RV-ready outlet or a familiar BTU rating guarantees compatibility. Ask the equipment manufacturer to confirm the combination when the available margin is small.
You can also change the load list. Running a microwave separately from other demanding appliances may reduce the capacity you need. Choose a plan that everyone using the RV can follow.
Before you buy
Compare continuous output, starting capability, outlet type, carrying weight, and the operating limits in the manual. Check the campsite’s generator rules and permitted hours. Fuel choice and operating conditions can affect available output; use the rating that applies to your intended setup.
Ready to compare models? See popular RV generators from Honda, Yamaha, Champion, and maXpeedingrods.
Portable generator placement matters
Operate portable fuel-burning generators outdoors, away from occupied spaces. CDC guidance calls for at least 20 feet from windows, doors, and vents. Account for neighboring RVs too, and direct exhaust away from people and openings. Never run a portable generator inside an RV, storage compartment, or enclosed shelter. Keep working carbon-monoxide alarms in the RV and follow the generator and RV manuals.
Sources
Editorial note: This is a planning guide, not a hands-on product test. Example loads are illustrative.