How RV Generators Work
Learn how onboard generators produce AC power, automatically charge batteries, and provide electricity when shore power isn't available.
Onboard generators provide shore-power-levels of electricity wherever you park. They are essential for running air conditioners and charging batteries when solar isn't enough.
Fuel Sources
Generators typically run on the same fuel as the RV: Gasoline (from the main tank in motorhomes), Diesel, or Propane (common in trailers). Propane burns cleaner but provides slightly less power and consumes your cooking/heating fuel.
Maintenance Needs
Like any engine, generators need oil changes, air filter cleaning, and spark plug replacement. Most importantly, they need to be 'exercised'—run for an hour under load every month—to prevent the carburetor from gumming up and to keep windings dry.
Automatic Generator Start (AGS)
Many systems have AGS, which can start the generator automatically if battery voltage drops too low or if the inside temperature gets too hot (to run the AC for pets).
Important Notes
- •Never run a generator with a damaged exhaust system—CO poisoning is a real risk
- •Check oil level before every long run
- •Be courteous of quiet hours in campgrounds
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