While 13,500 BTU is the most common size for modern travel trailers and fifth wheels, units can range from 10,000 to 15,000 BTU. Efficiency Ratings and Smart Usage.
Powering Your RV Air Conditioner: Generator Sizing and Shore Power Considerations
8 kWh (kilowatt-hours) of energy per day. Once the compressor is humming, the running amperage typically drops to a range of 30 to 50 amps.
Generators must match or exceed the startup surge; a 2,000-watt portable generator will likely fail to start the compressor, whereas a 3,000-watt or larger unit is usually required. This is why most RVers rely on shore power or a generator.
Powering Your RV AC: Generator Size vs. Shore Power
Calculating Wattage and Daily Consumption To translate amperage into a more familiar metric, you calculate the wattage. A typical car battery provides around 60-80 amp-hours, which is insufficient to start a large RV AC unit.
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