Jan 11, 2022 · The average RV AC is a 13,500 BTU unit which uses about 2,750 watts to start and 1,250 watts once up and running. To get an average, we will split the difference and say it uses around 2,000 watts to run. To run one 13,500 BTU air conditioner for five hours a day, you are using 2,000 watts for 5 hours.