Cummins Onan RV QG RV QG 5500 Gasoline EVAP Generator. The RV QG series, formerly Onan Marquis Gold, has a fully integrated design to make it the quietest in its class. Runs one or two 15,000 BTU air conditioners with power to spare. Features: Enclosed muffler Low vibration levels Self diagnostic capabilities to simplify troubleshooting Digital voltage regulation for stability as appliance loads change. Gasoline fueled. The RV QG 5500 EVAP is for C.A.R.B. (California Air Resources Board) compliant applications. Model 5.5HGJAB-6755.