I have the Onan 5500 evap. It does everything I have ever asked it to do and has never failed me after 5+ years and approx 250 hours. I feed it non-ethanol gas and keep StaBil marine formula stabilizer in the gas at all times. It is also run for 1 hour under load on the first of each month when I'm not using it during the month. Later this month I will be at a car race for 5 days with no hookups. The grand children will be with me and they must have television so.....it will get 40 hours or so on it during the 5 days.
2006 GMC 2500HD CCSB 4x4 Duramax/Allison, Titan 52 gallon fuel tank, Prodigy Controller, B&W Companion Hitch
2010 Jayco Designer 35RLTS, Cummins/Onan RV QG 5500 EVAP, Progressive Industries EMS-PT50C, TST Systems 507 TPMS, RV Flex Armor Roof