We have the Onan 5500 on propane, We dry camp two or three times a year. We replaced the 30lbs bottles with 40lbs. We can get about 14 hours on one bottle. That costs about 25 dollars each to fill. We also take two extra bottles that we swap out during the stay. We can get three to four days with four bottles . Propane here in Tennessee is right around $3.00 per gallon. a 40lbs bottle holds just over 9 gallons. Long story short, Its very convenient and we really enjoy ours.
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