Generators for Roadtrek RS-Adventurous
Well it seems your coach has a 16 gallon propane tank...rough calculations would have the propane generator consume fuel at the rate of 1 gallon per hour....so roughly 16 hours of generator run time.
Not sure how much fuel the main coach engine burns just idling, but it does have a larger tank to draw from.....so the engine driven unit may last longer before fuel runs out.
Which brings about another point ..... Using the main engine as your generator could leave you stranded if you forget to check how much fuel you have left....could run the tank dry...and then what do you do ? With the propane generator, when it runs out, you can simply drive to the propane dealer and buy more.
I don't like the idea of idling a large Diesel engine just to make electricity.....even the long haul truckers are finding alternatives to keeping their big engine running all night while they sleep with the AC on.
If you are leaving children or pets in the coach with the AC on, you will need the generator running while parked without shorepower.....I would be nervous with the main engine running, that a child or pet could accidentally put the transmission in gear. Using the propane fired generator, no such worry, as you keep the coach key in your pocket, and the main engine is NOT running.
Edit * thought of another consideration...
If the engine mounted generator breaks, it's proprietary technology, good luck finding places to repair it while on the road. The Onan generator on the other hand, has many more places that will repair it, and good parts availability.
I wish they would make an Onan diesel generator option, because that's what I would want....