On Board Generator vs Portable Generator

I love the convenience of our LPG fueled built in Onan. However I opt to use the portable when the larger genset isn't needed like for charging batteries.

To me an on-board unit is hands down better in a toy hauler when it draws off the gas fuel tank. If you're talking about a regular fifth wheel or TT with a propane generator I'm not sure it makes as much sense.

A properly installed built-in genny should not be loud, or shakey, or put fumes into the interior. Our 4K Onan in our Class C is very well-mannered, so we're able to run it whenever we need it.

It's amazing that folks when shopping for a new rig will opt to spend the extra big bucks that a built-in genny costs and then after they've bought it complain that it's worthless whenever they try to use it. How about having the dealer start it up before they buy and then rejecting the RV if they don't like what they hear, feel, and smell from the generator? Maybe RV manufacturers would eventually get the message and begin doing things differently.

"Sucks LP like no tomorrow, louder than a thrashing machine and shakes the TT!!"

LP does use more than gas. Loud? I would say box is not insulated very well. Shakes? Something is wrong with the gen or the mounting.

With the 6500 above only comparison to yours is it does like to use LP.

If I boondocked a lot I would have bought the diesel version.

I will never again spend that kind of money for an onboard LP Onan!!! We have the 3600 in our TT. Dealer talked me into it for the convenience. That's about all it is, convenient!! Sucks LP like no tomorrow, louder than a thrashing machine and shakes the TT!!

Our first TT, 2010 Springdale I used twin Honda 2000's, one being the Companion. Worked great!! 2nd TT was a 2014 Nash. Mounted a Honda 3000 on the tongue over the LP tanks. Worked even better!!

Due to the different configuration on our 2016 AF I could not use the 3000 on the tongue. Idaho summers can get hot, even at altitude. Too hot for me anyway so I run my AC 3-4 hours every afternoon. At 1 to 1 1/2 gallons per hour you can't last long without an accompanying propane truck!!

I had a hitch fabricated to the frame of the TT rated at 500/5000. So now when the weather gets hot I'll be packing Hondas again!! :M

Don't know if the gas versions do any better but stay away from LP!!!

Ours installed generator is gasoline powered. It's far easier to get gas at a Flying J than to refill propane cylinders. Plus there are more BTU's per gallon of gasoline. It's just more efficient.

It seems most toy haulers either come with or are set up to use gas powered gens as I think in my opinion is the only way to go for a toy hauler. Fifth wheel campers usually are set up with/for LP gens as they don't have the rear mounted gas tanks like the toy haulers do. Have a couple friends with the LP gens and all they ever did was complain about fuel usage and having to carry so much LP.

Very little noise comes out of our built-in Onan's exhaust pipe - the Onan design does a good job muffling that noise. I wouldn't buy a Gen-Turi for noise reduction ... only for routing the exhaust away up high in crowded camping conditions.

Most of the noise from our Onan is the huge amount of cooling air that it's fan exhausts out the bottom of the open-at-the-bottom outside cabinet that the generator is mounted in. However, this volume of air is what helps keep the Onan purring along hour after hour running the A/C in searing heat ... which is going to be occuring more and more in the future the way things are going. Parking on a soft surface helps reduce this air flow sound coming from underneath - probably throwing a rug down on the ground under it would help muffle this reflected sound.

Commercial Cummins/Onan 6500 LP 240V

I like it a lot!

It makes the tone deeper and raises the exhaust to the roofline. I've never used a decibel meter to compare the sound.