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When your old RV Onan quits—maybe right in the middle of your trip—this direct replacement brings back quiet, reliable power for your RV AC, fridge, and more, so you can keep exploring with all the comforts of home, no hookups required.
If your old generator finally gave out, this Onan QD 6000 fits in the same spot as your original. You'll still need to hook up the fuel line, electrical, and exhaust, but the major work is already done for you. Enjoy the comforts you count on—morning coffee, fully charged devices, and lights on at any hour. Plus, it has enough power to run two 15,000 BTU air conditioners at once, so you can beat the summer heat and stay comfortable wherever you park.
After a long drive or when the weather turns wet and rainy, nobody wants to wrestle with a bulky generator. With one-touch start, automatic timed glow plugs, and remote switching capability, powering up is always simple, rain or shine. All you have to do is press the power button and relax. And the built-in shutoffs handle low oil, overloads, and engine quirks automatically, so you can settle in for the night with your fridge cold, your CPAP on, and no worries about unexpected shutdowns.
This generator uses sound-dampening technology and a special muffler to help keep things peaceful. You won't have to raise your voice for campfire stories, cut conversations short, or lose sleep to engine noise. It also meets National Park Service noise guidelines, so you can experience brilliant fall foliage in the Great Smoky Mountains or visit the steaming geysers at Yellowstone without worry.
From routine oil changes to swapping out the air filter, service is straightforward. No need to be a mechanic—just basic tools and a few minutes are all it takes to keep things running strong for years to come. And with built-in self-diagnostic capability, troubleshooting issues is faster and easier so you can spend less time on maintenance.
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Kate F- Product Enthusiast at etrailer.com
If you’re someone who loves the mountains as much as I do, camping off-grid, chasing cool mornings, and staying comfy in the heat of the day then the Onan QD 6000 might just be your perfect travel buddy.
This generator really shines in high elevation camping, which is something I get asked about a lot. Folks want to know things like, “Will my generator actually work up at 8,000 feet?” And the QD 6000 honestly holds up great. It’s diesel-powered, liquid-cooled, and automatically adjusts engine speed based on your load, which helps it stay efficient even when the air gets thin and dry.
One of my favorite things about this generator is how surprisingly quiet it is for a diesel. You can sit outside with your morning coffee, enjoying the sunrise and not feel like you're camped next to a lawn mower.
It’s also ready for those crisp mountain mornings we all love. The built-in glow plugs make cold starts easier, and if you’re camping where temps dip below freezing, just add a diesel anti-gel additive to your tank. That small step makes a big difference and helps your generator keep doing its job.
If you're not sure whether the QD 6000 or the 8000 would be better for your setup, feel free to reach out, I’d love to help you find the best fit for how and where you camp.
Chris R-Product Enthusiast at etrailer.com
If you’re boondocking in places like Twin Lakes, CO or Flagstaff, AZ, and running a diesel Class C like the Tiffin Wayfarer 25RW, the Onan QD 6000 is a great fit. It’s built for both high elevation and hot temps, which is exactly what you run into in those mountain and high desert spots.
All generators lose a bit of power at altitude, about 3 to 4% per 1,000 feet, but this one holds up better than most. It’s liquid-cooled, diesel-powered, and adjusts engine speed based on your load, which helps when you're running things like two A/C units, a fridge, and a microwave. Just be smart with your power, and soft start kits on the A/Cs make a big difference.
It’s also quiet enough for national parks, and the built-in spark arrestor makes it safe for national forests and dry camping out west.
If you want a generator that handles elevation, thin air, summer heat, and powers what you need without breaking a sweat, the QD 6000 is one I always recommend.
Do you have a question about this Generator?
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Rob W.
7/7/2025
Hi Kate, I really need help here. I’ve got a Tiffin Phaeton 40 IH, and we do a lot of dry camping, I know we have 3 A/C units, a residential fridge, and I think our hot water and heat run off a system called Aqua-Hot? We usually like to run the microwave, charge devices, stuff like that. I’m trying to figure out if the Onan QD 6000 would be enough for what we need, or if I should be looking at the 8000 watt model instead. I just don’t want to overload it or have to keep turning things off and on. Any advice?