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DryCreek's avatar
DryCreek
Explorer
Mar 09, 2017

Generators - brand differences?

OK, our search for a used Class A is becoming narrower each day. After driving all over, I think that there are two fairly close to us that fit our needs and budget:

The leader is:
2007 Damon Daybreak
Next runner up is:
2006 Winnebago Sightseer

Both are the ideal within our length (30 to 34 footish), made in the midpoint of the 2K model year, and have seatbelts in the dinette booth in case we take friends or relatives along for an extended day trip.

Each of the two we've narrowed it down to have pluses and minuses. One thing I hadn't come across before was the brand of generator being anything other than Onan. The Damon has a Generac Guardian 4800 with 113 hours, and the Winnebago has the Onan 4000 with 503 hours. Does brand really make a difference? I had almost convinced myself to only look for coaches built on the Workhorse chassis because I prefer low-end gruntlike torque that can be produced by a big displacement V-8, but as yuo can see I've settled on two built on the Ford F-53 chassis with the V-10. So, I can get over stereotyped brand loyalty. I've just never run across Generac branded gensets in an RV. I've only ever noticed the Onan brand name. I have seen a bit of the Generac brand in home and commercial standby generator service though. Is there really enough of a difference to sway anyone's choice between coach brands, given all other things are pretty much the same (well, except for mileage and genset hours)?

My wife is a bit uncomfortable with the higher miles on the Winnie (74K vs. 17K), but I like their fiberglass roof over the TPO covered luaun roof of the Damon. Of course, either choice for roofing is much better than the years of RV's we've owned with the EPDM covered roof, and those were far better than the metal seamed roof on the earliest units we owned (i.e. '67 Shasta Ultralight 13' or the 1974 Terry)..

When we go look again this weekend, I plan to have them start the generators in both units and listen to them inside and outside of the coach. We will probably test drive those units too. For added info - the Winnie also has a Banks kit installed (full or?) and the non-ducted AC isn't hard-wired in, but is plugged in separately. According to the brochure I found online, I think that the unit is 30 amp, just like the Damon. I don't see being able to run both A/Cs with that.

So, opinions? I'm all ears at this stage of the search. And, I'm about worn down from looking at so many units......

20 Replies

  • Mileage of either unit wouldn't both me. Onan is in a league of it's own, but Generac wouldn't sway me away. Don't get too convinced comparing the power utility models with the consumer models. They are built for completely different torture. I'd be concerned how well Thor is supporting Damon units built before the fall...especially the proprietary parts. With units 8+yrs, it comes down to how has THAT particular RV stood up....LCRA?
  • we have worked on many onan's that blew up. mainly just replaced them. fortunately for customers they were still under warranty
  • We killed 2 Onan 4000's...complete junk because they don't have an oil pump. Replaced the 2nd one with an Onan 5500 EFI model, best decision we ever made!
  • Onan, Kolher, Genirac, even Honda and a few other brands, made Rv and Marine gensets

    many different ones
  • Are you in an area of Texas that gets high summer temperatures? I'm assuming by the wattage of these two gennies that these motorhomes only have one rooftop A/C on each, for a Class A in warmer climates that A/C unit may not be up to keeping your passengers cool...:E
  • KD4UPL wrote:
    I would rate the Generac product as inferior to the Onan. That's mainly coming form my experience as an electrical contractor with larger stationary gensets. Generac sells a lot of generators, largely due to great marketing and extremely low price. In the home generator market you'd be hard pressed to find a less expensive generator than a Generac. Most servicing professionals I know see many more problems with Generac units than other brands.
    The Onan generator in my own camper has been flawless and it's 14 years old. All I ever do is change the oil.

    That was my experience selling the Generac Guardian home standby units. They were our most popular line due to price but also created the most service calls. Onan has an excellent reputation but have lots of room on the credit card if service is required once the warranty expires.
  • KD4UPL wrote:
    I would rate the Generac product as inferior to the Onan. That's mainly coming form my experience as an electrical contractor with larger stationary gensets. Generac sells a lot of generators, largely due to great marketing and extremely low price. In the home generator market you'd be hard pressed to find a less expensive generator than a Generac. Most servicing professionals I know see many more problems with Generac units than other brands.
    The Onan generator in my own camper has been flawless and it's 14 years old. All I ever do is change the oil.


    So, would it be a deal breaker, or would you use that as a negotiating tool towards a lower selling price? I am pretty mechanically inclined, so most problems shouldn't be outside of my abilities. As far as parts, I wonder how many are off the shelf sourced parts rather than proprietary designs? I work at a power generating station (2400MW to the grid from two units), so there are some parts resources I can tap if needed.

    FWIW, we have 6 Generac gensets leased where I work. They have never failed to start. They are 1.2MW V-12 Cummins, 480VAC/3 phase.
  • I would rate the Generac product as inferior to the Onan. That's mainly coming form my experience as an electrical contractor with larger stationary gensets. Generac sells a lot of generators, largely due to great marketing and extremely low price. In the home generator market you'd be hard pressed to find a less expensive generator than a Generac. Most servicing professionals I know see many more problems with Generac units than other brands.
    The Onan generator in my own camper has been flawless and it's 14 years old. All I ever do is change the oil.
  • FWIW our 96 Southwind has the original Onan 5500 generator. It works great and has not given me any problems.
  • As long as neither generator is propane fueled, either generator should do very well for you. Never buy a gas or diesel coach with a propane generator as you will absolutely live to regret it! Don't ask me how I know!!!! Gas coaches should have gas generators. Diesel coaches should have diesel generators. PERIOD!