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Old 10-23-2014, 04:20 PM   #1
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Join Date: Oct 2014
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AC size and Generator requirement

Hi all,
Let me start by saying that I am new to TT ownership. I have bought a used 2011 XLR 27HFS which is in great shape , but did not come with much in the way of owners manuals.
I plan to do some boondock camping, and would like to purchase a generator that is capable of running the air conditioner.
The first question I have is how can I tell the size of my air conditioner, ie is it a 13,500 or 15,000 BTU?
Second, how can I determine what size generator that will require. I'm really only concerned about the AC, I can run the fridge and water heater from propane.
I was thinking of getting two of the Yamaha 2000 inverter style and connecting them together. Would this run my AC? Dpoes anyone know if the Honda generators can be joined together?

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Old 10-23-2014, 04:37 PM   #2
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I have 2014 27 HFS and I run a Onan 4000 generator with no problems running everything at once. I believe the A/C is 13500 btu and as for the Honda generators they can be hooked together because I looked at them before the Onan. I went with the onan because the trailer had the Gen prep package and got a heck of a deal on the Onan.

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Old 10-25-2014, 12:08 AM   #3
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Location: Northern Calif.
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Our tt came with the Onan 4400 installed. If I had it to do over I would have deleted the generator and purchased two Honda 2000's. The Hondas are much quieter, and would not be right under the bed.

It would also allow the option of taking the generators or not depending on the cg .

Two 2000's linked together will run a 13.5 ac with no problem. Not sure how you could tell the size without climbing on the roof and removing the cover and looking for model number etc. If you had or have a surge protector that monitors amp draw you could see the number of amps at start up and running. If you don't have the ems protection I would highly suggest you look into one.
John And Mary
2013 XLR 27 HFS

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Old 10-25-2014, 05:11 AM   #4
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Yes. Both the Honda and Yamaha 2000's can be run in parallel and will power your A/C. It's also nice to have the 2 so you have the option of running just 1 for charging if you do much boondocking. They are very quiet and fuel efficient. Spendy.. but worth it IMHO.
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Old 10-25-2014, 05:22 AM   #5
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My choice of "boondocking" type generator would be the Yamaha 4500, but it ain't cheap. I hit a lot of dirt bike races where there are no hookups. The onan is obviously the best choice.. built in, quiet, etc. i used a Chinese 3500 for a while, and it did work, but I worried about reliability until I could get something better. I currently have a champion 3100 to power my '13 27hfs. It is "RV" ready. The reviews are pretty good; and champion has excellent cust. serv.
Yeah, you can't use the microwave and AC at the same time, but it gets the job done. And, btw, I always bring that Chinese generator as a spare

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Old 10-25-2014, 07:34 AM   #6
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My Yamaha EF2400iS will run my 13,500 BTU generator at 3500' elevation with no problem. I will start the genny and let it run for 5 minutes or so to somewhat charge the trailer batteries, cut the fridge to propane only, and make sure all other 12 and 120 volt loads are gone.........especially the water heater on electric. I switch on the AC fan beforehand, and leave on continuous run so that additional start-upsdo not tax the genny when the AC kicks on.


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