Our favorite travel trailer ever is a 27 foot Sunset Trail trailer from Crossroads RV (30 foot tongue-to-bumper, but 27 foot usable floor) and this unit come standard with a single 15,000 BTU. But as an option you can get a second 13,500 BTU A/C (I don't know why they are different sizes, but who cares...). BUT, when you choose the 2nd air conditioning option, it comes with a forced upgrade to a 50A service instead of the basic 30A service! Moreover, what we observed yet, is local dealers tend to order this options for stock's units, but not all of them as well.A 50A service sound like a complete deal breaker for me because it drastically reduces the range of options on campsites especially for a pretty small trailer of 27 foot.Just wanted to have your quick opinion, mostly regarding the need of two AC for that size of trailer versus the fact of having a 50A service, because we saw a lot of 33-35 foot trailer with a 30A service...

50A service is generally required to power 2 AC units simultaneously, thus the required upgrade. I don't see why you would need 2 units on a trailer that small though. The addition of a 50Ax30A adapter makes any campsite usable. I use the 50A plug any time it is available for my 30A TT. They tend to be in better condition than the 30A plugs.

Unless you're planning on parking in direct sunshine in the southern part of the continent I July - August, I would think the 15,000 btu AC would be adequate. We mostly stay at state parks that have shade and our single AC does a decent job keeping our 15 year old my cool.

vlopddap wrote:Our favorite travel trailer ever is a 27 foot Sunset Trail trailer from Crossroads RV (30 foot tongue-to-bumper, but 27 foot usable floor) and this unit come standard with a single 15,000 BTU. But as an option you can get a second 13,500 BTU A/C (I don't know why they are different sizes, but who cares...). With any rig with dual A/Cs it's not unusual at all that one would be 15K and the other 13.5K but regardless, dual A/Cs demand 50 amp service as 30 amp just isn't sufficient. JMO, but having owned a 24' trailer equipped with a single 13.5K A/C that could freeze us out even under extreme conditions I don't see the need for anything more than a single 15K unit in a trailer just 27' long, and as you say you'll have a much greater choice of 30 amp sites than you will 50 amp sites. I know what my choice would be. ;)

Our Rockwood 2604 - really 26'4" box and 30'B2B - came with a 15,000 and even here in TN and traveling through TX, NM, OK and others, we found it was perfectly comfortable. Agree that the 50 AMP would be a deal breaker....too many places you might like to visit and not available. I would go with the single 15K.

I would probably pass unless you are close to full time in the hot and/or humid areas down south.Generally 15k should be fine with 27'No harm in using 30/50 adapter and just the one AC as needed.

Dual AC option on 27 foot trailer? | Good Sam Community

20 Replies

schrederman
Explorer
Jun 01, 2015
I stayed in my trailer for 8 weeks in July/August about 3 years ago. It's close to the same size you're talking about. I will NEVER have another TT this size or bigger with just one A/C. I'm looking at a Winnebago Ultra Lite 28DDBHS and really want one, but it doesn't seem to have the option of a 2nd A/C... so I'm looking at other trailers.

The 50 amp plug has one hot leg that's 30 amps like a normal trailer, and runs most of the stuff, including the first A/C. The second hot leg is usually breakered at 20 amps and is for the 2nd A/C and/or electric fireplace if equipped.
SoundGuy
Explorer
Jun 01, 2015
vlopddap wrote:
I now see that a 27 foot trailer absolutely need a second AC and moreover because the 15K is ducted front to back on this model!

I must be missing something ... why? :@

BTW, you realize of course that so-called 50 amp service really isn't, it's 50 amps across two legs for a total of 100 amp service or 12,000 watts vs 3600 watts for 30 amp service. BIG difference that requires significant upgrades to the trailer's electrical system ... but why a 27 footer would need this is a mystery to me. :h
vlopddap
Explorer
Jun 01, 2015
Thanks for all this great comments!

I now see that a 27 foot trailer absolutely need a second AC and moreover because the 15K is ducted front to back on this model!

Thank you!
APT
Explorer
Jun 01, 2015
If the price is not much more, it isn't a bad option especially if is bunk house. Then you can control the temps in different areas of the trailer, dual zone for example. As mentioned, you can use a 50A to 30A adapter for the times when the park only offers 30A service. Just can't run both AC units at the same time.
WE3ZS
Explorer II
Jun 01, 2015
I don't see it as a deal breaker at all, as fla-gypsy pointed out in the first reply a simple 50x30 amp dogbone adapter will allow you to plug into any 30 amp campground outlet. While using the 30 amp outlet you will be limited to only using one of the AC units.
I don't know why a trailer that size (27') would need a second AC unit, our 40' TT has 2 units (15k/13.5k BTU) with the 15 ducted running it has been enough so far but we haven't been down South in the extreme heat yet either. We have camped in both 30 and 50 amp sites and just use the dogbone when needed where there is no 50 amp outlet.
time2roll
Nomad
Jun 01, 2015
I would probably pass unless you are close to full time in the hot and/or humid areas down south.

Generally 15k should be fine with 27'

No harm in using 30/50 adapter and just the one AC as needed.
dadmomh
Explorer
Jun 01, 2015
Our Rockwood 2604 - really 26'4" box and 30'B2B - came with a 15,000 and even here in TN and traveling through TX, NM, OK and others, we found it was perfectly comfortable. Agree that the 50 AMP would be a deal breaker....too many places you might like to visit and not available. I would go with the single 15K.
SoundGuy
Explorer
Jun 01, 2015
vlopddap wrote:
Our favorite travel trailer ever is a 27 foot Sunset Trail trailer from Crossroads RV (30 foot tongue-to-bumper, but 27 foot usable floor) and this unit come standard with a single 15,000 BTU. But as an option you can get a second 13,500 BTU A/C (I don't know why they are different sizes, but who cares...).

With any rig with dual A/Cs it's not unusual at all that one would be 15K and the other 13.5K but regardless, dual A/Cs demand 50 amp service as 30 amp just isn't sufficient. JMO, but having owned a 24' trailer equipped with a single 13.5K A/C that could freeze us out even under extreme conditions I don't see the need for anything more than a single 15K unit in a trailer just 27' long, and as you say you'll have a much greater choice of 30 amp sites than you will 50 amp sites. I know what my choice would be. ;)
wildtoad
Explorer II
Jun 01, 2015
Unless you're planning on parking in direct sunshine in the southern part of the continent I July - August, I would think the 15,000 btu AC would be adequate. We mostly stay at state parks that have shade and our single AC does a decent job keeping our 15 year old my cool.
fla-gypsy
Explorer
Jun 01, 2015
50A service is generally required to power 2 AC units simultaneously, thus the required upgrade. I don't see why you would need 2 units on a trailer that small though. The addition of a 50Ax30A adapter makes any campsite usable. I use the 50A plug any time it is available for my 30A TT. They tend to be in better condition than the 30A plugs.

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Dual AC option on 27 foot trailer?

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