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Running Your Travel Trailer AC Unit on house outlet?
Posted on 1/19/26 at 9:12 am
Posted on 1/19/26 at 9:12 am
Over the summer I was able to acquire a 25ft travel trailer. The AC unit on top is 13000BTU. Trailer is 30amp and I got the dog tail for shore power to plug into a house outlet. I've run the AC while we were loading it for a trip and someone stayed the night in it with the AC running and everything went fine. Now I've heard you shouldn't run the AC unless you are on a 30amp because it could damage the capacitor. I looked at the breaker in the breaker box and it is 20amp and the outlet its plugged into is also 20amp.
From googling, a 13000 AC runs on about 12.5 amps and the starting amps are 18-20.
Am I fine to keep running it as long as I don't run anything else in the camper or should I stop using the AC while it is plugged into my house?
From googling, a 13000 AC runs on about 12.5 amps and the starting amps are 18-20.
Am I fine to keep running it as long as I don't run anything else in the camper or should I stop using the AC while it is plugged into my house?
Posted on 1/19/26 at 9:38 am to Yammie250F
Where are you that you need ac this time of year??? And the overwhelming majority of 30a plugs will not fit into a 20a receptacle.
Posted on 1/19/26 at 9:58 am to MoarKilometers
South Louisiana. Don't need it now but will when summer comes around.
I have a dog bone adapter. Allows you to plug it in to a regular outlet.
I have a dog bone adapter. Allows you to plug it in to a regular outlet.
Posted on 1/19/26 at 10:07 am to Yammie250F
I do it for the same reason you are doing it.
Posted on 1/19/26 at 10:14 am to Yammie250F
You’ll be fine running it off a 20amp for the scenarios you’ve described. Just don’t try to run the water heater (on electric) or any other appliances for that matter along with the AC.
Not sure where your camper is parked in relation to your main panel, but a 30amp is fairly easy to run if you wanted to go that route.
Not sure where your camper is parked in relation to your main panel, but a 30amp is fairly easy to run if you wanted to go that route.
Posted on 1/19/26 at 11:07 am to Yammie250F
I run my camper AC for about 30 minutes twice a month when not in camper in a park.
Will you be running AC full time when it warms up again? If so, change your receptacle out to a 20A and you're good.
Will you be running AC full time when it warms up again? If so, change your receptacle out to a 20A and you're good.
Posted on 1/19/26 at 1:27 pm to Bandit1980
quote:
Will you be running AC full time when it warms up again? If so, change your receptacle out to a 20A and you're good.
No, only when loading it to head out for camping. And maybe at night if someone needs it to sleep for a night although that won't happen often. I've already changed the receptacle to a 20A.
Posted on 1/19/26 at 1:31 pm to Yammie250F
13000BTU in my camper runs just fine on on 15 or 20 amp outlet. I put a Kill-a-watt on my outlet to see what I was drawing and the camper with just the AC running pulled at max about 1300 watts.
Safe continuous usage you should be good for about 80% of an outlet's rated capacity. 15 amp = 1800 Watts. 80% of that is about 1440 Watts.
Safe continuous usage you should be good for about 80% of an outlet's rated capacity. 15 amp = 1800 Watts. 80% of that is about 1440 Watts.
Posted on 1/20/26 at 8:37 am to Yammie250F
Had the same thoughts years ago I added a soft start and made sure the outlet was 2o amps and have had no issues.Used when working on interior and when getting ready to roll. Just replaced because of age 9 year old and the roar and installed a Tosot and wow what a difference quiet and has a heat pump.
Posted on 1/20/26 at 2:11 pm to Yammie250F
It depends on how long a run it is from the breaker in the house to the unit. Most likely you will be fine but if you have a 50 foot 14 gauge drop cord its most likely not going to cycle due to voltage drop and will probably kick a 20 amp breaker. If its say 30 feet from the panel to the outlet and 30 feet from there to the unit without any kind of drop cord other than the camper cord it will be fine except in the hottest part of summer...heat will also add to voltage drop and increased current. I run ours on a 20 amp cicruit at the house for days on end in the summer and it never trips but the outlet is about 20 feet from the panel in the garage, the cord on the RV is about 15 feet to the panel in the RV and the AC is about 20 feet from the breaker in the RV. That's about 55-60 feet total. I have a 10/3 drop cord 50 feet long and if I add that in the circuit it will kick the breaker. Ours is in direct sunlight in the summer in the driveway and it will only cool it down to about 74-76 degrees if it is 95 outside, about 20 degrees is about as good as it gets....woefully underinsulated. Thats one 13,000 BTU unit in a 36 foot motorhome. It has 2 units and I can unplug the one at the rear and plug it into the drop cord and a 20 amp outlet on a separate circuit and they will both run but the 2 of them only drop the temp down to around 72 when its 95 degrees outside. Too much roof surface, not nearly enough insulation. Under shade and 95 outside the 2 of them running will drop the temp to about 66-68 degrees.
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