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Cocky_Camper's avatar
Cocky_Camper
Explorer II
Mar 29, 2018

Replacing rear 13,500btu with 15,000btu A/C?

We are going to replace both A/C's on our motor home within the next month. It currently has a 15,000btu in the main area and a 13,500btu in the bedroom. We are considering going ahead and putting a 15,000btu in the rear bedroom area too while we are at it.

Are there any CON's to this that we should be aware about and consider?

We mostly camp at 50amp sites, but a lot of state parks only have 30amp. Can we run 2 15btu off a 30amp site? We were about to run a 15 and 13.5btu in the past.

Thanks in advanced.
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  • dougrainer's avatar
    dougrainer
    Nomad
    Mar 29, 2018
    The 15K pulls about 1.5 to 2 amps MORE than the 13.5k. Regardless of what you have done in the past, running a 15k and a 13.5k is NOT advisable on 30 amp service. The 15k pulls about 14 amps and the 13.5k about 12 amps. That puts you at 26 amps BEFORE you add in the refer(2.5 amps) and the Power Converter (1 to 2 amps) and any other 120 appliance(coffee maker/ kitchen cooking appliances/ ANYTHING else that needs 120 power. While you have done it, I will bet the 50 to 30 adapter, the 30 amp pins show heat and wear. Doug

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