Upgrade from 13.5k to 15k Coleman A/C units

time_to_go_now wrote:
I am looking at replacing my two 2008 vintage 13.5k air conditioners with new Coleman Mach 8 15k units. I have a 6,000 watt generator. My questions is can my 6,000 watt generator run both these units?

When I look at the specs for the 15k unit, it requires 2017 watts while running with the compressor on, fan on high speed, on a 100 degree day. That is 16.8 amps. I called the support line, and they said to expect 2 1/2 times the running load on start up. That would be a momentary hit of 42 amps! That means to me there is no way a 6,000 watt generator could handle TWO of these 15k units at the same time.

But, I was wondering if anyone has some real world data to support one way or the other.

Thanks.

Your surge amp start up----They ALL do that for a millisecond. That will not affect the power of a 6k onan. Even a 5.0 or 5.5 k onan will start and run 2 units. The Mach 8 pulls 15.9 amps at 95 degrees. At 105 it will pull 16.9 and at 115 degrees will pull 17.9 amps. Do NOT worry about running wattage. A 6500 Onan is rated at 55 amps and a 5500 is rated at 46 amps. 5k and up have never had a problem starting 2 RV AC units. I base MY statements on 36 years as a RV Tech and remember when almost ALL the class a Gas motorhomes in the 70's/80's and 90's had 5500 Onans/Kohlers or larger and never had problems staring 2 AC units. Remember, back then there were oinly 30 amp Motorhomes and the Rear AC was wired direct to the Genset and you had to have the Genset running to run BOTH front and Rear and they were capable of doing it. Doug