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Old 08-16-2017, 11:08 AM   #1
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AC Overloads 3100 Watt Generator

I have a 2008 Jayco 24RKS. We have never used the AC in camp because we always camp where it is cool and comfortable.
For the first time, we are headed to an area that is a little warmer. The eclipse is forcing us to be with the crowds of Idaho.
I just bought an almost new Champion 3100 and have installed the high altitude jet because we live at 4,500 feat elevation and tend to only go higher. I also added the SUPP6 Hardstart Relay from Supco. That is what I ordered but there is no name on the soft start capacitor unit. The AC is from RV Products.

Why does the AC overload the generator when I turn it to cool? I get 120v AC in everything until the compress kicks on. Then the overload light on the generator comes on and the 120v line drops. I have turned off the breaker for the microwave, inverter and the water heater.

What am I doing wrong? Did I buy the wrong hard start relay? How do I know which one to buy?

Thank you for your assistance.
Jeff
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Old 08-16-2017, 11:25 AM   #2
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Altitude may have some effect! I know my 3000 wont start my 15k needs 2900 watts to start it.
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Old 08-16-2017, 11:34 AM   #3
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Are you using the 30 amp outlet on the generator and not one of the two standard 15 amp outlets? I live at 4750 feet in Nevada and with the Supco capacitor, I was able to fire up the 13.5 AC with my Champion 2000w inverter. Outside temp will also affect the genny
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Old 08-16-2017, 11:46 AM   #4
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We have a Champion 3100 we bought new. We live at ~3,600ft and without the high altitude jet, runs fine at the house to run the trailer's 13.5 AC. We ran the generator primarily to charge the batteries all last summer in 'economy mode' without a problem at ~7,800ft.

As a test, we tried the AC briefly at ~7,800ft last summer with the 'economy mode' off and it started our 13,500btu AC without a problem without the high altitude jet. BUT, it didn't run for more than a couple of minutes due to the CG generator restriction hours.
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Old 08-16-2017, 12:27 PM   #5
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Try turning off your converter at the breaker as well. Also make sure your refrigerator is on gas not auto.

Our 2000W Champion will run our 13.5 A/C unit pretty well with the hard start capacitor installed.
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Old 08-16-2017, 01:51 PM   #6
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Quote:
Originally Posted by Subaru297 View Post
Try turning off your converter at the breaker as well. Also make sure your refrigerator is on gas not auto.

Our 2000W Champion will run our 13.5 A/C unit pretty well with the hard start capacitor installed.
I would turn off all of the breakers in the trailer except the AC - and try again.

Your Generator is actually rated a max of 2800 running watts.

A Fridge on AC runs 325-400 watts
Most 13.5k AC units use 1700 watts in the running state, but can pull 50Amps at startup / stabilization.

You "should" be able to run just the AC on the generator, unless that starting capacitor is the wrong type for that AC unit.
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Old 08-16-2017, 03:56 PM   #7
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Maybe a dumb question but do you have the eco switch shut off? The inrush current is high enough it will trip out on overload in eco mode. I can run my 13.5K AC with a 2000 Honda in run mode.
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Old 08-17-2017, 07:43 PM   #8
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Should have bought a Honda. They don't fudge their specifications.
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Old 08-17-2017, 10:13 PM   #9
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I have no issue running my 13.5k A/C with my 3100 Champion Duel Fuel. Make sure your not in eco mode.

Another Honda owner bashing on Champions, don't be mad you paid twice as much for a generator with the same capabilities. Oh wait, you can't run on propane, my bad. I've had both, and Yamaha as well, Hondas were once the King, they got too comfortable. Super nice generators but no way worth twice the cost anymore.
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Old 08-18-2017, 10:16 AM   #10
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Generator

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Originally Posted by Screwby View Post
I have no issue running my 13.5k A/C with my 3100 Champion Duel Fuel. Make sure your not in eco mode.

Another Honda owner bashing on Champions, don't be mad you paid twice as much for a generator with the same capabilities. Oh wait, you can't run on propane, my bad. I've had both, and Yamaha as well, Hondas were once the King, they got too comfortable. Super nice generators but no way worth twice the cost anymore.
I have to agree been running Honda's for twelve years.Selling my 2000, buying the Predator 3100 Inverter Harbor Freight 647.00.I need two 2000's to start my 15k AC.Not worth a grand more to me!
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