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Old 06-22-2013, 07:00 AM   #11
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Originally Posted by STG View Post
Am I correct that full load amps would be start up and running load amps would be what it backs down to?
Yes. It just takes a second (or less) to go from start up amps to running amps; UNLESS there is not enough voltage to get the motor turning. If there is not enough voltage to turn the motor, the motor will lock up. Amperage will climb to its locked rotor amperage (58 amps in my case) and the circuit protection will open.

It takes seconds to minutes for an AC circuit breaker to open depending on the degree of overload. If you have ever heard a circuit breaker "humming" you will know what I mean.
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Old 06-22-2013, 07:01 AM   #12
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Originally Posted by f1100turbo View Post
Although I don't believe the op in that his may draw 28 amps I think its whoey that it should be considered "normal"
Then mine is no good too.
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Old 06-29-2013, 03:13 PM   #13
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While selling fireworks in 100+ degree heat, we wanted to make sure we had AC. Herk, is this enough genny?

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Old 06-29-2013, 03:46 PM   #14
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probably but the cords to long and the electrons will get lost on the way to the camper.
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Old 06-29-2013, 06:00 PM   #15
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I am thinking; yes.
But don't hold me to it...
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Old 07-01-2013, 04:58 AM   #16
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STG,

Did you find the correct starting amperage required? Any documentation to substantiate it? I found only the same info you did at the AIRXCEL site.

My 2013 2109S has the exact same model number AC as yours. I am looking at buying a gen and I am being told that the Yamaha 2400 will run it. Kind of hard to believe considering what you are experiencing.

Thanks
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Old 07-01-2013, 10:21 AM   #17
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STG,

I just spoke to a seemingly very knowledgeable tech at AIRXCEL about our specific model. He said that to figure start up current draw, multiply running amps by 2.5!! This equals 31 amps if running our units on low speed fan!

Next, in an hour or so from now when they open in Ca, I will talk with Yamaha and ask them why they say a 2400 watt, 20 amp max gen will run a 13,500 btu AC. Your Honda 3000 is rated at 25 amp max, and you are having problems with it. Go figure.

UPDATE - Just spoke with Yamaha rep. Long story short....Yamaha 2400 and Honda 3000 are advertised to run only "most" 13,500 btu RV ACs. Gens must be sized according to specific AC unit requirements. I don't think either gen will work for us.

Thank you Coleman!
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Old 07-01-2013, 11:10 AM   #18
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It just occurred to me that the last time we used the RV we hooked up to a 20 amp household circuit with a breaker that was NOT an HVAC type. The AC seemed to run well, and we had some power to spare.

Given all of what we have discussed here, how could this possibly be??

Just for the fun of it I ran the microwave at the same time. As expected it tripped the house's breaker.
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Old 07-01-2013, 12:00 PM   #19
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Originally Posted by tperk100 View Post
It just occurred to me that the last time we used the RV we hooked up to a 20 amp household circuit with a breaker that was NOT an HVAC type. The AC seemed to run well, and we had some power to spare.

Given all of what we have discussed here, how could this possibly be??

Just for the fun of it I ran the microwave at the same time. As expected it tripped the house's breaker.
Your household circuit will allow for the momentary start up amperage of a motor. Generators and motors do NOT play well together. Your genny has to compensate for a 30 amp load being thrown at it all at one time. This means the engines governor has to apply enough throttle to get it up to its rated capacity without going over rpm and increasing the voltage and hz. and blowing everything up all in a matter of milliseconds.

Now do you think that a generator rated at 25 amps will last long trying to start a 30 amp draw very many times? How about a motor trying to start under voltage? Something has to give somewhere usually a circuit breaker on the genny or another overload safety like whats built into the hondas.
Even running within specs a 25 amp max motor on a 25 amp max generator is hard on each other because of the initial draw all at one time the genny has to build up. There is a time where the motor is severely under voltage.
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Old 07-01-2013, 12:09 PM   #20
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Thanks for the further clarification.

I happen to already own one Honda eu2000i. Probably gonna buy another and run parallel. 4000 watts and 33.4 amps max ought to do it. If not, I will make some start up mods to the AC.

Also will probably convert both to tri fuel.
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