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Old 07-17-2015, 09:04 AM   #1
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Can a Yamaha 2000 run my AC?

We have a 13500 AC unit and already own a Yamaha 2000kw. Will this power up our AC? If so, I'll be psyched as the generator is easy to transport and I already own it!
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Old 07-17-2015, 09:08 AM   #2
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Probably not. The high draw on startup will damage the compressor, I have heard.
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Old 07-17-2015, 09:10 AM   #3
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It might work if you use one of these:

MSH-M Series Inverter/Charger - Magnum Energy, Inc.

It uses the battery to supplement start up loads.

Eric
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Old 07-17-2015, 09:23 AM   #4
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The Coleman specs list their 13,500 unit at 10.8 amps running. The Yamaha provides a rated 13.3 amps operating... So, even if the 16.7 amp surge rating of the Yamaha would handle the start up current of the A/C compressor, which I don't believe it will, you would only have 2.5 amps reserve capacity. So you'll be tripping the overload any time anything else comes on... Lights, water pump, microwave, toaster, coffee maker, TV. It's just too small a unit for that much load.

Unless it wasn't a typo when you posted "2000 kW"... That would run a small town!.

-Red, full of good news...
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Old 07-17-2015, 09:23 AM   #5
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I can always pick up another unit and run them in tandem. This way I have have two lightweight generators and can generate about 3600 kw. If we don't need the AC, I can always just use one of them.
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Old 07-17-2015, 09:30 AM   #6
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There you go!

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Old 07-17-2015, 09:43 AM   #7
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The Yamaha 2000 will not start a 13.5K A/C unit alone, but their 2400 will. There a few folks on these Forums that are doing just that.

A single 2000 in conjunction with a Magnum MSH3012M hybrid inverter/charger WILL start and run your roof A/C (even a 15K unit) by supplementing the power available from the Yamaha and seamlessly adding power to meet the requirements of the A/C unit.

You will either need a very large lead based battery bank (600 amp/hours +) or lithium battery pack of at least 400 amp/hour to accomplish this.

A second companion generator is far more cost effective if you're not going for the solar/battery/inverter upgrade.
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Old 07-17-2015, 11:23 AM   #8
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Not just any Yamaha 2400 gen will start and run a 13,500 ac. It has to be the Yamaha 2400hc (high capacity) gen. I have one and it will start and run my 13,500 a/c.
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Old 07-17-2015, 11:27 AM   #9
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Quote:
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We have a 13500 AC unit and already own a Yamaha 2000kw. Will this power up our AC? If so, I'll be psyched as the generator is easy to transport and I already own it!
Keep in mind that a generator should never be used for more than 80 percent of it's output.

The second and most important thing, is when you plug the trailer into a generator, what all are you supplying power to?

If only the AC is on, your still supplying power to the "Univolt" as well.

Depending on the battery condition, the Univolt can draw as much as 6 amps, or 720 watts, all by itself, plus the AC.

Andy
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Old 07-17-2015, 11:29 AM   #10
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2000 watts will _____

Your 2000 watt genset will run the AC, just not the compressor. You can turn the fan & also the heat strip, if one is installed.

I bought a 3000 watt Dometic sine wave inverter genset in 2011. It can run a 15,000 BTU AC, no problem. This genset has electric start + a recoil rope backup starter.
Noise is very low except when load is near max.

Let's Roll !
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Old 07-17-2015, 11:42 AM   #11
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Don't the Airstream's come with a Generator installed? I've looked at Airstream's for years and always assumed there was a built-in Onan 6 KW to hand the load. Even a 3KW Generator is pushing it's limits. But at least that will work. A 2K forget about it.
Or is this a backup Generator? You could take two 2K Generators and hook them up in Parallel to handle the extra load....but don't run out of gas on either one.
David
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Old 07-17-2015, 11:59 AM   #12
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It will run the fan , tv , lights but will kick off when you turn the air on. You will need to add the second generator for the air.
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Old 07-17-2015, 12:22 PM   #13
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I doubt it will run the air conditioner, but maybe. I have the 3000 honda that does well, but cannot run microwave or coffee maker at the same time. If you invest, look for a sister to yours and a connection kit. Sometimes you only need one, and they are easier to carry. I wish I had bought two honda suitcase 2000's instead of my 3000.
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Old 07-17-2015, 12:46 PM   #14
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Don't the Airstream's come with a Generator installed? I've looked at Airstream's for years and always assumed there was a built-in Onan 6 KW to hand the load.
David
Only the Motorhomes have generators. Not the trailers. Well, there was a 12 volt generator option built in for a few years in the early 70's. It was not popular nor was it a good generator.
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