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Old 02-08-2010, 02:10 PM   #1
BillA
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Yamaha EF2400is

Will a Yamaha EF2400is run a 15,000 BTU A/C unit?
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Old 02-08-2010, 06:16 PM   #2
cptxguys
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Bill,
I have two and one of them will run the AC. It won't run ANYTHING else.

I think it also will depend on outside temperature, altitude, etc., but mine works OK here in TX.

I used the two of them 'twin tailed' together to run the AC and other devices (TV, charger, etc).
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Old 02-09-2010, 10:19 AM   #3
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I looked at the Yamaha's units a while back. The main reason I passed was the very significant price differential between Honda and Yamaha. Have they gotten closer now? The higher amp rating was nice but not at almost half again the cost of the Honda at the time.
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Old 02-09-2010, 10:38 AM   #4
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Wisesales.com has the Honda EU2000i (1600 watts continuous) at $889 and the Yamaha EF2400is (2000 watts continuous) at $1195. On a $/watt basis the Yamaha is bit more expensive (about $80 more than it should be). But if you have to buy two Hondas to power a 15,000 BTU A/C vs one Yamaha then the equation shifts in favor of the Yamaha.
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Old 02-10-2010, 07:31 PM   #5
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a 15k a/c will typically draw around 13 amps, and may draw up to 18, so at 18 x 110 volts your at 1980 watts, give or take a little. Most all Gen's are rated at 80% capacity which is 1920 watts out of 2400. So, will it run it, yes, is it hard on it, yes. Your better off with a 3k gen IMHO
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Old 02-11-2010, 09:40 AM   #6
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rockyman

I would like to go to a larger genset but the portability of those units is a greatly diminished due to weight. Going from 2400 watts to 2800-3000 watts the weight goes from 70# to 140-150#. I can reasonably handle 70# but 140#...not so much. Anything in that weight category or higher would need to be a permanent installation. This does raise several other questions in my mind regarding safety and the use of gasoline powered equipment in or around the rv.

(1) Are there permanent gasoline fueled genset installations in rv's out there?
(2) Where to store poratable gensets (RV basement or tow vehicle) and the necessary gasoline can?
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Old 02-17-2010, 06:16 AM   #7
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Bill,

I agree with Rockyman's comments. I use a Honda 3000 and it will handle a 15K AC but it pulls pretty hard to start it. We can also watch TV and use MW. I wouldn't want any less for the AC.

2 Honda 2000 are a good bet. They will give more than a 3000 but can use just one if no AC req and they are light to lift.

I put a sealed sheetmetal compartment in the front of the fiver that is vented when the door is closed for the gas. When I run it the door is open and the 3000 is on a slide out. It runs under the 5th wheel and exhausts out the street side. No lifting, No issues. Compartment is sealed to stop any fumes from getting inside. Could do the same with the other gennys.

Beats the built in high $$ ones.

Bill
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Old 02-17-2010, 02:48 PM   #8
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there may be self contained built in units but I have not seen one, you could build a sealed box, lengthen and relocate the muffler, and do other mods but its gonna cos$$ you have to think about how your gonna fuel it, ive tried this, you pretty much have to have an oversize box or a slide tray ! You can mount a gen on the back of the 5th with a rack, which is what i do, I have a power cord attached and ran under my 5th and stubbed out by my shore cord receptacle so I do not have to pull out my cord, just a short jumper i built, this gets a lot of comments. Or, just go traditional and set the gen off to the side of your 5th or leave in the back of the truck, just make sure to devise an anti theft solution!! good luck!!
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Old 01-12-2011, 04:44 AM   #9
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Ya sure, it will work but it is pretty hard to start it, it will handle a 15K AC unit
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Old 06-26-2012, 06:36 AM   #10
bigocean
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I've read on line about adding or changing out the startup capacitor on the AC units to help with start up of the AC compressor That's were most problems occur with smaller generators, like the Honda 2000 and Yamaha 2400is. Some folks have had success with a "better" booster start up capacitor on 13,500 and 15,000 btu AC's. Anyone out there changed out the capacitor?
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Old 01-02-2013, 10:39 AM   #11
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My Yamaha EF2400is is three years of age and the new types fix the matter with a small period raise, which does not help me. The uncommon factor is my EF2400is ran my 13,500 but system excellent until this year
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