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Old 08-04-2015, 05:58 PM   #1
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Generator sizing

Just a curiosity ...my 2009 HR Navigator has 3- 15K AC's, A washer & dryer, Microwave, etc. and it only has a 10KW Generator. As I read articles about Prevosts, and Newells, they start with a 17.5 KW Generator and go up from there. Other that a 4th AC, what else do they have that takes so much power? We do have a gas stove, and I remember when we were looking at coaches, we noticed that if it was similarly equipped but also had an induction stove they usually had a 12.5KW Generator. I also notice they plug in to the same 50 amp service at a CG and seem to run everything. Any ideas? Thanks...Bob
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Old 08-04-2015, 06:31 PM   #2
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We are all electric, three A/C, induction cook top, electrically heated floors, etc. I have a 10K Onan. There has not been anything I have turned on that didn't work when on generator. I suppose if I tried to run all three A/C, heated floors, fire place, induction cook top, convection oven, washer and dyer, hair dryer, dish washer, etc all at once my EMS would probably shut one on the A/C down I'm guessing.
So, I guess if you can afford a Prevost, or hi end Newell then there is probably no such thing as "too much power"
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Old 08-05-2015, 10:29 AM   #3
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Thanks, I guess that's it. I see where they also run 2 rather large sized inverters, which I guess would only be useful if dry camping a lot. I suppose that gives you bragging rights
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Old 08-07-2015, 10:20 AM   #4
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Your 50A shore power delivers a max of 12,000 watts, so your 10 kw genset is close. Should be plenty for all needs.

Some Prevost & MCI coaches have 240v electric stoves, 240v residential dryers, and their Aquahot heating systems have electric as well as diesel as it's power source. Heated tile floors too. Not just Prevost, MCI & Newell either - I know of American Eagles and American Heritage coaches with all those things, and I'm sure Newmar has similar high end models.
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Old 08-07-2015, 11:51 AM   #5
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Our coach also has the 10kw Onan. Last month in Texas we ran 3 ac units, the water heater on electric and everything else DW uses with no problems at all.


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Old 08-08-2015, 05:22 PM   #6
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Thanks Gary, I had not thought about the dryer. Ours runs on 110 volts. We also have the electric side for the aqua hot and the heated floors; however our stove is gas. We also must shut off the rear AC in order to use the dryer, so I'm guessing the Prevosts and other very high end coaches can run all 4 AC's plus the range, Oven, and Dryer all at once...talk about multi-tasking...
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