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Old 09-02-2016, 12:00 PM   #1
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Onan Generators - 5500 or 7000 gas generator

Just about decided on a coach now deciding on generator option. Going to 7000 adds $1,350 to MSRP. Is it worth it? We will be choosing a 3513 Canyon Star as of now. 5500 unit will power both airs and have 1100 watts left over. Both are quiet. The 5500 uses 25% less fuel - overnight run would save about 4 gallons of fuel on normal full day of driving in warm weather and overnighting in the coach.

I don't think both airs will run as much on 35 coach anyway. We will have the polar pak ceiling insulation and do dual pane windows. Choosing a 10 cu ft. frig. Coach has 10 gallon hot water heater. We will have standard two tvs. The similar model in a Bay Star only offers the 5500 as an upgrade, from 4000. Since, Canyon Stars have mostly 39 foot models - I am assuming this is why the upgrade is offered as they have more toys and 15% more coach to cool and heat.

I am looking for opinions and what size coach you have.

Thanks!

Gamaliel Kid.
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Old 09-02-2016, 12:06 PM   #2
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We have a 35ft with 2 ACs and a 5500. Since we live in the southwest we end up running both ACs all the time. Never had an issue running 2 ACs and the microwave for a total of 22 Amps on the first leg (10A AC, 12A microwave) and 10A on the second leg. The only other high-amp draw we could turn on would be the hot water heater, but I'd just as soon use the propane if I'm on the generator. I am not sure what I would end up using additional amps for, maybe washer/dryer? I don't have that, so maybe that would tip it over the top.
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Old 09-02-2016, 12:15 PM   #3
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We have a 35ft with 2 ACs and a 5500. Since we live in the southwest we end up running both ACs all the time. Never had an issue running 2 ACs and the microwave for a total of 22 Amps on the first leg (10A AC, 12A microwave) and 10A on the second leg. The only other high-amp draw we could turn on would be the hot water heater, but I'd just as soon use the propane if I'm on the generator. I am not sure what I would end up using additional amps for, maybe washer/dryer? I don't have that, so maybe that would tip it over the top.
We are looking at Washer/Dryer option - will probably do that. But I figured we would be using them on shore power. If not, I guess this is where the 7000 would be useful.

Thanks for your input.
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Old 09-02-2016, 01:06 PM   #4
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Our previous coach was on an 5500 with two air conditioners, microwave, washer dryer. Etc. Never had a capacity problem. Would not use w/d on genny, would use w/h on propane.
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Old 09-02-2016, 04:58 PM   #5
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Onan Generators - 5500 or 7000 gas generator

I say get the 7000. If you do any camping in high altitudes, the generator will lose quite a bit of power, and the 7000 will have the reserve to still produce the power you need at 7000 feet above sea level.

The generators will lose about 3% of their power for each 1000 ft above sea level
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Old 09-02-2016, 05:23 PM   #6
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I'd go for the 7500 as well. The premium on the upgrade is really not that much for a diesel. This is one area where I personally would not skimp. This also would allow you to use external power items like power tools, who knows what.

You may camp next to friends that would need some juice if you're dry camping.
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Old 09-04-2016, 11:15 AM   #7
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We have the 5500 and camp at 7000 to 8000 feet altitude all the time with no problems. Use tv's, microwave and Both airs with power to spare.
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Old 09-04-2016, 01:08 PM   #8
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We have the 5500 and camp at 7000 to 8000 feet altitude all the time with no problems. Use tv's, microwave and Both airs with power to spare.

Are you using ethanol blended gasoline (E10 or higher) or ethanol free gasoline? Ethanol has less energy per gallon than gasoline, so when mixed with gasoline power goes down as well. Your chassis engine will probably get less MPG as well on Ethanol blends.
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Old 09-04-2016, 04:47 PM   #9
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Never had a problem...
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Old 09-04-2016, 09:28 PM   #10
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I thought they both have same engine. Elevation have any diff?
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Old 09-04-2016, 10:29 PM   #11
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I was raised by a master electrician and original member of the million volt club. This is what he taught me: when assuming power draw total ALL power consumption with everything ON. Then size your generator so that you never exceed 2/3 of generator output. This way you don't stress generator, breakers, or any sensitive electrical/electronics.
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Old 09-05-2016, 05:56 AM   #12
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I thought they both have same engine. Elevation have any diff?

I just looked up the specs. They have the same displacement, however they are rated at different power levels. The 5500 is rated at 12.9 bhp and the 7000 is rated at 14 bhp
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