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Old 12-02-2013, 06:14 AM   #1
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Exclamation Generator requirement size

Good Morning All.
My wife & I just bought a new 40 ft. 5th wheel, 2ac's and everything else. I would like to know the best size generator to run everything and also make for reliability.
Thanks Chuck

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Old 12-02-2013, 06:38 AM   #2
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Chuck... Since all of our rigs are just a bit different in electrical consumption I am thinking the only way to fit your rig with a "run everything" gennie is to perform a power consumption survey. If i had to guess at the size the might run almost everything....a 7000 watt gennie might do you well. The site usually agrees that Honda is amongst the best gennies available. My 34ft rig offered a 5500w ONAN and it will allow one of the AC units to operate and just about everything else...including the microwave at the same time. I have never performed a full power consumption survey because I have never planned on running everything at the same time.

Craig Gosselin
1994 Fleetwood 33H
1995 Fleetwood 30H (parts vehicle)
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Old 12-02-2013, 06:49 AM   #3
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Do you just want to be able to run everything, or do you want to be able to run everything at the same time. If the former, a 3 KW generator will (just barely) run everything you have. A 4 KW would give you a little cushion.

If you want to run both A/Cs, and the microwave, and some other stuff all at the same time, then a 10 KW might do it, while 12 KW certainly will.

Retired electronics engineer. Avid paddler & birder.
2011 Silverado 2500HD, diesel, 4x4,crew cab, 8' bed
Palomino Puma 253FBS (27' 5er) & '94 19' Class B
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Old 12-02-2013, 07:25 AM   #4
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Welcome and glad to meet you!
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Old 12-02-2013, 07:29 AM   #5
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Hi Chuck! Welcome to IRV2! We're sure glad you joined the gang!

Congrats on the new 5er! Hope you enjoy the forum!

Good luck, happy trails, and God bless!
Joe & Annette

2002 Monaco Windsor 40PBT, 2013 Honda CRV AWD
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Old 12-02-2013, 07:30 AM   #6
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We have a 38 foot MH with an Onan 5500 generator built in. When I exercise the genny every month I run two AC units in the summer or two 1500 watt heaters in the winter and usually crank up the microwave or coffee pot as well. The genny handles it all just fine.
Bruce Dickson 2013 Thor Challenger 37GT, 5 Star Tune, Safe-T-Plus Steering Control with Air Trim, Roadmaster front and rear Sway Bars, SuperSteer rear Track Bar, Crossfires, 2012 Honda CRV on Blue Ox Aventa LX tow bar. Full timers since Jan 2012.
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Old 12-02-2013, 07:52 AM   #7
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My Onan 5500 handles both ACs and everything else at the same time without problems.

John & Cathy R.
06 Pace Arrow 38L W24
08 Lincoln MKX AWD
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