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Old 06-15-2009, 10:12 PM   #1
NewSkewlHauler's Avatar
Join Date: Feb 2009
Location: Goodland, KS
Posts: 233
Year: 1988
Coachwork: Bluebird
Chassis: GMC
Engine: 8.2L Detroit N/A, Allison
Rated Cap: 65
Running Rooftop AC down the road...

I'm getting really close to getting my bus...i can almost taste it...mmm diesel. Anyway, now that it's getting warmer, I'm thinking about air conditioning. How do you run a rooftop AC while en route to your destination? Can you run something that large off an inverter? If so, how large of an inverter and/or battery bank would be required? Would I need a genny to power the beast? Thanks in advance...

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Old 06-16-2009, 09:08 AM   #2
Join Date: Feb 2005
Location: Winnemucca, NV/Reno NV
Posts: 161
Year: 1980
Coachwork: Gillig 1980
Chassis: 636
Engine: Cat 3208 NA
Rated Cap: 78
Re: Running Rooftop AC down the road...

It can be done, but you're way better off using a generator. It will take around a 3000 watt inverter and massive battery bank, which won't last long without charging. Or a moderate/large battery bank and a second alternator, which will need to also have high output. Remember, this alternator will consume engine power, and many of our Skoolies are already a bit underpowered. I'm going to build a generator bay, but for now I put my generator on a hitch mount cargo carrier. Have not used it on the road, but it should work just fine. Generator is the easiest and cheapest way to go. A third possibility is an add on engine driven compressor system. I think these are mostly used for a dash vented driver area A/C system, not whole bus cooling..
If it isn't grown, it has to be mined
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Old 06-16-2009, 09:40 PM   #3
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Join Date: Sep 2006
Posts: 704
Re: Running Rooftop AC down the road...

You'll find that even the big Class-A Motor homes use the genny to power their roof a/c's when moving down the road. They all have dash air but that won't do much for the size of the unit. I got a genny bay ready, but have not mounted my genset in there yet.

You just might be a Redneck if...
...your motor home used to be a school bus!
...Your living room has a steering wheel!
...Your home has brake lights

1994 Jeep Grand Cherokee
1989 Thomas Diesel Pusher (Cat 3208/Freightliner)
Chesapeake, Virginia
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