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auto gen start A/C

markm
Explorer
Explorer
Anyone using the auto gen start for A/C? I spoke with Cummins rep concerning this feature for Onan 5.5kw generator. Seems like a good way to save on LP when you don't need the generator running all night to power other items.

Application would be for staying overnight at parking lot or rest area. No shore power, only need power intermittently when thermostat calls to kick on A/C.
10 REPLIES 10

Wild_Card
Explorer
Explorer
time2roll wrote:
Yes you would save the fuel while the generator would otherwise be idling.

Although I plan to have an inverter and enough battery in my next RV to run the A/C 12 to 24+ hours without a generator.


Never happen
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Nomad
Nomad
Yes have used the AutoStart feature for staying overnight at parking lot or rest areas. Works great!
2010 Suncruiser

MrWizard
Moderator
Moderator
just a thought
but if you want auto start for A/C
you are not going to save much fuel over letting the genny run

the A/C is not going to cycle on for 15 minutes per hour
you are in a closed box, if you need A/C its going to run and compressor OFF time is going to be LESS than compressor ON time
and the fan needs 110v to stay on, or the head pressure and start up load for the next cycle is going to be very rough

auto start can be a life saver for pets, elderly, and your batteries
but i dont think its an efficient fuel save option for A/C use
I can explain it to you.
But I Can Not understand it for you !

....

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time2roll
Nomad
Nomad
Yes you would save the fuel while the generator would otherwise be idling.

Although I plan to have an inverter and enough battery in my next RV to run the A/C 12 to 24+ hours without a generator.

beemerphile1
Explorer
Explorer
We also have an LPG Onan, the fuel cost is so high that if cooling is needed we find a campsite with electric. The campsite typically isn't much more than eight hours of LPG fuel.

I'm curious how this works out for you. I really doubt the savings will be all that much since the generator fuel usage goes down when the load is cut.
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DrewE
Explorer II
Explorer II
Big Katuna wrote:
In Florida, you would wear out the starter.


Why would the starter wear out when the air conditioner (and thus generator) never cycle off? :B

MrWizard
Moderator
Moderator
just a thought
where is the Onan located, can you sleep with it running ?

we can,, other people can't

you have a quiet diesel up front ?

or is under your bedroom like ours
I can explain it to you.
But I Can Not understand it for you !

....

Connected using T-Mobile Home internet and Visible Phone service
1997 F53 Bounder 36s

2chiefsRus
Explorer
Explorer
We use an Auto Gen Start but do not use it to run the Air Conditioner in the way you are describing. If we have the Air Conditioner on, then we normally have the generator on too. The only exception was when we had pets and were staying at an unfamiliar campground. Then we would set the auto gen start and the AC to come on. The auto gen start was just a back up in case we lost power in the campground.
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markm
Explorer
Explorer
Not going to Florida, so I guess I wont wear out the starter.

Big_Katuna
Explorer II
Explorer II
In Florida, you would wear out the starter.
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