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Old 08-05-2022, 06:03 PM   #1
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how much can an Onan lp generator power?

About to park at a family residence for about a week and wondering how much our generator can do. We haven't actually used it since we brought our rv home. Had it running to try to cool the unit down while we moved in, but it stopped working after a few hours and never really got the temperature down. To be fair we lived in Florida and it was 100 degrees. Also we had an issue with the propane tanks not being installed correctly from the dealer. So assuming everything is working properly now, how much can we expect to power and for how long? Our goal is just to keep the inside cool enough to avoid everything getting musty or moldy while we're visiting. Can we run more than one ac and the refrigerator? Or will it cycle between the 3 ac units. Very new at this and still have a lot to learn. We'll be staying in the house while we're there so really just want to keep from doing damage to the rv and our belongings. Thanks for the help!

We have an Onan lp generator and a 2022 4001Lk for reference
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Old 08-05-2022, 08:39 PM   #2
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We have the Onan 5500 Propane gen in our unit. Have used it a few times to cool the unit when Boondocking overnite. It will run both of our 15K AC and fridge without a problem, BUT a 40 Lb propane tank will only last approx 10 Hrs when running both ACs.
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Old 08-05-2022, 10:44 PM   #3
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What size generator would help provide more pertinent answers?
Typically if was the built in unit it should at least power 2 A/Cs I'd think.
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Old 08-08-2022, 01:56 PM   #4
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My Onan 6500 will run the entire camper, but like stated already it is THIRSTY when on full power..
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Old 08-08-2022, 09:41 PM   #5
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I found the Onan 5500 fuel consumption a while back:
0% load 0.4 gallons/hour
50% load 0.8 gallons/hr
100% load 1.1 gallons/hr

A gallon of propane is about 4lbs so a 30lb tank has about 7.5 gallons in it.

So you can use this info to figure out how long your generator will run depending on fuel capacity and how much power it is generating.
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Old 08-08-2022, 11:44 PM   #6
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That's about right as we have the 40 Lb tanks which is approx 10 Gal of propane, thus approx 10 Hrs on a full tank under full load.
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