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Old 12-30-2015, 01:56 PM   #1
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How much gas does an Onan 5500 use

How much gas does an Onan 5500 use when under a load of 2 AC units and basic lights and residential refrig? Hrs of use under these conditions? How long should a Magnum 2000 Inverter keep the residential refrig running without the generator?
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Old 12-30-2015, 02:17 PM   #2
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Per Onan

Average fuel consumption

Gas........
No Load/0.3 Gal-hr
Half Load/0.6 Gal-hr
Full Load/0.9 Gal-hr

How long can it run...........until it runs out of fuel or trips

Inverter running Residential Fridge........
Depends on batteries.....amp hour rating
Fridge compressor amp rating
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Old 01-07-2016, 03:35 PM   #3
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A residential refrigerator might use around 1.5kwh of energy per day. That's 125 amp-hrs at 12V, but once you figure in inverter efficiency it will use at least 150 amp-hrs a day. Take your battery bank capacity and divide by 300 amp-hrs to see how long you really could last.
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Old 01-08-2016, 05:24 PM   #4
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A residential refrigerator might use around 1.5kwh of energy per day. That's 125 amp-hrs at 12V, but once you figure in inverter efficiency it will use at least 150 amp-hrs a day. Take your battery bank capacity and divide by 300 amp-hrs to see how long you really could last.
Still trying to figure out how this effects the fuel usage on the generator.
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Old 01-08-2016, 05:48 PM   #5
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Still trying to figure out how this effects the fuel usage on the generator.
The OP posted a 2 part question relating to running the refrigerator on an inverter.
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Old 01-16-2016, 01:32 AM   #6
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Per Onan

Average fuel consumption

Gas........
No Load/0.3 Gal-hr
Half Load/0.6 Gal-hr
Full Load/0.9 Gal-hr

I figure that's about $20 to get a good night's sleep. Plus wear on the genny. Is it worth it? A little more and you can get a 30amp plugin for a full day.
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Old 01-16-2016, 08:35 AM   #7
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I figure that's about $20 to get a good night's sleep. Plus wear on the genny. Is it worth it? A little more and you can get a 30amp plugin for a full day.
With Passport America you can get a 30/50 AMP, water & sewer hook up for less at some campgrounds.
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Old 01-16-2016, 09:15 AM   #8
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I had a 5500 in my previous rig, that I used at 4 day events at race venues. It was usually 90-100 degrees and I would run 1 AC most of the time, using two for quick cool down in the afternoon. I ran the generator continuously for up to 96 hours, only shutting it down to check oil twice daily. Under these conditions, it averaged exactly 0.5 GPH. Repeated this multiple times over 3 years and the results were alway the same. Going by the manufacturers specs, I must have averaged just under 1/2 load over the course of 4 days.
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Old 01-16-2016, 04:34 PM   #9
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I figure that's about $20 to get a good night's sleep. Plus wear on the genny. Is it worth it? A little more and you can get a 30amp plugin for a full day.
For a little more $, if you drive off the main highways to find the cheap campgrounds. How much gas is used there.

I stop at supper time in a Flying J, just off the highway , gas up and go early in the morning.

A full day at a campground needs to be 2 days unless you like driving at night.
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Old 01-16-2016, 05:57 PM   #10
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Unless you are living in your coach full time and using the generator for power don't worry about "wear on the genny " They love to work. Must keep up the maintenance and you'll get thousands of hours out of them.

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I figure that's about $20 to get a good night's sleep. Plus wear on the genny. Is it worth it? A little more and you can get a 30amp plugin for a full day.
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