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  1. #1
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    Managing LP fuel Onan 5.5kw generator

    Considering an Onan 5.5kw generator on the next trailer. It will run off LP. Main use would be for power when stopping overnight at rest areas or parking lots. Also, charging batteries during generator hours when camped at national parks.

    Relevant specs for the unit:
    wt. - 288 lbs
    LP usage:
    .4 gals/hr at idle/ no load
    .7 gals/hr at half load
    1.1 gals/hr at full load

    30 lb propane tank holds 7.5 gallons of propane.

    At idle, one tank would last 18.75 hrs
    Half load, one tank would last 10.7 hrs
    Full load, one tank would last 6.8 hrs

    For those who have this generator using LP as the fuel:
    How do you manage your generator usage for the LP available on the trailer?
    Do you carry extra 30 or 40 lb tanks in the truck?
    Carry extra tanks or a larger tank on the trailer?

  2. #2
    Long Hauler offtohavasu's Avatar
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    Are you looking at a Momentum?
    Curtis, Christine, Cole, and Charlotte

    2007 Chevrolet Silverado Duramax LBZ, CCLB
    2020 Momentum 351M

  3. #3
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    No on the Momentum. Solitude.

  4. #4
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    Managing LP fuel Onan 5.5kw generator

    Considering an Onan 5.5kw generator on the next trailer. It will run off LP. Main use would be for power when stopping overnight at rest areas or parking lots. Also, charging batteries during generator hours when camped at national parks. Not for extended use over 1-2 days.

    Relevant specs for the unit:
    wt. - 288 lbs
    LP usage:
    .4 gals/hr at idle/ no load
    .7 gals/hr at half load
    1.1 gals/hr at full load

    30 lb propane tank holds 7.5 gallons of propane.

    At idle, one tank would last 18.75 hrs
    Half load, one tank would last 10.7 hrs
    Full load, one tank would last 6.8 hrs

    For those who have this generator using LP as the fuel:
    How do you manage your generator usage for the LP available on the trailer?
    Do you carry extra 30 or 40 lb tanks in the truck?
    Carry extra tanks or a larger tank on the trailer?

  5. #5
    Site Sponsor Scousers's Avatar
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    we have the two 30 lb. tanks in the trailer and two secured in the bed of the truck.

    The two in the trailer have Mopeka sensors on them so I know when one gets low. Some places we camp are far from propane resupply.

    The propane generator seems to be a good choice, even though it is fairly thirsty.

  6. #6
    Long Hauler offtohavasu's Avatar
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    Just checking because you posted in momentum section and these models come with gas generators.
    Curtis, Christine, Cole, and Charlotte

    2007 Chevrolet Silverado Duramax LBZ, CCLB
    2020 Momentum 351M

  7. #7
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    Originally posted in Momentum, figuring Momentum owners would be most familiar with generator usage. Makes sense that these are gas, considering the fuel cell on the toy haulers. I will repost to Solitude section.

  8. #8
    Long Hauler Paul & Deb's Avatar
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    Well, I can't speak directly to the 5.5 but I installed a 3.6 LP unit in my trailer and it uses less propane than I expected. Still it uses more fuel than the gas equivalent, I wouldn't trade it for anything. I estimate just under 1 gallon an hour with the A/C and miscellaneous items running. I love it for those boondocking mornings when I just want to run the coffee maker or microwave for breakfast. We have also used it many times when we have had to overnight in a truck stop. For us the solar does all we need to keep our batteries charged and run our inverter for TV, etc., but even though it was more expensive than a portable unit, we were happy with our decision.
    Paul "Poppy" and Deb Cervone
    2022 Imagine XLS 22MLE
    2021 Imagine XLS 17MKE - SOLD ; 2015 Grand Design Reflection 337RLS - SOLD
    2016 GMC Denali 3500HD SRW Duramax/Allison CC 4x4; Tire Minder TPMS

  9. #9
    King Pin
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    Two threads were merged into this one. Please note that posting the same topic in two different sections of the forum is not allowed.

    Jim - moderator

  10. #10
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    Jim: Please explain about posting in two sections. I explained why I reposted the message from Momentum to Solitude section. Apparently, my post was more appropriate in the Solitude section.

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