EPDM Coatings
RV LED Bulbs offer Sponsored by Spotless Water Systems rvupgradestore.com Composet Products EVDO

Author Topic: How much gas does a generator use?  (Read 15064 times)

ceemike

  • ---
  • Posts: 558
How much gas does a generator use?
« on: July 14, 2010, 06:39:45 PM »
Does anyone know how much gas a generator uses per hour?  I have an Onan 5.5kw & I would be running one or two roof air units.
Mike & Judy Wagner
From the Keystone State
FMCA F418448
2004 Winnebago Brave 32V, W20 Chassis
2004 Honda CRV
2004 Honda Reflex

jjkz24

  • ---
  • Posts: 29
Re: How much gas does a generator use?
« Reply #1 on: July 14, 2010, 07:03:32 PM »
That's kind of a broad question for that generator.  Are you using propane, diesel, or gas?  Using 2 A/C units will be using considerably more fuel than one, but I'm sure you already know that.  It also depends on what other electrical items you'll be running, and what load the generator will be running at.

DiGiacomo

  • ---
  • Posts: 414
Re: How much gas does a generator use?
« Reply #2 on: July 14, 2010, 07:11:13 PM »
i think my onan 6.5 book says 0.6 gal per hour.......as minimum.......this could be one AC??
Don & Joanne
86 bounder 454 gas
american car dolly

ceemike

  • ---
  • Posts: 558
Re: How much gas does a generator use?
« Reply #3 on: July 14, 2010, 07:18:50 PM »
It runs on gasoline & the only other appliance running would be the refrigerator.  I don't think it draws much current.  I'd like to get an idea because I plan to run the generator so I can use the front rooftop air unit while I'm driving.  I said I'd be using both because I figured that would be the worst case scenario.  I read somewhere that a typical 5kw gas generator uses about 1 gallon of fuel per hour.  That seems a little high to me.
Mike & Judy Wagner
From the Keystone State
FMCA F418448
2004 Winnebago Brave 32V, W20 Chassis
2004 Honda CRV
2004 Honda Reflex

Bob Buchanan

  • ---
  • Posts: 3043
    • RV Space Manager reservation SW <c>
Re: How much gas does a generator use?
« Reply #4 on: July 14, 2010, 08:26:45 PM »
Does anyone know how much gas a generator uses per hour?  I have an Onan 5.5kw & I would be running one or two roof air units.

I run it mostly in the winter while dry camping - so the air is not involved. However, I do run everything in my office including a 3 station network that includes a desktop with quite a few peripherals. Whenever the genset is running, I am also charging my batteries with a 40A three stage charger, and most always will have cable news in the background w/no sound.

My gas usage runs around .6gal/hr with a 5.5Onan. Prior to this rig I had a Class C with the same usage and an Onan 4k micro lite genset -- and also got .6g/hr.
« Last Edit: July 14, 2010, 08:31:16 PM by Bob Buchanan »
Bob (fulltimer - Rocklin, CA residency)
Current Location
My Photo Album
Business Website

Bob Buchanan

  • ---
  • Posts: 3043
    • RV Space Manager reservation SW <c>
Re: How much gas does a generator use?
« Reply #5 on: July 14, 2010, 08:37:36 PM »
Looks like I somehow double posted -- sorry about that.  ;)
« Last Edit: July 14, 2010, 08:39:36 PM by Bob Buchanan »
Bob (fulltimer - Rocklin, CA residency)
Current Location
My Photo Album
Business Website

Wendy

  • Forum Staff
  • ---
  • *
  • Posts: 12185
Re: How much gas does a generator use?
« Reply #6 on: July 14, 2010, 08:39:33 PM »
We use 1/3 to 1/2 gallon per hour but we seldom run the A/C (we prefer staying away from place that need A/C) and we leave the fridge on propane so it's mostly the electronic gizmos running.
 
Wendyd
Wendy, Mike, and Gordon
~We can't be lost because we don't care where we're going~
Here's where we are http://map.datastormusers.com/user2.cfm?user=2276
2004 Winnebago Sightseer
1973 Sunshine Yellow VW Bug

Gary RV Roamer

  • Forum Staff
  • ---
  • *
  • Posts: 42773
  • We're on the road again...
Re: How much gas does a generator use?
« Reply #7 on: July 14, 2010, 09:37:47 PM »
Onan says your genset would use about 0.6 gal/hour at 50% load, meaning when producing a constant 2,750 watts (23 amps).  That's about what two a/c's would draw if running continuously.  One a/c is obviously less, about half that.  The fridge would be insignificant - maybe another 2 amp (240 watts) on average.

Your converter/charger also draws some power, but not much there either.
Gary
--------------
Gary Brinck
2004 American Tradition
2007 GMC Acadia
Homebase: Ocala National Forest, FL

Orick

  • ---
  • Posts: 1023
  • Went Full Time to Half Time but Still Fun Time
Re: How much gas does a generator use?
« Reply #8 on: July 19, 2010, 05:47:24 PM »
FWIW I think the manual for my Onan 8000 Diesel says 1gph but I almost never use it so can't verify actuals.
Rick, Nancy, Peanut, Lola (Westies) & Bailey the Sheltie Dog
2007 Itasca Ellipse 40FD
Ford Explorer Toad

ArdraF

  • ---
  • Posts: 7218
Re: How much gas does a generator use?
« Reply #9 on: July 19, 2010, 09:10:57 PM »
Our Onan 10kw diesel generator uses about .5-.6 gallon per hour.  Can't caculate exactly but that's close.  We run it frequently when driving because it's hot most of the places we go and we need the A/C to keep it relatively comfortable inside.  In January we spend a week boondocking at Quartzsite and diesel usage is negligible.  In addition to the diesel engine, diesel is used for the generator and our Aqua Hot water and heating system.

ArdraF
ArdraF
:D :D