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07-27-2018, 08:38 PM
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#1
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Winnebago Camper
Join Date: Jun 2018
Posts: 11
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Fuel usage on gas generator
Ran my gas generator on my 2018 Sightseer for about 5 hours today. Any ideas on how mush gas it burns per hour? Did a great job with all the power I needed.
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07-27-2018, 10:35 PM
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#2
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Winnie-Wise
Join Date: Feb 2017
Location: Denver, CO
Posts: 351
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I think the 4K is like a half gallon per hour. I think I read that on the Cummin’s site. They said it’s cheaper than running the dash a/c when driving.
Got this from a dealer site:
Consumption at 1/2 load 0.3 GPH
Consumption at 3/4 load 0.5 GPH
Consumption at full load 0.7 GPH
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07-28-2018, 09:51 AM
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#3
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Winnie-Wise
Join Date: Oct 2013
Location: Altoona, Iowa
Posts: 419
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Quote:
Originally Posted by Scott and T
Ran my gas generator on my 2018 Sightseer for about 5 hours today. Any ideas on how mush gas it burns per hour? Did a great job with all the power I needed.
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Your Sightseer 36Z has a 5.5KW Cummins Onan generator. The specifications for that unit are:
No Load=0.35 gph
1/2 load= 0.60 gph
Full load=0.95 gph
The generator specs say that it puts out 45.8 amps. At best you probably used no more than one-half of that or less. So a guess, unless you monitored your usage for the 5 hours, is that you were running at 1/2 load or less and therefore used less than 0.60 gph.
__________________
2010 Itasca Sunova 33C (a lot of modifications)
2004 Jeep Rubicon, 34K miles (highly modified)
Three cats and the wife
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07-30-2018, 02:34 PM
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#4
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Winnebago Camper
Join Date: Jun 2018
Posts: 11
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Thanks guys!
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08-04-2018, 04:31 PM
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#5
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Winnebago Camper
Join Date: May 2013
Posts: 39
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Any info on altitude?
Quote:
Originally Posted by aauummm
Your Sightseer 36Z has a 5.5KW Cummins Onan generator. The specifications for that unit are:
No Load=0.35 gph
1/2 load= 0.60 gph
Full load=0.95 gph
The generator specs say that it puts out 45.8 amps. At best you probably used no more than one-half of that or less. So a guess, unless you monitored your usage for the 5 hours, is that you were running at 1/2 load or less and therefore used less than 0.60 gph.
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Do you know of any adjustments/offsets for altitude? Noticed mine shut down running both AC's in 105 temps going from 3000 feet to 7000 feet last month. I never determined if it overheated, altitude or both. Runs fine since and never happened before.
__________________
2011 Itasca Sunova 33C, 2001 Acura MDX, DW and her 2 Barbiedogs
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08-04-2018, 05:27 PM
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#6
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Winnie-Wise
Join Date: Oct 2013
Location: Altoona, Iowa
Posts: 419
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Quote:
Originally Posted by Rorytug
Do you know of any adjustments/offsets for altitude? Noticed mine shut down running both AC's in 105 temps going from 3000 feet to 7000 feet last month. I never determined if it overheated, altitude or both. Runs fine since and never happened before.
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Mine trips the circuit breakers on the generator in those conditions. I have to keep watch to make sure the AC's stay on and if they don't I have to stop and reset the circuit breakers on the generator. It's happened to us a number of times and it doesn't seem to effect the generator at all.
There is the small dial on the carburetor that can be adjusted for altitude but I think that that adjusts the fuel ratio and has little effect on the generator power output decrease because of altitude. Other than that I don't know of any adjustments that can be made for altitude.
__________________
2010 Itasca Sunova 33C (a lot of modifications)
2004 Jeep Rubicon, 34K miles (highly modified)
Three cats and the wife
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08-04-2018, 05:32 PM
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#7
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Winnebago Camper
Join Date: Oct 2010
Location: Oviedo, Florida
Posts: 17
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After hurricane Irma, we ran our generator for almost 72 hours straight. We were only down about 1/8 a tank when we finally shut down.
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08-04-2018, 05:53 PM
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#8
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Vietnam Veteran 1967-1970
Join Date: Apr 2018
Location: Watertown, WI. GO GBPACK
Posts: 91
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I have a 2019 Sightseer 33c, we stayed on Fort Bragg around June 12th for 5 days. 4 of the days we had brownouts caused by the extreme 95 feet+ deg. Heat. Yes it was in June. We ran our generator with 2 air conditioners for 5 hours a day. We put on 20-21 hours those 4 days. We filled up when we got on base and filled up when we left base. It was 7.8 gallons for 20-21 hours thats approximately 2.6 hours per gallon. IT WAS HOT! No trouble with circuit breakers either. We did Not also run the microwave while the air conditioners were engaged.
I hope this helps you. We did change the first oil change at 36 hours.
__________________
Ken Smith, 2022 Winnie Minnie 26T
Vietnam Veteran 1967-1970
Joshua 24:15
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08-04-2018, 06:02 PM
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#9
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Winnebago Master
Join Date: Nov 2011
Location: Full time RV'er
Posts: 1,174
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Quote:
Originally Posted by GBFANKEN
I have a 2019 Sightseer 33c, we stayed on Fort Bragg around June 12th for 5 days. 4 of the days we had brownouts caused by the extreme 95 feet+ deg. Heat. Yes it was in June. We ran our generator with 2 air conditioners for 5 hours a day. We put on 20-21 hours those 4 days. We filled up when we got on base and filled up when we left base. It was 7.8 gallons for 20-21 hours thats approximately 2.6 hours per gallon. IT WAS HOT! No trouble with circuit breakers either. We did Not also run the microwave while the air conditioners were engaged.
I hope this helps you. We did change the first oil change at 36 hours.
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Or put another way 0.38 gallons per hour. That's actually pretty good. What are the specs and brand of your genset?
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08-04-2018, 06:10 PM
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#10
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Vietnam Veteran 1967-1970
Join Date: Apr 2018
Location: Watertown, WI. GO GBPACK
Posts: 91
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I believe 5.5k (whatever the 2019 came with). I will have to go look for sure. We kept the RV in the shade as much as possible, we had mostly heat to deal with, not sun. We kept the RV @ 79-80 deg. We have Sun Magna Shields on all the windows, that really helps with the sunlight.
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Ken Smith, 2022 Winnie Minnie 26T
Vietnam Veteran 1967-1970
Joshua 24:15
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08-05-2018, 06:39 AM
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#11
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Registered User
Join Date: Aug 2018
Posts: 18
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Yesterday I gassed up my new-to-us 2004 Adventurer 33 (wow!) then ran the Gen for slightly more than 5 hours. Had a professional detailing-cleaning crew go over the interior (they vacuumed and steam-cleaned everything), wife was doing wife-things inside, AC was running non-stop. The dashboard gas gauge didn't move a millimeter.
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08-05-2018, 08:26 AM
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#12
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Winnebago Owner
Join Date: Apr 2014
Location: Texas
Posts: 107
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I've been following the debate over how much fuel the genset uses, especially related to MPG and fuel economy. Let me say up front, I DON'T CARE about the effect on MPG. Here's why - we nearly always travel at about 60-63 MPH. But let's assume we average 60 MPH. Even if our genset used 1 GPH (I suspect it's closer to the 0.6 GPH), at that consumption rate the effect on MPG calculates to 1/60 gal per mile (0.017 gallon). That seems to me too inconsequential to worry about, especially if running the AC keeps the DW happy when we're travelling down the road.
__________________
Butch and Peggy
N.Central TX; 2000 Itasca Suncruiser 32V;Workhorse P-32 Chassis; Chevy Vortec 454 L21 w/Banks Pwr Sys; Ultra-Power ECM; SteerSafe; Timbren Suspension kit rear; Onan Emerald 5K
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08-05-2018, 08:49 AM
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#13
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Winnebago Master
Join Date: Jun 2013
Location: Full-timer/volunteer w/SOWERS
Posts: 2,734
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Quote:
Originally Posted by Scott and T
Ran my gas generator on my 2018 Sightseer for about 5 hours today. Any ideas on how mush gas it burns per hour? Did a great job with all the power I needed.
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This spec sheet might answer most of your questions https://www.electricgeneratorsdirect...G5500_Spec.pdf
It looks like on Full Load you use about 0.9GPH.
__________________
Rick & Melissa Young & Dawson (RIP), 2011 Meridian 40U, FL XCL, ISL 380HP/DEF, Al 3000 MH, 2014 Honda CR-V, SMI AF1, Blue Ox TruCenter & tow equip.,EEZTire TPMS.
Servants On Wheels Ever Ready. Best job we ever paid to do . (full time volunteers)
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08-05-2018, 09:08 AM
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#14
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Winnebago Camper
Join Date: Feb 2014
Posts: 15
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Generator gas consumption
Most numbers look pretty good. I just assume 1 GPH of gas to be on the safe side as my gas gauge is a little off.
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