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09-16-2020, 03:01 PM
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#1
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Junior Member
Join Date: Jun 2011
Posts: 7
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Propane Generators
This is a general question on using propane in generators. Who knows more about generators than RVers, right? Can anyone tell me the cons of using an exclusively propane generator? My new one is Duel Fuel, but considering all the clogged carbs I’ve had in the past, I’m going to use only propane on my new one. What is the downside other than dragging propane tanks along with them?
Anything to watch out for? Thanks in advance
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09-16-2020, 03:15 PM
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#2
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Senior Member
Join Date: Dec 2019
Location: camping somewhere.
Posts: 172
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My old Beaver had a propane genny.
It uses a bit more fuel than gas but burns way cleaner than gas. I had a 43 gallon tank on the Beaver and never ran out dry camping.
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09-16-2020, 03:27 PM
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#3
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Senior Member
Join Date: Nov 2015
Posts: 26,843
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Propane is only 10% less BTU then gasoline
BASIC FACTORS
It requires 2 horsepower to produce 1000 watts of energy per hour
Under load, each horsepower consumes 10,000 BTU per hour
Propane contains 92,000 BTU per gallon
Propane weighs 4.2 pounds per gallon
RUN TIME
How long would a 5000 Watt Generator with a 10 HP engine at 50% load run on a 20# propane cylinder?
10hp at 50% load would be using 5 horse power to generate 2500 watts of energy.
5hp x 10,000 btu would consume 50,000 btu per hour.
Using a 20# cylinder that produces 441,600 total btu, the engine consuming 50,000 btu per hour would run for about 8.8 hours.
Only issue would be if 2 LP Regulators were needed (common set up)
1 to supply enough flow to RV appliance demands
1 to supply generator flow demands
__________________
I took my Medication today. HAVE YOU?
Dodge 3500 w/Tractor Motor
US NAVY---USS Decatur DDG-31
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09-16-2020, 03:30 PM
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#4
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Senior Member
Join Date: Jun 2017
Posts: 2,807
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1 - Less power capability
2 - Fuel density - compare runtime of a 20 lb propane bottle vs a 5 gallon gas can. At the same load the gas can will run the generator at least twice as long.
So for a dual-fuel; continuously run it on gas, then shift it to propane for intermittent use.
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09-16-2020, 03:38 PM
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#5
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Senior Member
Join Date: Nov 2015
Posts: 26,843
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1 gallon of propane = 91,600 BTU
1 gallon of reg gasoline = 114,100 BTU
22,500 BTU difference OR roughly 1 pound of propane
__________________
I took my Medication today. HAVE YOU?
Dodge 3500 w/Tractor Motor
US NAVY---USS Decatur DDG-31
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09-16-2020, 06:16 PM
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#6
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Junior Member
Join Date: Jun 2011
Posts: 7
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No gasoline
Thanks for the replies. I know about the power differential, but I also know about bad gas, and clogged carbs. I’m using this new genny with only propane, unless something happens to prevent it. Gas is nasty, smelly, dangerous and doesn’t last. This gen runs super smooth right out of the box on propane. Any gas gen engine sputters for minutes or longer, and surges unpredictably, most of the time.
So far the only negative seems to be lugging propane bottles around with it. That won’t be a problem as this one is not for my RV, but for home backup.
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09-16-2020, 06:22 PM
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#7
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Senior Member
Join Date: May 2017
Location: Vancouver Wash
Posts: 7,227
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Some of us know how to drain the gas out of the carb bowl....
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09-16-2020, 06:29 PM
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#8
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Senior Member
Join Date: Mar 2016
Location: Arizona
Posts: 1,134
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I assume the OP is referring to a dual fuel portable generator, not a chassis mount.
A little less power, but often larger tank capacity than the built in Gas tank
Cleaner burning
LP ages well versus gas
No ethanol side effects
__________________
2016 Fleetwood Bounder 33C. Towing 2017 Jeep Wrangler Unlimited.
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09-16-2020, 06:33 PM
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#9
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Senior Member
Join Date: Nov 2011
Location: Full time RV'er
Posts: 5,146
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Propane is also the only known fuel that gains BTUs if it's warmed up. So throwing a heating blanket over the tank is a method to get more out of the gas. So that's cool.
I also had a 5500 watt propane generator with it's own tank and used it a lot over 12 years. Did have a few problems...
1) Bearing ball broke and seized it up. Yikes, $632 repair.
2) Control board open circuited because of corrosion on a terminal. Fixed myself.
3) Had to burnish the slip rings a couple times during regular maintenance.
4) Voltage regulator failed. Installed new, and the new one failed a year later. Doh!
5) Had a tech remove the carb to check for fracking. Nothing found. Clean as a whistle.
Might not relate, but my blog article has some info on the things that I had to do to my propane generator. I liked it a lot: Genset...
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09-16-2020, 07:09 PM
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#10
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Senior Member
Join Date: Nov 2015
Posts: 26,843
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Quote:
Originally Posted by Jim_HiTek
Propane is also the only known fuel that gains BTUs if it's warmed up. So throwing a heating blanket over the tank is a method to get more out of the gas. So that's cool.
I also had a 5500 watt propane generator with it's own tank and used it a lot over 12 years. Did have a few problems...
1) Bearing ball broke and seized it up. Yikes, $632 repair.
2) Control board open circuited because of corrosion on a terminal. Fixed myself.
3) Had to burnish the slip rings a couple times during regular maintenance.
4) Voltage regulator failed. Installed new, and the new one failed a year later. Doh!
5) Had a tech remove the carb to check for fracking. Nothing found. Clean as a whistle.
Might not relate, but my blog article has some info on the things that I had to do to my propane generator. I liked it a lot: Genset...
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Just curious.......transparency
IS your blog a 'click bait' site?
I try to avoid those types of links
__________________
I took my Medication today. HAVE YOU?
Dodge 3500 w/Tractor Motor
US NAVY---USS Decatur DDG-31
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09-16-2020, 07:09 PM
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#11
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Senior Member
Join Date: Sep 2013
Location: Pacific Northwest and Arizona
Posts: 2,050
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The generator in my Safari is propane and the only two drawbacks are - slightly less efficient, especially in cold temps, and I can't refill at any gas station in any town. The positive over gas is just what you are talking about, just start it up and it runs. Doesn't matter if it sat a week, or 6 months. I have read that there can be a problem with the odorizer gooping up the regulator but I really doubt it's nearly as common as bad gas plugging a carb, and I stopped having that problem on my lawn mower, chainsaw, trimmer, etc, when I started using gas stabilizer before storage.
I still start and run my unit monthly, but other than oil changes, I have't done anything to it and it starts every time. I find that even the oil doesn't get as dirty between changes.
__________________
Tom and Pris M. along with Buddy the 18 year old Siamese cat
1998 Safari Serengeti 3706, 300HP Cat 3126 Allison 3060, 900 watts of Solar.
Dragging four telescopes around the US in search of dark skies.
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09-16-2020, 07:26 PM
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#12
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Senior Member
Winnebago Owners Club Workhorse Chassis Owner
Join Date: May 2016
Location: Kamloops, BC, 60 miles from the Center of the Universe according to the Rinpoche, of the SF monks.
Posts: 7,395
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Quote:
Originally Posted by bob caldwell
Some of us know how to drain the gas out of the carb bowl....
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Yes, draining the carb is the ticket.
I have a gas stand-by genset that I haven't needed for more than 5 times in 15 years or so. I swap out the gas in the tank every Spring with new gas and stabilizer. Run the unit for maybe a half hour or so under load, then drain the carb and put it back into my shop.
It starts up and purrs away every Spring. Ready for whenever I need it.
Propane would be fine also, but I like the all-in-one set-up.
Happy Glamping.
__________________
Happy Glamping, Norman & Elna. 2008 Winnebago Adventurer 38J, W24, dozens of small thirsty ponies. Retired after 40 years wrenching on trucks! 2010 Ford Ranger toad with bicycles or KLR 650 in the back. Easy to spot an RVer, they always walk around with a screwdriver or wrench in one hand!
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09-16-2020, 07:56 PM
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#13
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Senior Member
Join Date: Nov 2011
Location: Full time RV'er
Posts: 5,146
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Quote:
Originally Posted by Old-Biscuit
Just curious.......transparency
IS your blog a 'click bait' site?
I try to avoid those types of links
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No ads at all. No links either except those that I find interesting or that are germane to the subject of the article.
Wait a sec...Old-Biscuit...you've seen me post hundreds of times about my blog over the last 14 or so years, and you've never visited? Come on dude, HA!
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09-16-2020, 08:59 PM
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#14
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Senior Member
Join Date: Nov 2015
Posts: 26,843
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Quote:
Originally Posted by Jim_HiTek
No ads at all. No links either except those that I find interesting or that are germane to the subject of the article.
Wait a sec...Old-Biscuit...you've seen me post hundreds of times about my blog over the last 14 or so years, and you've never visited? Come on dude, HA!
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I rarely click on any links posted...unless I have asked for specific info and link is provided.
Sorry but blogs are not my cup of tea
__________________
I took my Medication today. HAVE YOU?
Dodge 3500 w/Tractor Motor
US NAVY---USS Decatur DDG-31
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