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Old 07-20-2016, 11:13 PM   #1
1 Rivet Member
martinez , California
Join Date: Jul 2015
Posts: 15
Run time for tri fuel honda eu2000i or yamaha ef2000i

Hello, so i just purchased my first airstream, 2007 28ft safari. Im very excited!

So trying to figure out boon docking solutions. looking at getting two parallel tri fuel generators so we can run ac and power while boon docking. either Honda or Yamaha 2000 units

How many hours can we run basic electric off the standard LP tank 30lbs?

How long does it take to fully charge the airstream lead batteries with the generator on LP?

How many hourd can we run AC off the standard LP tanks 30lbs?

Thanks in advance!

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Old 07-21-2016, 09:46 AM   #2
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2015 28' Flying Cloud
Newtown , Pennsylvania
Join Date: Jan 2015
Posts: 97
These generators generally run at rated load about 4 hours on a gallon of gasoline. I would figure about 3 hours per gallon of propane. A 30 pound propane tank holds about 7 gallons. that would be about 21 hours at rated load. It all depends on your load requirements, but it's a start.


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Old 07-21-2016, 10:39 AM   #3
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martinez , California
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Posts: 15
Thanks Bruce!

hoping to find some real world experience and average figures with these kind these generators and set up.
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Old 08-10-2016, 03:50 PM   #4
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Tenafly , New Jersey
Join Date: Dec 2015
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For these calculations, this is the test setup. I bought a tri-fuel conversion kit for my Honda eu2000i. I have two Hondas, a new companion and my original one which is 4 years old now. I bought the tri-fuel kit from central maine diesel for 279 bucks. The kit installed pretty easily using a youtube video from engineer775 to guide me along.
Back to the numbers. I have a backup power setup using 6 x 216Ah 6V Golfcart batteries with a xantrex pro sine SW 2000W inverter and an IOTA DLS-55/IQ4 12 VOLT 55 AMP 4 STAGE AUTOMATIC SMART BATTERY CHARGER / POWER SUPPLY charger. I use #00 wiring for everything. For this test, I pulled 4kw out of my battery setup from fully charged. I measured this using a kill-a-watt meter. I pulled the 4KW using my gas powered furnace and a desktop PC attached to the xantrex inverter. The gas powered furnace draws about 5A to run its fan when the heating system is engaged. The computer draws about 2A continuously and simulates the draw from my hurricane essential items (fridges, some lights, chargers for phones). I pulled the 4kw over a 13.5 hour period. I’d no issues at all with the Xantrex and would recommend it.
The voltage on the batteries after the 4kw was 11.83V under load with the furnace and the desktop running. This was drawing about 5.2A at the time. I removed the load and after allowing the batteries to rest, the voltage was 12.07V. I measured both these voltages at the “battery”.
I used propane to recharge the batteries using my Honda eu2000i.
I attached a full propane tank (36.1lbs gross weight) to my Honda and let it charge the batteries using the IOTA 55A charger. The charger drew 10.1A during the bulk stage. Thats about 860W. I started charging at 12:45pm. The bulk charge finished around 5 hours later. At that point, it had drew 4.4kw from the Honda (measured by the kill-a-watt). The voltage at the battery was 14.06V and in the absorption phase, the draw had dropped to 8 amps.
I stopped it there. I weighed the propane cylinder and it was now 31.7lbs. So, drawing 4.4kw from the Honda took 4.4lbs of propane. Thats 1kw/lb of propane. The math turned out too easy but those are the numbers.
Efficiency wise, this isn't great but I think given we're converting from propane to electricity rather then using it directly then it is what it is. 1lb of propane is about 21600BTUs. 1kwh is 3412BTU. So, our efficiency is 3412/21600 or 15.7%. The eu2000i is regarded as a pretty efficient generator so it's interesting that even with the Honda, the answer seems to be 15.7%.
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Old 08-10-2016, 04:17 PM   #5

2003 25' Classic
Zanadude Nebula , WNY
Join Date: Jun 2007
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Our 2000i runs approx 8.5hr on one gallon gas in eco mode.

It will run 18+ hrs on it's 2.6gal pancake tank, also in eco mode.

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AF #1

"Sticks & stones can break your bones...and hail will dent your Airstream"

So when is this..."old enough to know better" supposed to kick in?
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Old 08-10-2016, 04:32 PM   #6
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1976 Argosy 26
Henderson , Kentucky
Join Date: Jul 2016
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Popular Mechanics Sept 2019 has article on generators says Honda EB2000i has run time of 9.6 hours and did not mention Yamaha. Likes was GFCI protection.
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Old 08-11-2016, 06:24 PM   #7
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2015 28' Flying Cloud
Newtown , Pennsylvania
Join Date: Jan 2015
Posts: 97
Originally Posted by Ky76Argosy View Post
Popular Mechanics Sept 2019 has article on generators says Honda EB2000i has run time of 9.6 hours and did not mention Yamaha. Likes was GFCI protection.
Sept 2019. Did they happen to mention who the President of the US was?

50 amp, Awning package
2015 Ram 2500 6.7 TD, Blue Ox 1000 lb.
4 Lifeline AGM, Trimetric 2020
PD9160 converter, Prosine 1800 inverter
2x eu2000i Propane
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