Thor Forums

[Chance]

Below is fuel consumption data from generator manufacturers that may be of interest for RV applications. I rounded off to 2 significant digits since most of the information given is no more accurate than that — like size of fuel tank.

To make it easier to compare different sizes to each other, I’m expressing data in gallons of fuel per energy produced, or gallons per kilowatt-hour. And yes, I know a gallon of Diesel has more energy than a gallon of gasoline, but we buy both by the gallon, and store in fuel tanks and containers measured in gallons.

Note that Onan data are listed at 100% and 50% generator load, whereas inverter generators are typically listed at 100% and 25% of rated capacity.

Onan Generators:

2800 Watt RV Gasoline

.14 gallons / kWh at 100%

.21 gallons / kWh at 50%


4000 Watt RV Gasoline

.18 gallons / kWh at 100%

.25 gallons / kWh at 50%


3200 Watt RV Diesel

.12 gallons / kWh at 100%

.19 gallons / kWh at 50%


6000 Watt RV Inverter Diesel

.12 gallons / kWh at 100%

.13 gallons / kWh at 50%



Honda Inverter Generators:

900/1000 Watt Portable

.21 gallons / kWh at 100%

.38 gallons / kWh at 25%


1800/2200 Watt Portable (New)

.16 gallons / kWh at 100%

.26 gallons / kWh at 25%


2500/2800 Watt Portable

.16 gallons / kWh at 100%

.28 gallons / kWh at 25%


2800/3000 Watt Portable

.17 gallons / kWh at 100%

.24 gallons / kWh at 25%



Champion Inverter Generators:

2800/3100 Watt Portable

?? gallons / kWh at 100%

.29 gallons / kWh at 25%


3100/3400 Watt Portable

?? gallons / kWh at 100%

.28 gallons / kWh at 25%