onan 4K Generator run for a full tank?

Your owners manual will have a table of fuel consumption at various loads. Is a good guesstimate. Most generators are very fuel efficient especially at lower load ranges.

Matt_Colie wrote:

thehippie wrote:
How long does the Cummins onan 4K Generator run for a full tank?

We need to know what load you have on it a model would help too.
I have four each ~4kW capable Onans and they are radically different as they vary in age from 45 to a very young 20 years.

Matt

As well as what size your tank is...

thehippie wrote:
How long does the Cummins onan 4K Generator run for a full tank?

We need to know what load you have on it a model would help too.
I have four each ~4kW capable Onans and they are radically different as they vary in age from 45 to a very young 20 years.

Matt

The GPH rate depends on load. Running the air or a few heaters & the fuel disappears. Be thrifty with your power management & you might be better off enlarging the battery bank, getting an inverter to run things like the TV & phone chargers & only run the genny as necessary to recharge or air if needed.

Gasoline
Half load .5 g/h.
Full load .7 g/h.

LPG
Half load .6 g/h
Full load .7 g/h

Around half a gallon per hour. On my class C with a 55 gallon tank, that should be around 80 hours from full tank to the 1/4 tank cut off.

What is the capacity of the fuel tank?

“it will depend on the load, you have on it” Even if you run it downhill?

it will depend on the load, you have on it.