My Cummins will run 69 hours on 250 gallons of propane at full load, or 125 hours on same amount of propane at half load.  On a thousand gallons of propane it will run my genset about 10 days if I have calculated correctly.  You can only put 800 gallons in a 1000 gallon tank.  That is about $1600 to $2400 dollars based on current prices if I'm correct.  That is almost my annual bill for electricity, water and natural gas.  I have run my genset for two weeks X 2 and four weeks X 1 and I didn't see much difference in my MLGW bill.  I'm no expert on propane but I have always been told it is expensive to run a whole house generator on propane.  It doesn't matter because we can't have propane tanks in Memphis.  Plus, in the wide-spread outages we have here I'm wondering how hard or easy it would be to get delivery.

I'd go with the two Hondas for your shack Jussi.

Steve, N4JQQ

correction 3   250 gal tanks
Roger

On 12/1/2025 12:39 PM, Jussi Eloranta wrote:

Hi Roger,

Did you say that you have 3 x 20 gallon tanks? This is propane? I have 250 gallon propane tank that we occasionally use for heating. Perhaps I could hook up a generator to it as well.

I don't actually need power for the house - just the shack :-) So, a smaller generator would probably do.

Jussi (aa6kj)

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