How long will Alp 1000W generator run on 20lb tank?

[Tripping4x4]

I just saw an article on this generator on this site. Never heard of this brand, would any of you know how long a 20lb propane tank would last with it?

 

[Vance Hogg]

60 hours on eco mode is what they claim. I bought one a few months ago and while I've never kept mine running on eco mode only, I've never gotten 60 hours from a single tank. It does last very long though. Good little generator. Don't forget to change your oil and if you get one, there is NO oil in it when it's shipped.

 

[GrubWorm]

What sort of load can be run on one of these in eco mode?

 

[GrubWorm]

Let me reword what I’m after, at what watts does this thing automatically shift from eco to high?

 

[Foxtrot Whiskey]

What sort of run time with AC or heater plugged into it?