305 Express generator?

I have a 4kw Panda on my 330. I get 35-38 hours on 12 gals. It all depends upon the load. Either way that's pretty good.
 
I have the same set up. I too have heard between 35-40hrs, though have not tested it that long yet.
 
Love the boat! Seems to suit all of our needs, although I too have not gottin her bloody yet. Seems like the weekends I'm available lately to fish the weather has been terrible. The cobia are running pretty good localy now, so looking forward to breaking her in here in a couple weeks. Only complaint I have are the stanless steel compartment latches that take that special little skeleton key to lock and unlock seem to lock themselves while under way. Think it might be from vibration. You would think GW would have a better system in place of them. Have you noticed this to be true on your 305. I've replaced just about everyone of them, and they still seem to do the same thing.