[OrlyP]

I've seen installations that route LP in liquid form to a separate heated vaporizer before eventually plumbed for consumption in gas form. This is particularly useful in cold climates or where the application requires consistently high flow rates wherein the natural vaporization in the tank is not as efficient in low temperatures.

 

[OrlyP]

The propane connector to the generator is for tank pressure, you would have to bypass the first regulator, perhaps replacing it for another, and feeding the engine “regulator” directly.

I doubt that. The gen itself would only have the demand regulator built-in.

All the "What's in the box" entry for any of Duromax' tri-fuel models includes a hose with a propane regulator that connects to the LP tank.