Re: sorta like a motor home instead of a sleeper cab
not sure why methanol instead of diesel fuel though. Diesel tanks would be physically smaller, and the engine more efficient. It's the nature of the fuel. Alcohols are already "partially oxidized" causing them to have less heat content.
The focus seemed to be more on the electric side, though, swapping out the entire battery assembly and things like that. In my view, a diesel generator would be separate but connected up MOSTLY to charge batteries while you're stopped (or maybe run while you drive for hill climbing). Maybe it's the kind of thinking that comes from having been on a submarine...
An advantage to not running the diesel generator continuously is that when an engine is operating at max power it's also operating at (or close to) max efficiency. This is especially true for diesel engines due to the way they work. In general they should pollute less in this configuration, and you would not have to run the thing inside a city (let's say) and just run on batteries within urban areas when you can. Then of course when you need the extra power to climb hills you'd have both batteries AND diesel engine to do that.
But mostly, it would charge batteries when you're stopped. I guess [un]loading counts for that, too.