The term; "TRUCKMOUNT" and what that really applies to has always been used in a generic sense, IMHO.
What I specifically mean by this is that TRUCKMOUNT equipment comes in all sizes and shapes, and power, performance, AND means of power supply ----(GASOLINE or ELECTRIC or Hy-Brid--gas/electric combination)
It has always been interesting, AND somewhat hypecritial whenever board debates come down to the fact that --all--truckmounts are better; and all "electrics"--those machines that have wheel and are called; "Portables" , just can't measure up.
Yet, a few so called "Portables" (Yep, they still have 4-wheels, like the van its mounted in) are so powerful that they can also be run at 200 feet; use propane heat to heat that water to levels where the operator can not even hold onto the wand (I think that's hot enough?!).
Bottom line: "T H E R I G H T" high-performance machine that can be run from the van (either electric or gasoline powered) can and will do a very, very good job,---with the right operator----- period. Otherwise, we all would be required to purchase that $100,000 machine and drive semi-trucks through local neighborhoods.
Ones success is not based on how BIG his machine is; rather how BIG his reputation is or becomes, and the profits he takes home at the end of the day.
Good Fortune to all;