My 1,400 pound electric car draws 4,000 to 6,000 watts while going 35mph down a flat road and 22,000 watts for a few seconds while starting from a dead stop, unless you over size your generator to the point that it uses more gas then you could imagine then you are going to need a decent size battery pack that can handle the possible 40,000+ watt draw you are going to need in a truck to get moving from a dead stop.