But you look at the inefficiencies involved in that setup, and you'd be better off not even having a generator feeding into the batteries. Just have a dual-engine vehicle. One gasoline, one running electric motors off battery. Run the battery until it is dead, then run the gas. Or whichever is more readily available. Running a gas generator to then convert to battry power- uh uh. Figure the gasoline engine runs what, 15-25% efficient? The rest is heat. The generator runs 90%? The battery>to electric motor>torque at the wheel is 85-90%? So figure .15x.9x9= ~12% efficiency of your fuel. Stick with the straight gasoline to torque conversion. Or even disregard the inefficiency of the gas motor, since it's common to both design (although a bigger gasoline engine is slightly more efficient). Just figure your generator conversion to electricity is probably less than 90% at charging your battery, and from the battery storage back to the wheels, it's not 100% either. Either way, you lose a great deal along the way.