Why are there no on board generators?

Hello everybody.

I’d like to know why nobody has ever decided to mount a on-board generator to use when battery power drops too low??

even if it uses gas, many would appreciate having the extra range, and it would probably be quite efficient cuz you’re not revving the engine up and down with a throttle, nor are you losing efficiency by shifting gears.

plus the chevy volt does either this or something similar.

why don’t we all add a on-board generator to our EV’s??? :mod:

The Chevy Volt does do this as does the planned Chryslers I suspect that home builders are trying to escape the use of gas altogether.