Remember zapping ants with a magnifying glass?

I've wondered why someone doesn't design a true EV, then just plop in an Onan generator with a battery charger and a fuel tank. This would solve the problem, as the genset could run on gasoline, diesel, or even LP gas, and it wouldn't require that much extreme automotive engineering. Best of all worlds, EV range, and if one needs to go on a longer trip, the genset fires up and keeps the batteries topped off.