It seemed like a good idea at the time and maybe it still is. But something as big as a Lightning would have to have a large gas tank to go along with that range extender. Having to stop every 100 or so miles for gas doesn't buy you very much. Providing you can even safely do it, using next year's limited bed space for gas wouldn't leave much room for hauling. I guess the question for people contemplating long trips in their Lightnings is how much of the time they would want to haul things in the truck's bed.The BMW i3 may be ordered with a 264 pound range extender which is simply a two cylinder gas engine with a small fuel tank that functions as a generator to extend your range. However, it is not big enough to power the car, so it only extends the range by about 80 miles.
Agreed that it’ll likely be 3rd parties who release them.At one time it was hinted one might be forthcoming.