Although ... most truck drivers these days are nuts, so I might be a little worried about putting this kind of power in their control. About 3-4 decades ago, truck drivers were the best drivers on the road, and the most courteous. Now they're the worst.
Of course, the NEXT step is that these will be driverless trucks and will just automatically move cargo. So you won't have to worry about drivers needing to sleep. You could have one of these running for as long as it'll hold a charge. Speaking of which, does it say how many hours it can run on a full charge?