Battery-powered delivery vans actually make a lot of sense. The operating cost is definitely lower for an EV van than an ICE van, and for most applications the van is parked at a terminal overnight and has hours of idle time for charging.
Electrifying a Class 8 tractor for over-the-road use is like transporting cargo from Asia to the U.S. in a canoe.
Except for, where do you get the electricity? It takes more power generation than legacy fuel to run a car, van or truck.
It doesn’t pencil out unless you build nuclear power.