how are the trailers getting charged? there are a lot more trailers than tractors, and having enough charge capacity for trailers seems like a lot. There are a lot of trailers that are just a frame with wheels for a shipping container.
trailers have to sit at docks to get loaded and unloaded. they can charge then. meanwhile the truck can leave instantly. maybe a two part system of flatbed trailer with battery + cargo container sitting on top that?
