Trailers really wouldn't be the ideal place for a battery since they're often dropped off at a site. And that would also take up space in the trailer, adding we

Trailers really wouldn't be the ideal place for a battery since they're often dropped off at a site. And that would also take up space in the trailer, adding weight as well. Two batteries would make the entire deal heavy and expensive, and the idea of Tesla owning them wouldn't fly with most shipping companies. Lots of containers are used in intermodal transportation, and that would rely on 100% Tesla Semis everywhere they were used.