I mean, technically you could swap out the entire cab every time it needed to be charged. The goal is to get the trailer to the destination, not the cab. Ther

I mean, technically you could swap out the entire cab every time it needed to be charged. The goal is to get the trailer to the destination, not the cab. There are several problems with that, you end up with a lot more idle equipment than just the battery pack, you've got to either be constantly switching drivers or drivers have to be constantly switching cabs, you need facilities to swap trailers and charge cabs, etc etc etc. But tractor trailers already have a convenient modularity built in, is all I'm saying.