Giant flexible solar sails on shipping freighters powering the engines and catching wind could be an interesting and old school way of moving products. I think possibly direct airship shipping would be more interesting. Tens of thousands of slow moving solar powered airships moving freight without having to deal with multiple transportation solutions.

Pickup at factory, move across ocean on airship, deliver to customer. Much better than pickup at warehouse deliver to terminal, move to carrier, carrier moves it to terminal, load on ship, cross world, unload off ship, loads container onto train, train take container to yard, stores at yard, loaded onto truck, deliver to terminal.