Futurology

Power to ports is the least of my worry - that is cheap to build compared to all the other costs.

Charging on diesel doesn't make sense though. It makes more sense to have a 'tug boat' with engines for those trips and then it can do something else (what?). Can an existing ship (either cruise or cargo) tow this across the ocean on need?

in the end though my question is can batteries large enough fit on a ship. Everything else is logistict we can figure out but batteries are not energy dense. Ships have a lot of space (and need ballest weight on the bottom), but is there enough?