[i_am_proteus]

Yes, this is true. Realistically, a "charging station" for a ship this size would have a large pierside structure to transform/regulate, and a very large cable array that would probably be moved to the ship via a crane. The connectors would almost certainly require manual fitup and the operation would require several personnel.

(Similarly, refueling a ship is substantially more complicated than refueling an automobile.)

Maritime engineers and workers can get this job done.