Here’s why: You would need a whole other ship full of lithium batteries in tow so a useful size cargo ship would have the enormous energy required for a regula

Here’s why: You would need a whole other ship full of lithium batteries in tow so a useful size cargo ship would have the enormous energy required for a regular cargo trip. Trains work better, but charge time would impact operation feasibility, and just electrifying the railway with overhead cables is currently cheaper than lithium battery solutions. Hence the case for hydrogen fuel cells for train applications.