Electric and solar power beyond inland boats

Can electric and solar-powered boats expand from inland waterways to seagoing work?

They suit ferries, coastal logistics, and low-power autonomous sensors better than oceanic cargo ships because batteries store far less energy than fuel and useful solar area is limited.

Battery propulsion fits vessels that return frequently to charging infrastructure. Ferries and coastal delivery craft could recharge while loading and unloading, whereas an Atlantic crossing would demand much greater stored energy. Small autonomous craft moving slowly as passive sonar platforms impose less demanding propulsion requirements. Solar panels can also support auxiliary electrical loads, illustrated by a sailboat using them for a kettle and refrigerator. Available panel area depends on the vessel's work: a passenger ferry can use roof space, while a top-loaded cargo ship needs its working deck clear. Mission, charging opportunities, and usable deck area determine which uses are practical.