With a ‘hybrid’ car there is value in capturing energy during braking and using it for future propulsion. The worse at driving a person is the more helpful such technology is (e.g. people who don’t anticipate that they will have to stop at the red light ahead and slam on the brakes at the last minute rather than coast and slow down.)
What value is this on a ship which would stop using its drag or with engines in reverse?
Not my line of work, but methinks this is close to perpetual motion?
Here it is:
https://callofthesea.org/about-us/our-fleet/matthew-turner/regenerative-electric-propulsion/
And your tax dollars at work!
The dockside solar will be facilitated by the US Army Corps of Engineers at their Bay Model facility, which has recently been outfitted with a rooftop solar array that generates 540 kW/h
“What value is this on a ship which would stop using its drag or with engines in reverse?”
It was most likely LNG.
The are testing battery systems. Just a guess but they could charge while cruising at sea and thus reduce import emissions.