A quick follow-up on an old topic: remember the ferry between Sweden and Denmark which was changed from Diesel to battery power? I went over to see for myself today and got lucky: one of the two ferries which was scheduled to be converted is in use and was docking as I came to the harbour. The robot in its little glas cage is locking pretty awesome. Now, frankly I have no idea if the system now works as intended but the ferry came in gliding silently, no vibrations, no noise, no smoke - truly majestic.
Pics or it didn't happen?
Here you go: (sorry, robot is behind the ferry, didn't manage to get a shot of that in action).
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(You can actually see the batteries in the modified 40 foot containers on the top of the ferry)
Here is a quick clip from the Danish equivalent to NPR about the project. Sorry for the language...