this post was submitted on 09 Sep 2023
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The vast majority of ships can be powered from shore, they're doing it all the time in wharfs. Ports actually having the infrastructure is another issue, especially when they're small and the ships large, but IIRC the EU is requiring things to be implemented by 2030.
And it's not exactly trivial: Powering a canal/river barge with a couple of electrical systems is no biggie, that's basically connecting up a house or even just camper, but ocean-going container ships need a couple of megawatts peak power, cruise ships over ten.