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China launches world’s largest electric container ship with 50 MWh battery

https://thedriven.io/2024/05/01/china-launches-worlds-largest-electric-container-ship-with-50-mwh-battery/

China Ocean Shipping Group launches world’s largest electric container ship, with a 50 MWh battery.

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You took the worst possible path to calculate all of this. Just compare energy to energy, that's the whole point of Watts.

COASTER1921

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True but efficiency is not the same and not as simple to compare since we don't know how much of the ship's battery is converted into motion. Similarly we don't directly know it's mass. ICE cars can use ~20% of the energy in fuel while EVs 90%+ of the energy in a battery. But now much can that ship effectively use? I have no idea how efficient boats are or aren't, hence the roundabout method above.