For anyone else wondering, TEU is effectively the number of cargo containers it can carry.
<a href="https://en.wikipedia.org/wiki/Twenty-foot_equivalent_unit" rel="nofollow noreferrer">https://en.wikipedia.org/wiki/Twenty-foot_equivalent_unit</a>
“Battery in a shipping container” systems today can supply somewhere between 1-4 Megawatt hours of energy. If the ship has two 900kW motors, then you get about 30 minutes to two hours of propulsion per container at ahead flank and under ideal conditions.<p>I suspect these ships stop fairly frequently, maybe once every few hours or once a day? I read once that containers can be loaded/unloaded at a rate of about one per minute, so “refueling”, so to speak, becomes a 5 minute to one hour job, depending how much energy is needed. I wonder how competitive that is with current ships of similar size.<p>The economics become better as energy density of the containers improves, for sure, though.