The main reason we don't use batteries for ships is energy density of batteries and as a consequence the range of the ship. "The vessel is equipped with 10 con

The main reason we don't use batteries for ships is energy density of batteries and as a consequence the range of the ship. "The vessel is equipped with 10 container-shaped power units with a total power supply capacity of about 19,600 kilowatt-hours." https://global.chinadaily.com.cn/a/202604/16/WS69e0ee90a310d6866eb43dd4.html https://global.chinadaily.com.cn/a/202604/16/WS69e0ee90a310d... 19600 kWh of stored energy is about equivalent to 7 ton of diesel when burnt in diesel engine with 25% thermal efficiency "Fuel consumption by a containership is mostly a function of ship size and cruising speed, which follows an exponential function above 14 knots. For instance, while a containership of around 8,000 TEU would consume about 225 tons of bunker fuel per day at 24 knots. At 21 knots, this consumption drops to about 150 tons per day, a 33% decline." https://transportgeography.org/contents/chapter4/transportation-and-energy/fuel-consumption-containerships/ https://transportgeography.org/contents/chapter4/transportat...