Batteries are already being applied on smaller passenger focused routes. It has become mundane enough to not even make headlines anymore. For example the amper

Batteries are already being applied on smaller passenger focused routes. It has become mundane enough to not even make headlines anymore. For example the ampere was ordered in 2011 https://en.m.wikipedia.org/wiki/MV_Ampere https://en.m.wikipedia.org/wiki/MV_Ampere Here's a ferry making locals news (use Google translate) which can operate for 3/4 of the day using batteries and has hybrid propulsion to optimally manage the level of charge. So no need for charging at each turnaround. https://www.sjofartstidningen.se/goteborgs-nya-elfarja-dopt/ https://www.sjofartstidningen.se/goteborgs-nya-elfarja-dopt/ Here's a conversion from diesel to electric for a larger ferry on a short route. https://en.m.wikipedia.org/wiki/MF_Tycho_Brahe https://en.m.wikipedia.org/wiki/MF_Tycho_Brahe As the systems become more efficient and batteries drop in price more maritime use cases will be enabled. It's simply all about how long between each time you can charge, and which speed you operate at.