Check the conversion of the energy content to usable energy. More of the Wh of the batteries become motive force than the Wh of the bunker fuel. Your conclusion

Check the conversion of the energy content to usable energy. More of the Wh of the batteries become motive force than the Wh of the bunker fuel. Your conclusion isn't wrong; the density of the energy storage (be it bunker fuel as chemical energy storage, or batteries as chemical energy storage) matters.