There is no diesel used in the process, the power generated from the ship is from the three sources: wind, sun, and fuel cell. You can see the boat, unlike conventional boat, has no room for people to sit and chill on deck due to almost the whole top being covered by solar panels. The lithium batteries could have been the sole power source, but that would've made the shop weigh much more than the current 28 metric tons. The idea also is not to depend on batteries alone, which according to one of the or organisers, is not inexhaustible. The project is like a model to showcase the hydrogen economy, and kind of rekindle the interest into more sustainable means of hydrogen production and utilisation.