It takes more energy to disassociate water into hydrogen & oxygen , so you'll be always be running at net loss.
My view of new technologies is that first you make it work then you figure how to make it cost effective. If you can't then it's on to the next.
Sinot issued a statement saying that he has "no business relationship" with Bill Gates. It added that the concept yacht, called Aqua, was "not linked" to either him or any of his representatives. You can find the statement on the Sinot website (on the left): https://sinot.com/2020/02/11/9071/
I think in light of the statement that Martina referenced the title of this thread should be changed. This industry is generally very quiet about who owns what boats. Shouldn't we also not incorrectly name owners?