With photovoltaic solar panels electricity is generated,
and it is used for producing hydrogen gas. Compressed
hydrogen gas is stored in tanks and used later to
generate electricity with a fuel cell.
And even more:
The Duffy Voyager
a custom solar-hydrogen racing boat on track to break
all ocean going speed and distance records.
The system will produce hydrogen on board, as needed,
creating no emmissions.
that wouldn’t really work, as if you had cables that are so long, you’d need very high voltage, and likely even alternating current, to get any of that electricity to the other side, besides that you might have sharks attacking the cables, as they are electro-sensitive.
Much better off producing and storing hydrogen on the boat, there are ways of compressing it passively, for instance by using it to pump barrels of water upward and such.