Yachts don't rely on solar. Sometimes they have solar but only as a small auxilary system. They primarily rely on propeller regen where the prop flips into dr

Yachts don't rely on solar. Sometimes they have solar but only as a small auxilary system. They primarily rely on propeller regen where the prop flips into drag mode stealing a fraction of a knot from the sail-driven ship. I've seen some yacht owners try to install a small wind turbine but it's not worth the trouble because of the noise it creates. They also tend to have at least one gas generator as an emergency backup.