You'll see a lot of power cats that are doing this or attempting to do this.
PassageMaker also did an article on a Beneteaus hybrid power 34 Swift Trawler. If I remember correctly, in addition to short jaunts on just electric, the concept with the hybrid relates to diesel engines having an ideal peak efficiency load and RPMs. When the diesel is running, it is always running at it's peak efficiency. It then turns on and off as needed. When on, it is charging the battery bank. When that is full enough, it kicks off.
Of course, wind power could be considered the ultimate form of solar energy, and it has been successfully tested and used for thousands of years. You would just have to become a sailor.