It is possible! That is the good news. Fully solar powered, all you hear is a whisper from the electrical engine. This is great. It looks really relaxed, sailing around without the noise of the traditional noisy engine.
Solar powered inflatable boat
But as you can see, they needed to cover the full length of the boat to be able to install enough solar panels. For a work boat like a pond, this is no problem. There are no passengers who would like to sunbathe, it is all about efficiency. But that is different for pleasure yachts. I don’t think wife number 3 would be very amused if she can’t lay in the sun all day anymore, or when the kids can’t play on the deck because it is covered with solar panels.