A boat that fuels itself is setting off around the world from Paris on a six-year journey that its designers hope will serve as a model for emissions-free energy networks of the future.

Energy Observer will use its solar panels, wind turbines and a hydrogen fuel cell system to power its trip. The $5.25 million boat heads off Saturday from Paris toward the Atlantic.

The futuristic-looking 100-foot boat will rely on sun or wind during the day and tap into its hydrogen reservoirs at night. It produces its own hydrogen through electrolysis of sea water.

Originally designed in 1983, the boat enjoyed a successful career in open-sea sailing races before skippers Frederic Dahirel and Victorien Erussard and a French research institute converted it into the Energy Observer project.