The world's largest solar vessel has left the United States.

En route to the United Nations Climate Change Conference in Southeast Mexico, the Turanor PlanetSolar was created by a Swiss engineer bent on demonstrating to the world the capacities of solar power, according to published accounts. As part of its global tour, the 100-foot-long and 50-foot-wide boat covered by 537 square meters of photovoltaic solar cells docked in Miami for a four-day visit.

Prior to Southern Florida, the ship was in Monte Carlo, from where it required 26 days to arrive in Miami. The solar cells generate more than 93 kilowatts of power, 20 of which are required by the boat's engine. It also is equipped with batteries that store unused energy for use during cloudy days and at night.

While in ports, the Turanor PlanetSolar serves as an educational lesson. Miami area schoolchildren and teachers visited the ship and observed its technology.

The crew is aiming to circle the globe in 80 days.