“In 2010, the Tûranor PlanetSolar, a 35 metre long, 26 metre wide catamaran yacht powered by 537 square metres of solar panels, was unveiled. On May 4, 2012 it completed a 60,023 kilometres (37,297 mi) circumnavigation of the Earth in Monaco after 585 days and visiting 28 different countries, without using any fossil fuel. It is so far the largest solar-powered boat ever built.”
HISTORY OF ELECTRIC BOATS
"Most of water vessels are powered by diesel engines, with sail power and gasoline engines also remaining very popular, boats powered by electricity have been used for over 120 years. Electric boats were very popular from the 1880s until the 1920s, when the internal combustion engine took over Since the energy crises of the 1970s, interest in this quiet and potentially renewable marine energy source has been on the rise, especially as solar cells became available, for the first time making possible motorboats with an infinite range like sailboats. The first practical solar boat was probably constructed in 1975 in England."