World 's largest solar - powered boat cruises beneath Tower Bridge . More than 800 solar panels charge enormous lithium-ion batteries stowed in the catamaran 's twin hulls , which power two electric motors at the back . The Turanor Planet Solar features over 500 square meters of solar panels . First scientific expedition along America 's Gulf Stream . $ 100 million vessel to revolutionize nautical design , climate change research .
World 's largest solar - powered boat cruises beneath Tower Bridge . The Turanor Planet Solar features over 500 square meters of solar panels . First scientific expedition along America 's Gulf Stream . $ 100 million vessel to revolutionize nautical design , climate change research .