An expanse of blue solar panels stretches across part of the Yamakura Dam reservoir in Japan's Chiba Prefecture. In two years, if construction goes as planned, 50,904 panels will float atop the reservoir, generating an estimated 16,170 megawatt hours annually, enough electricity to power almost 5,000 homes, according to Kyosera the company building the solar plants
http://www.nytimes.com/2016/05/24/science/solar-power-floating-on-water.html?_r=1
http://www.nytimes.com/2016/05/24/science/solar-power-floating-on-water.html?_r=1