Global installed hydropower capacity by country at the end of 2015. The bulk of the world’s hydropower capacity is in China, a country that added 19.4 GW in 2015 alone. Of the 1,211 GW installed worldwide, about 145 GW is pumped storage capacity—the majority of which is currently installed in Japan. Planned projects will soon make China the world leader of pumped hydro capacity, however.
Courtesy: International Hydropower Association