The oceans is the world's largest solar energy collector and energy storage system. On an average day, 60 million square kilometers (23 million square miles) of tropical seas absorb an amount of solar radiation equal in heat content to about 250 billion barrels of oil. If less than one-tenth of one percent of this stored solar energy could be converted into electric power, it would supply more than 20 times the total amount of electricity consumed in the United States on any given day. 

There is a wide ocean zone and about 6,500 islands in China. The coast line is about 32,000 km in total, in which the mainland coast line is about 18,000 km. It possesses plenty of ocean energy resources. At a rough estimate, the potential storage of all kind of ocean energy resources is 4 -5 x 10⁵MW, in which the  tidal energy resources is more than 2 x 10⁵MW. 

Tidal Energy, Ocean Current, Wave Energy, Thermal Energy, Salinity Grad. Energy