Tidal energy is a hydro-powered renewable source of energy that utilises the large amounts of energy available within the oceans tides to generate electricity. 

 

As tides are predictable and regular unlike the wind or the sun, the tidal power is more efficient than any other renewable source. This allows miles of coastline to be used for tidal energy exploitation and the larger the tidal influence, the greater the movement of the tidal water and therefore the more potential energy that can be harvested for power generation.