The energy of the tide is a result of the Earth’s rotation combined with the gravitational pull of the moon and sun. Together, they move the water in the world’s oceans back and forth.
By capturing the kinetic energy in this ebb and flow, the movement of water can be converted into a source of electricity. And that electricity is renewable: the forces of the sun, moon, and earth are not depleted by harnessing the flow of water.
Tidal power is also predictable. While wind and solar are also excellent sources of renewable electricity, they provide intermittent supply. By contrast, we can predict the movement of the tides today, tomorrow…and for the next 500 years to come.