The energy comes from The whole

Control volume

From a few meters deep, the currents have less capacity to circumvent obstacles and often overcome them because they transport millions of tons of mass in a cohesive structure, an attribute guaranteed by the physical state of sea water and vertical pressure. 

Technology

Unlike tidal turbine models based on wind turbines, our technology is designed for the concept of the control volume spanning several kilometers, and which carries enormous amounts of energy resulting from disturbances in the gravitational grid of the Earth-Moon-Sun system and the rotation of the planet.