Minesto's fully operational Dragon 12 looks like some sort of futuristic military drone – but it behaves remarkably like a kite underwater. It uses lift generated by tidal flows to fly patterns faster than the currents, harvesting renewable energy.
A 28-ton, 1.2 MW tidal kite is now exporting power to the grid::undefined
1.2 MW so (thinks in Satisfactory) sixteen coal turbines or eight fuel generators.