Like many of the current crop of ‘cutting edge’ renewable energy technologies, the concept of extracting energy from waves and tides is not a new one. Indeed, it is well over 100 years since the first tidal wheel was built and the 240 MW La Rance tidal barrage project in Brittany, France, has been operating for well over 40 years. What has changed over the intervening years is the level of urgency with which such projects are now being addressed and the technical achievements by some manufacturers which are making tidal and wave energy a reality.

Alongside growing interest in the UK, USA, and Portugal, countries such as Canada, South Korea, Australia, New Zealand, Brazil, Chile, Mexico and other nations are also expressing support for ocean energy development.