The incoming menace of global overheating and the exhaustion of fossil fuels, highlights the needing for alternative, renewable energy sources. In this context, the most interesting ideas appear to be related to solar, wind and wave power conversion. If on one hand solar and wind power extraction techniques are already well-established technologies, on the other hand the wave field is still setting its point, both in terms of used tools and of actual potential. The wave source offers a huge and untapped potential, thanks to its high superficial power density and its geographical spread. The state of art device to extract power from waves are called Wave Energy Converters (WECs).