A 300kW version of AW-Energy’s near-shore wave-energy converter has been running off northwest Portugal since 2012.

The key hydraulic stage of the part-scale machine’s power take-off, which is fed by three 100kW devices, has shown “excellent performance” in a wide range of wave conditions, churning out around 500kWh a day.

DNV GL reported that the machine, grid-connected via a substation at Peniche, generated “even in very mild conditions” of two-metre swells and “continued to operate as predicted even during more turbulent periods” with waves approaching ten metres in height.

“DNV