WaveRoller is a wave energy converter (WEC) developed by Finish company AW-Energy Oy since 2002, although the initial concept was developed between 1993 and 1999.
The device is a submerged hinged flap, or oscillating wave surge converter (OWSC) type. This uses the inshore then offshore surging motion of waves near the coast to rotate the hinged flap, or paddle, to generate electricity or to pump water onshore for desalination.
Two devices have been tested off Peniche, Portugal, in 2012 and between 2019 and 2021. In September 2024, the ONDEP project was announced which will deploy and operate an array of four WaveRoller devices in the same location.