Another approach was used by the LIMPET 500 (Land Installed Marine Power Energy Transformer) energy converter which was installed on the island of Islay by Wavegen Ltd. It was a shore-based unit and generated power when waves run up the beach, creating pressure inside an inclined oscillating water column. This in turn creates pneumatic power which drives the twin 250 kW generators. Islay LIMPET was opened in 2001 and was the world's first commercial scale wave-energy device. In March 2013 Voith Hydro decided to close down Wavegen choosing to concentrate on tidal power projects.