According to the IEA GIEC has been researching shoreline, concrete
OWC systems since 1985. Their first device was rated at 1kW and
was followed by a 20 kW system. In 2001 a 100 kW demonstration
plant was deployed in the Guangdong Province and was grid
connected for 2 years. GIEC also developed 5 kW floating, offshore
OWC called a backward bent duck buoy.