2.5 billion kW h/yr [21].
In the United States, the Monitor, a hybrid system designed by Demi-Tek that combines tide, wave and wind power, has been working just off Asbury Park, New Jersey since August 1990. The Monitor produces enough electricity to light the city's boardwalk and convention hall. In addition, the Monitor was deployed to help reduce wave action and protect beaches from erosion. It is anchored to the ocean floor by cables similar to those used for offshore oil drilling, and electricity is brought to shore by an undersea cable [22].