Now being readied 3.1 miles off the coast of Portugal, the first commercial wave farm will use the movement of the sea to generate 2.25 megawatts of electricity-enough to meet the
energy needs of more than 1,500 homes-from three 459-foot-long Pelamis Wave Energy Converters. Moored to the seafloor, each machine has four cylindrical pontoon-like segments. Passing waves will cause each machine to undulate like a giant sea snake.