Abstract: An off-shore platform is provided with a power grid comprised of a plurality of depending float members which are buoyant and weighted sufficiently to rise vertically in response to the buoyant energy of the wave action and to fall in response to gravity. A reciprocating piston member disposed in a cylinder is operatively connected to each float member to compress a fluid on the up stroke as the float member rises on a wave, and to extract fluid from a reservoir on the down stroke as the float member falls after the wave passes. The exhaust ports of the cylinders are commonly connected to accumulate fluid pressure in an exhaust reservoir sufficient to drive a turbine which powers an electric generator. The intake ports of the cylinders are commonly connected to an intake reservoir whereby the fluid extracted therefrom drives a second turbine and electric generator. The generating equipment disposed atop the platform sends the electricity to shore through subsea power lines.