This note addresses the concept of wave energy conversion by means of piezoelectric material. The ocean surface waves represent an important source of energy power. A multiphyisics simulation is used to focus on different aspects, namely the free surface wave, the fluid-structure-interaction, the mechanical energy input to the piezoelectric material and finally the electric power output using an equivalent open circuit model. The authors designed several feasible devices which are all similar, as long as they are forced by the wave action at a characteristic wave frequency. For the sake of simplicity, a basic system is analysed here. The generic tool which is setup is useful for the design of piezoelectric polymer wave energy converter. The amount of energy generated by the analyzed piezoelectric device appears small, but the concept has interesting developments.