Pendulor is a moving body type Wave Power Converter. It can do an efficient power conversion though; its survivability hasn’t been enough in the stormy sea operation. The authors invented a new Pendulor which can treat the shock load safely by different way during the storm. The new Pendulor uses a hybrid piston pump as a component of the HST (Hydro-Static Transmission) for the conversion. This study is a case of 50kW Pendulor for Sri Lanka Coastal use. Since the cause of the trouble, begins from action of the restrictor which keeps the Pendulum stroke within a limit at the emergency. It is a stopper of huge moving mass. The new idea of exchanging the pump from a reciprocal type to a rotary type one, it also suggested a new technology. By the hint, we invented the hybrid piston pump. After that, the Pendulor is able to get the free stroke motion with the simpler system of the pendulum. The system also brought the sockless conversion toward the stormy condition. It can not only contribute to make the pump to be greater survival, but also save cost of the electricity produced.