This paper presents a harvesting vibrational energy with piezoelectric ceramics using a single phase Sheppard-Taylor converter. In this study, the renewable energy is obtained by the piezoelectric ceramics and the converter regulates the power flow to the desired load. The control of the Sheppard-Taylor converter satisfies optimal working points using vibration-powered piezoelectric generators as a source. The circuit describes the generator's power dependence and helps the definition of the load behavior for power optimization. The performance of the energy harvesting circuit is investigated by Matlab/Simulink program and laboratory conditions. Experimental results show that the converter controlled by a very low consumption circuit effectively maximizes the power flow into a 12 V. The rechargeable Lithium-ion battery charger connected to the converter output. The converter's efficiency is above 80% for input voltages between 0.5 and 12.8 Vrms, and for output powers between 1.2 mW and 25 W. The presented circuit and control strategy can be used as well for power optimization of piezoelectric energy harvesting devices. © 2012 Praise Worthy Prize S.r.l. - All rights reserved.