is paper presents a grid-connected PV system in a centralized con�guration constructed through a three-phase dual-stage inverter. For the DC-DC stage the three-phase series resonant converter is chosen thanks to the advantages that it exhibits. However, it is inadequate for the accomplishment of MPPT, due to its efficiency strongly depending on the implemented deadtime and switching frequency. en, this paper proposes a conceptual modi�cation, that is, a modi�ed dual-stage inverter in which the inverter stage is responsible for both the MPPT and the grid-current control. In addition, the DC-DC converter operates with constant duty cycle and frequency. Such con�guration requires a new concept, introduced as Behavior Matching. It serves as a fundamental feature for the DC-DC converter to reproduce the PV array I-V characteristic when they are connected, without control action. e maximum power operating point is found by maximizing the direct axis current, obtained by Park's transformation from the inverter, through the perturbation and observation algorithm. Any speci�c measurement to realize the MPPT is needed. e galvanic isolation is achieved by using a high-frequency transformer. e structure is appropriate for high power applications, above 10 kW.