This contribution presents a smart power electronics injection system for grid-connected photovoltaic energy resources. The developed converter can not only inject the maximum active power as a typical inverter does, but also provide the active functions the Smart Grid scenario needs, including reactive power reference tracking for compensating purposes, node voltage regulation for helping the grid when there are undervoltages or overvoltages, grid harmonic distortion elimination due to non-linear loads and active power reference tracking with the addition of an energy storage system, based on ultracapacitors, for managing the discontinuities of the photovoltaic energy. The topology is composed by an inverter that interfaces the photovoltaic array with the grid and a bidirectional DC-DC converter for the energy storage. The control system is based on d-q current control theory guided by a reference power point tracking method. Simulation test bench has been developed with the objective of testing the control system.