In the context of the increasing energy demand, renewable energy sources such as solar irradiation represent a much cheaper alternative for electrical energy production. The efficiency of solar energy conversion is influenced by photovoltaic cell performance and by power processing system. The power processing systems are designed to maximize the generated electrical power based on maximum power point tracking (MPPT) strategies. This paper proposes a particular, simple and reliable solution of the extremum control system based on a “Perturbation and Observation” approach. The proposed solution was implemented, tested and validated using Matlab/SIMULINK environment.