Optimization of control methods in accordance with their intended use in power electronics applications is a necessity. In this manuscript, a hybrid control approach for DC -DC buck-boost converters consisting of a PI controller and a fuzzy logic controller is presented. The mathematical model has been proposed by determining the parameters of the DC -DC buck-boost converter. PI controller, fuzzy logic controller and hybrid controller are designed and simulated in MATLAB Simulink program. Genetic algorithm is used to select the most suitable PI parameters. Experimental tests are performed to show efficiency of the hybrid method for both buck and boost mode.