As conventional energy sources near to be fully consumed soon, the interest in generating electricity from renewable energy sources increases rapidly especially from photo voltaic “PV" systems. To connect AC loads to a PV system, an inverter should be used to convert the DC output coming from the PV system to AC matching the load requirements. Modified sine wave “MSW" inverter is the most used type because of its low cost. The problem of using MSW inverter is that the load type affects the inverter performance. The object of this paper is to study the effect of different loads on the MSW inverter output waveforms. Throughout the present work, a simulation model for the PV system is built using MATLAB/SIMULINK. An experimental setup is implemented for verifying the simulation analysis. A comparison between the theoretical and experimental results confirms the validity of the simulation.