In this paper, an experimental power quality analysis in presence of single phase grid connected PV
systems is performed in a PV system installed at the Department of Electric Engineering of the University of
Palermo through a measurement system set up by the Authors. In particular the analysis has been carried out
focusing the attention on voltage and current distortion, as the solar radiation varies. The corresponding Total
Harmonic Distortions in voltage and current terms are reported and compared with the standards limits. The presence
of interharmonic components is also discussed