The present study was designed to determine the effect of using heat pipe in PV/T systems. The sets of experimen-tations were carried out in spring and also early summer. During the tests both PV panels were placed next to each other facing south at the same level. Empirically, 30 was found to be the optimum angle at which PV panel receive the most radiation at the altitude of experimental site in spring. While regarding the performance limitations of the thermosyphons 40 was chosen during summer experi-mentations. The following conclusions can be drawn out from the study