This study investigated experimentally the performance due to automatic cooling and surface cleaning
of Photovoltaic (PV) module installed on the roof of a building in hot arid area as compared with that
of a module without cooling and cleaning. The module cooling is controlled automatically according to
the rear side temperature via rejection of none-converted solar-energy to the ambient to keep the PV
module surface temperature always close to the ambient temperature. In addition, this system controls
the cleaning period of the module front surface. The results showed a decrease of about 45.5% and 39% in
module temperature at front and rear faces, respectively. Consequently, the cooled and surface cleaned
module has an efficiency of 11.7% against 9% for the module without cooling and cleaning. Moreover, the
maximum output power produced by cooled and cleaned module is 89.4Wagainst 68.4Wfor non-cooled
and non-cleaned module.