The efficiency of the photovoltaic panels is affected by many environmental parameters, which have a negative impact on system efficiency cost of energy, dust and increased panel temperatures being the most serious. This work presents the results of a case study conducted at The British University in Egypt at El-Sherouk city to study the effect of different parameters such as dust accumulation, water cooling and coating on their performance of both mono- and poly-crystalline panels at El-Sherouk City. The effects of high temperature and dust accumulation on different solar panels placed in natural outdoor conditions at El-Sherouk City were studied and the electrical performance of dusted, cleaned, and cooled PV panels is presented. The variation in the efficiency of mono-crystalline panels installed at different tilt angles, resulting from the accumulation of dust on their surface, was also studied. This work was conducted by three of final year BUE mechanical engineering students, under the supervision of the Centre for Renewable Energy. The research was funded through the center’s funding resources provided by the university to the research centers.