Development of new energy resources has become an important object. The proposed of separating hydrogen form water for utilization as a substitute for oil and other fossil fules has become a field of interest for energy planners and decisions makers. The present work is concerned with studying and analyzsng a photovoltaic (Poly-Si manufactured by Solarex co) solar hydrogen system installed over the roof the institute of Astronomty and Genphysics at Helwan. Egypt. Fig (1): The system is constructed to measure the temperature of solar cell at center of the panel and near its edges. Using two thermocouples as sensors. The ambient air temperature was measured simultaneously with that of solar cells for comparison. The normal incident beam of global solar radiation is recorded by a doom sensor, which was installed in a parallel position.
Also, measurements of the environmental and meteorological effects are performed every half hour, electrical parameters, were carried out before the noon lime to sunset with variance in the solar radiation. The power output of solar cells. The amount of energy contained in sunlight just outside the earth's atmosphere is about 1.4km/m2. In actual use, solar cells convert between 5 and 20%of incident solar energy into electric energy. depending upon the specific solar cell construction and prevailing operating conditions.