In this work, an electrolyze system is considered to produce Hydrogen (H2) using photovoltaic (PV) panels. The system was experimentally installed and tested under the weather conditions of Cairo. Many PV modules with different specifications of current and voltage were tested for individual loads. One of PV modules that have the maximum current
with minimum voltage can produce the highest amount of Hydrogen. In addition, the parameters of (KOH) concentration in water and the apart-distance between the electrodes were studied. The apart-distance of 5 cm between the electrodes was found as optimized distance that produces more H2 quantity. Moreover, a H2-cell of 20×15×13 cm3 has higher H2
production than the size of 6×6×24 cm3, 24×6×24 cm3 and 24×24×24 cm3 cells. It is obtained that the optimal system that considers the above efficient conditions must have a PV module with high current and small voltage.