Outdoor measurements of monocrystallin solar cells after years fielded

The main objective of the present work is focused on performance evaluation of monocrystalline silicon solar cells installed under desert environmental conditions. The study was carried out at research unit of renewable energy in Algerian Saharan middle (urerms.cder.dz), Adrar, in the extreme south of Algeria. Performance evaluation usually based on I-V curves and outdoor measurements. The tested panels have been exposed to long-term outdoor conditions for a period of 11 years in Algerian Sahara region, where the panels were often subjected to extraordinary stresses; high temperatures (can exceeds 50 C° in summer), high illumination (exceeds 1000 w/m
²
). Afterward, they have been tested for evaluating their long-term reliability. Obtained results prove the performance degradation of the tested panels compared to the results obtained in the literature. Experimental analysis revealed some defects, such as, increase in the cell series resistance and physical material defects.