This study investigates the impact of sand erosion on photovoltaic (PV) module reliability in desert environments, addressing the limitations of existing acceleration models. We designed and built a novel accelerated aging testbed, subjecting modules from two manufacturers (DINEL and VISEL) to controlled sandblasting simulations. We developed a new acceleration model that includes wind speed and sand density, coupled with a fuzzy logic-based data analysis program. This approach enabled the estimation of reliability parameters and the prediction of module lifespan under natural operating conditions in the Adrar region of Algeria. Our findings reveal a significant difference in durability, with VISEL modules demonstrate significantly greater sand erosion resistance and durability than DINEL modules, with projected lifespans of 46.8 and 31.6 years, and annual degradation rates of 0.64 % and 1.38 %, respectively. considering only sand erosion as a degradation factor. This research provides a validated model for predicting PV module lifespan in desert environments, emphasizing the importance of material selection and design considerations for enhanced durability. The developed acceleration model and findings contribute valuable knowledge for deploying robust and long-lasting solar energy systems in arid and semi-arid regions.