Dust reduces solar panel efficiency by 10% to 40%, depending on your climate, the type of dust, and how long it sits on the surface. In a typical environment, you can expect around a 20% drop in power output from dust buildup alone. That makes dust the second most significant factor affecting solar. Accumulation of dust on PV panels is a big challenge, especially in dry and semi-arid environments like Morocco, where the number of dust particles in the atmosphere diminishes the efficiency of solar panels severely. The review analyzes 30 recent studies, which provide insight into performance. Solar energy is emerging as a cornerstone of the global renewable energy transition, with projections indicating that photovoltaics (PV) could contribute up to 90% of electricity generation by 2050. With global PV capacity projected to reach 500 GW by the end of.