PV Modules Sand and Brush Abrasion Testing

For the qualification and benchmarking of PV modules for hot desert operation, a test sequence for sandstorm and cleaning durability testing is introduced. A test sequence based on sand and brush abrasion testing of IEC 62788-7-3 is under evaluation using blowing sand testing, sand trickling testing, and a cleaning robot test-stand. The change in short-circuit current of PV modules, roughness, transmittance and reflectance of glass surfaces and samples are measured. Coaxial microscopy is used to describe the abrasion process of the front glass texture and the anti-reflective coating.