Soiling losses of for a given PV array are determined by the most soiled cell / panel in a series connected string. The WASPP II (Waterless, Automated, Soiling Pattern, Pod) utilizes cell-level /sub-panel level soiling measurements to determine accurate characterization of non-uniform soiling losses.
WASPP II - PV Soil Monitoring System
Sub-panel Soiling Detection
The WASPP II is designed to measure soiling losses at the cell / sub-panel level to provide additional reliability, accuracy and insight into soiling losses across the PV plant.