Reduction of Soiling on Photovoltaic Modules by a Tracker System with Downward-Facing Standby State

Figure 6

Changes in the calculated normalized photocurrent of the PVs using PMMA and glass surfaces on the downward and upward systems during exposure of (a) nonconcentrating Si PV and (b) CPV using InGaP/InGaAs/Ge triple-junction solar cell.

(a)

(b)