The aSi-PVs used in this project are Transparent Solar Glass PS-C Amber 95W BIPV Panel (facade) and Black Opaque Cladding PV PS-D 135W Solar Panel (roof).
Some of the solar light can pass through the PS-C Amber panels. Figure 2 below shows the transmission spectrum for the PS-C Amber panels (Orange trace) in comparison with the total solar light reaching the ground (Black trace) and the transmission spectrum of clean glass (Blue trace).
This picture demonstrates that UV, Blue and Green light are almost completely absorbed by the aSi-PV solar panel whereas Yellow and Red can pass through. This gives to the transmitted light a characteristic orange tint as shown in the figure 3 below.