The solar facade consists of 1,096 pieces of semi-transparent CdTe thin-film solar glass, each sized 1,200mm x 600mm x 6.8mm, covering a total area of 0.72 square meters. The unique feature of this glass lies in the thin black lines embedded within the double-layer glass interlayer, visible only within a distance of less than two meters. Beyond that distance, only the color of the entire panel is visible. (CdTe thin-film solar panels are available in red, blue, orange, and green.)