In traditional glass-backsheet solar panels, only the front side of the solar cell is exposed to sunlight, and therefore only one side of the cell is active in generating electricity. However, in double-glass solar panels, both sides of the solar cell are exposed to sunlight, allowing for the capture of light from multiple angles. This bifacial design enables double-glass solar panels to generate electricity not only from direct sunlight but also from reflected light that reaches the rear side of the panel.
“Passivated Emitter and Rear Contact” solar cells, known as PERC solar cells, are becoming more common today as an option for making solar panels. PERC solar cells are modified conventional cells that enable the cells to produce 6 to 12 percent more energy than conventional solar panels.