Mono solar panels are generally thought of as a premium solar product. The main advantages of mono panels are higher efficiencies and sleeker aesthetics. To make solar cells for mono solar panels, silicon is formed into bars and cut into wafers. These types of panels are called “mono” to indicate that the silicon used is single-crystal silicon. Because the cell is composed of a single crystal, the electrons that generate a flow of electricity have more room to move. As a result, mono panels are more efficient than their poly counterparts.