What are Most Effective Mounting Angles for Bifacial Panels?

Choosing the Right Angle

When selecting the mounting angle for bifacial panels, it’s essential to consider the optimal angle for energy absorption. Research has shown that angles between 20° and 30° offer the best balance between energy yield and structural stability. A study conducted by the National Renewable Energy Laboratory (NREL) found that a mounting angle of 25° resulted in the highest energy yield from bifacial panels.

Factors Affecting Energy Yield

Several factors can influence the energy yield of bifacial panels, including the angle of incidence, albedo (reflectivity of the surrounding surface), and the distance from the panel to the reflective surface. To maximize energy yield, it’s crucial to minimize the distance between the panel and the reflective surface, ensuring that a significant amount of light is reflected back onto the panel. A general rule of thumb is to maintain a distance of 2-5 meters between the panel and the reflective surface.

Considerations for Tracking Systems

For tracking systems, which follow the sun’s movement throughout the day, the optimal angle may vary depending on the panel’s orientation and the system’s design. In such cases, it’s essential to consider the system’s tracking mechanism and adjust the mounting angle accordingly. For example, a tracking system with a vertical axis may require a different mounting angle than one with a horizontal axis. A mounting angle of 25°, as mentioned earlier, can serve as a starting point for tracking systems, but adjustments may be necessary to optimize energy yield.