Challenges of Installing Bifacial Panels on Sloped Ground?

Mounting and Angle Considerations

When installing bifacial panels on sloped ground, it’s essential to consider the optimal angle for maximum energy production. Bifacial panels perform best when the rear side is exposed to a bright sky, which can be challenging on sloped sites. To mitigate this, installers can use specialized mounting systems, such as the “tracker” type, which allows for dynamic adjustments to optimize the angle and orientation of the panels throughout the day. A 20-30 degree angle is typically optimal for bifacial panels, but this can vary depending on the site’s specific conditions.

Structural Integrity and Snow Load

Bifacial panels are more prone to snow accumulation and weight due to their larger size and increased surface area. This can put additional stress on the mounting structure, which must be designed to handle the increased weight and wind loads. Installers should use structural calculations to determine the required mounting strength and anchor points to ensure the system can withstand local snow loads, which can range from 20-40 pounds per square foot (0.98-1.96 kPa) in various regions.

Shading and Ground Obstruction

Sloped ground installations are also more susceptible to shading and ground obstruction issues, which can reduce the panel’s energy output. Installers should conduct thorough site assessments to identify potential shading sources, such as trees or buildings, and design the system to mitigate these effects. Using software tools like PVWatts or Helioscope can help model the site’s energy production and identify areas for improvement.