Is dual-axis tracking significantly better than fixed mounts?

Advantages of Dual-Axis Tracking

Dual-axis tracking systems offer superior performance compared to fixed mounts by adjusting the angle of the solar panels to follow the sun’s movement throughout the day. This adjustment enables the panels to capture more sunlight, especially during peak hours when the sun is high in the sky. By using the optimal angle, dual-axis trackers can increase the annual energy production of a solar panel system by 25-40%.

Technical Details of Dual-Axis Tracking

Dual-axis trackers consist of two axes, one for azimuth (north-south movement) and one for altitude (up-down movement). The tracker’s motor and gearbox enable smooth and precise movement, ensuring the panels are always facing the sun. The optimal tilt angle for most locations is between 30-40 degrees, with the azimuth angle depending on the solar panel’s orientation. A good rule of thumb is to set the tracker to an angle that matches the latitude of the installation site.

Real-World Benefits and Considerations

While dual-axis tracking offers superior performance, it comes at a higher upfront cost compared to fixed mounts. However, the increased energy production can lead to faster payback periods and higher return on investment. Additionally, dual-axis trackers can be more complex to install and maintain, requiring specialized knowledge and equipment. Nevertheless, they are ideal for large-scale solar farms and commercial installations where maximum energy production is critical.