Quick Answer
Dual-axis solar trackers provide a 20-30% increase in energy production during winter months compared to fixed tilt systems, due to their ability to adjust to changing solar angles and maximize energy capture.
Optimizing Energy Yield in Winter
In winter, the sun is lower in the sky, resulting in a more oblique path across the horizon. This makes it essential for solar panels to be adjusted to optimize energy production. Dual-axis solar trackers can tilt and rotate the panels to face the sun directly, maximizing the energy capture. By adjusting the angle of the panels to 10-20° from the horizontal, dual-axis trackers can increase energy production by up to 20-30% compared to fixed tilt systems. For example, in December, the optimal angle for solar panels in a region with a latitude of 40°N would be around 30-40°.
Winter Performance Comparison
A study conducted at a site with a latitude of 40°N demonstrated that a dual-axis solar tracker system produced 22.1% more energy than a fixed tilt system in December. In contrast, a single-axis tracker system produced only 6.4% more energy during the same month. The significant increase in energy production was attributed to the dual-axis tracker’s ability to adjust to the changing solar angles and track the sun’s movement more accurately.
System Design Considerations
When designing a dual-axis solar tracker system for winter operation, it’s essential to consider the system’s mechanical and electrical components. The system should be designed to withstand harsh winter conditions, including snow and ice loads. Additionally, the tracker’s control system should be able to accurately adjust the panel angle to optimize energy production during the winter months. By carefully designing the system, solar installers can ensure that dual-axis trackers provide optimal performance and energy yield during the winter months.
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