Quick Answer
Dual-axis trackers offer significant efficiency gains, typically ranging from 20-40% more energy production than fixed tilt systems, making them a worthwhile investment for sites with high solar irradiance and minimal shading.
Efficiency Gains from Dual-Axis Trackers
Dual-axis trackers are a type of solar tracking mount designed to maximize energy production by adjusting the angle and orientation of the solar panels throughout the day. By tracking the sun’s movement, these systems can capture more sunlight, resulting in increased energy output.
How Dual-Axis Trackers Work
Dual-axis trackers use two axes to move the solar panels: one for azimuth (east-west movement) and one for altitude (north-south movement). This allows the panels to track the sun’s movement from sunrise to sunset, even during the winter months when the sun is lower in the sky. For example, a typical dual-axis tracker system may rotate the panels 360° in azimuth and 90° in altitude to optimize energy production.
Cost-Benefit Analysis
The cost of a dual-axis tracker system is generally higher than a fixed tilt system, but the increased energy production can lead to a shorter payback period. For instance, a 1 MW solar farm with a dual-axis tracker system may produce 20-40% more energy than a fixed tilt system, resulting in an additional 200,000-400,000 kWh of annual energy production. This increased energy output can offset the higher upfront costs of the dual-axis tracker system, making it a worthwhile investment for sites with high solar irradiance and minimal shading.
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