Quick Answer
Dual-axis trackers can cost 1.5 to 2.5 times more than single-axis trackers, primarily due to increased complexity and the need for more precise alignment and movement mechanisms.
Comparison of Installation Costs
The primary difference between dual-axis and single-axis trackers lies in their installation costs. Single-axis trackers typically follow the sun’s east-west movement, while dual-axis trackers track both east-west and north-south movement. This added functionality requires more complex mechanisms, which contribute to the increased installation costs.
Dual-axis trackers can cost anywhere from $15 to $30 per watt, whereas single-axis trackers typically cost between $8 and $20 per watt. For example, a 5 kW solar array with a dual-axis tracker could cost around $75,000 to $150,000, whereas the same array with a single-axis tracker would cost between $40,000 and $100,000.
Installation Techniques and Challenges
Installing dual-axis trackers requires more precision and expertise, as the trackers need to be aligned with the solar array and adjusted for seasonal sun movement. This can be a challenge, especially for larger arrays or those with complex roof geometries. In contrast, single-axis trackers are generally easier to install and require less precision.
To mitigate these challenges, many solar installers use specialized software and tools to plan and execute the tracker installation. For example, they may use computer-aided design (CAD) software to create detailed models of the solar array and tracker system. This helps ensure accurate alignment and efficient installation, reducing the risk of costly errors or delays.
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