A single-axis tracking system is more expensive than a typical fixed-tilt or roof-mounted array but can generate ___% more energy.

A single-axis tracking system is more expensive than a typical fixed-tilt or roof-mounted array but can generate ___% more energy.

• A. 25
• B. 30
• C. 33
• D. 20

Answer: (D)

A single-axis tracker improves energy production by allowing panels to follow the sun along one axis, increasing the amount of sunlight captured over the course of the day compared with a fixed-tilt or roof-mounted array. That extra capture translates into more energy, but the gain isn’t the same everywhere—it depends on location, latitude, weather, system design, and shading. In typical installations, the energy yield is about a fifth higher than a fixed array, which is why this option is commonly given as the standard estimate. Keep in mind that in some sites the gain can be a bit higher or lower, but twenty percent is the conventional figure used for planning and comparisons.

A single-axis tracker improves energy production by allowing panels to follow the sun along one axis, increasing the amount of sunlight captured over the course of the day compared with a fixed-tilt or roof-mounted array. That extra capture translates into more energy, but the gain isn’t the same everywhere—it depends on location, latitude, weather, system design, and shading. In typical installations, the energy yield is about a fifth higher than a fixed array, which is why this option is commonly given as the standard estimate. Keep in mind that in some sites the gain can be a bit higher or lower, but twenty percent is the conventional figure used for planning and comparisons.