What factors contribute to uneven shading on solar arrays?

Obstacles and Terrain Irregularities

Obstacles such as trees, buildings, and hills can cast shadows on solar arrays, leading to uneven shading. Trees with dense foliage can produce deep shadows, while buildings can create long, narrow shadows. Terrain irregularities like hills and valleys can also cast shadows, especially during the winter months when the sun is lower in the sky.

Array Angle and Position

The angle and position of the solar array itself can also contribute to uneven shading. If the array is installed at a shallow angle, it may be more susceptible to shadows from nearby obstacles. Additionally, if the array is installed near a slope or hill, it may experience uneven shading due to the changing angle of the sun throughout the day.

Shading Calculation and Mitigation

To mitigate uneven shading, it’s essential to calculate the shading risk before installing a solar array. This can be done using software or by conducting a site survey. One technique is to install a smaller array with a higher angle, which can help reduce the impact of shading. Another technique is to use tracking systems, which can adjust the angle of the array to maximize energy production.