What are Benefits of Offsetting Solar Arrays for Morning and Evening Sun?

Optimizing Solar Array Positioning

When designing an off-grid solar system, it’s essential to consider the optimal positioning of the solar array to maximize energy production during morning and evening hours. This can be achieved by adjusting the array’s azimuth to align with the sun’s movement at these times. A general rule of thumb is to orient the array at a south-facing angle in the northern hemisphere, with a tilt angle of 30-40 degrees. However, for morning and evening sun, the array’s azimuth should be adjusted by 20-30 degrees east and west, respectively, to track the sun’s movement. For example, if the optimal south-facing angle is 225 degrees, the array’s azimuth for morning sun could be set to 245 degrees (225 + 20 degrees), and for evening sun, it could be set to 205 degrees (225 - 20 degrees).

Benefits of Azimuth Adjustment

Adjusting the solar array’s azimuth for morning and evening sun can result in a significant increase in energy production, particularly during periods of low sun angles. Studies have shown that adjusting the array’s azimuth by 20-30 degrees can increase energy production by up to 10-15%. This is because the sun’s rays strike the array at a more optimal angle, resulting in a higher energy output. Additionally, this technique can also help to reduce the impact of shading on the array, which can further increase energy production. By incorporating azimuth adjustments into the design of an off-grid solar system, system owners can maximize their energy yield and enjoy greater energy independence.