Calculation method for the installation Angle of residential solar energy

The calculation of the installation Angle of residential solar energy requires a comprehensive consideration of multiple factors. The following are some common calculation methods:

A simple calculation method based on latitude

General formula: The installation Angle is usually related to the local latitude. A simple calculation formula is "Installation Angle = latitude + Δ", where Δ is an adjustment value, generally ranging from 5 to 15 degrees. For instance, in an area with a latitude of 30 degrees, the initial installation Angle might be between 35 and 45 degrees.

Adjustment in different latitude regions

Low-latitude regions (0-25 degrees) : The installation Angle is generally close to the latitude value, or about 5 degrees more than that. For instance, in the Hainan region, where the latitude is relatively low, the recommended installation Angle is 10 to 13 degrees, which is usually 5 degrees lower than the latitude. This is because the sun often moves to the north in summer and typhoons are frequent there, so the installation Angle should not be too large.

Mid-latitude regions (26-40 degrees) : The installation Angle can be increased by 5-10 degrees on the basis of the latitude.

High-latitude regions (41 degrees and above) : The installation Angle can be increased by 10 to 15 degrees based on the latitude. For instance, in the three northeastern provinces where the latitude is relatively high, it is recommended that the installation Angle reach 30 to 40 degrees, and it is generally parallel to the roof Angle. This is because there is snow and strong winds in winter. An Angle that is too large is not conducive to wind resistance, while an Angle that is too small is not conducive to snow drainage.

A calculation method considering seasonal demand

Maximizing power generation in winter: If you want the solar panels to generate the maximum power in winter, you can increase the latitude by about 15 degrees to determine the installation Angle. For instance, in regions with a latitude of 40 degrees, the optimal installation Angle in winter is approximately 55 degrees.

Maximizing power generation in summer: If the focus is on summer use, the installation Angle can be determined by subtracting 10 to 15 degrees from the latitude. For instance, in regions with a latitude of 35 degrees, the optimal installation Angle in summer is approximately 20 to 25 degrees.

Balanced power generation throughout the year: To achieve a relatively balanced power generation throughout the year, the installation Angle can take the local latitude value or be slightly adjusted based on it.

Calculation methods in special circumstances

Near the equator: Solar panels can be placed flat or nearly flat to achieve better power generation effects.

In areas with snow accumulation: The installation Angle should take into account snow sliding, generally greater than 50-60 degrees, but also comprehensively consider factors such as power generation efficiency.