How to determine the best orientation for solar street lights during a site survey?

There are several key factors to consider when conducting a site survey to determine the optimal orientation for solar street lights:

Geographic latitude: Most of China is located in the mid-latitudes of the northern hemisphere, and the ideal orientation for solar panels is usually due south. However, given the westerly position of the sun in the afternoon in North China, appropriately orienting the panels to the southwest can increase light absorption in the afternoon hours.

Seasonal Variations: Since the sun's path varies with the seasons, the optimal orientation may need to take into account the average summer and winter sun angles. The sun's altitude angle is higher in the summer and lower in the winter, so the design may require a compromise or an adjustable angle mounting.

Shade Analysis: Carefully observe the surroundings during the site survey to ensure that the orientation of the solar panels will not be obscured by buildings, trees, etc. Avoid shading in the morning or evening when the sun is at a low angle, affecting light efficiency.

Tilt angle: In addition to orientation, the tilt angle of the panels is also important. In general, tilt angles close to the local latitude maximize total annual energy absorption. However, in specific cases, the angle is adjusted according to the insolation model to fit the local sunshine pattern.

Intelligent tracking systems: For more advanced applications, consider a solar tracking system that automatically adjusts the angle of the panels to track the sun's position in real time, but this can add cost and maintenance complexity.

Hours of sunlight and intensity: Analyze historical weather data to understand the number of hours of sunlight and the intensity of sunlight in different seasons, and optimize orientation accordingly to ensure effective solar energy collection even in seasons with minimal sunlight.

Simulation and Calculation: Use software tools to perform simulations and input parameters such as specific geographic locations, seasons, shading, etc. to calculate the optimal orientation and tilt angle.

Field test: If conditions permit, small-scale field tests can be conducted to compare the actual power generation under different orientations, so as to verify the theoretical calculations.

By combining the above factors with the sunshine data of the specific geographic location and the actual situation on site, the optimal orientation of the solar street light panels can be accurately determined to maximize their energy collection efficiency and ensure efficient operation in remote areas.