The efficiency of power generation of split solar LED street lights largely depends on the effect of sunlight absorption by photovoltaic panels. Apart from sunshine and weather conditions, the orientation and installation angle of the photovoltaic panels are the most important human-induced factors. A reasonable orientation and angle can maximize the reception of solar radiation, improve the energy storage efficiency, and guarantee the stable illumination at night. On the other hand, the device may be oriented improperly, resulting in low power generation, low battery life, and low brightness. Below, TIANXIANG analyzes the influencing principles and practical points from three dimensions.
I. Photovoltaic Panel Orientation
1. Difference in Orientation from North to South
Take my country as an example. My country is in the Northern Hemisphere. The sun shines from the south all year round. For photovoltaic panels, the best orientation is south, as it receives the most sunlight during the day. If the orientation is not in the middle (east or west), the effective sunlight exposure time will be shortened, which will also greatly shorten the utilization rate of sunlight in the early morning or evening and reduce the overall power generation by 15%-30%. A north-facing orientation is basically useless and is a forbidden orientation for separated panel solar street light installations.
2. Effect of Offset Angle
A small east-west offset can meet the needs of the scenario, but the bigger the offset angle, the bigger the loss of power generation. If the offset is toward the east, it is subject to the morning sun. If the offset is toward the west, it is subject to the afternoon sun. In either case, the sunlight received is not even, and the high-intensity midday sun is not used to the maximum, and the average power generated over the day.
II. Installation Tilting Angle
1. Disadvantages of Excessive Tilt
Angle The tilt angle of the photovoltaic panel is too large, so that the midday vertical sunlight cannot reach the surface of the panel, thus reducing the area of sunlight reception, and making it easier to accumulate dust, rain and snow, which blocks sunlight, and the photoelectric conversion efficiency is greatly reduced, especially in the summer, the strong sunlight hours are extremely noticeable in terms of power generation loss.
2. Disadvantages of Insufficient Tilt Angle
If the tilt angle is insufficient, the panel surface will not receive sufficient low-angle sunlight in winter, which will lead to a sharp decline in winter power generation. At the same time, the near-horizontal surface of the panel has poor drainage and dust removal ability, and the long-term accumulation of dirt and water will block the photovoltaic modules, resulting in continuous low power generation efficiency.
III. Angle Flexibility
1. Latitude Adaptability by Region
The angle of the sunlight varies by latitude. High latitudes need a greater tilt angle to adapt to the low angle of sunlight in winter; low latitudes need a slightly smaller tilt angle to adapt to direct sunlight in summer. Uneven power generation will occur throughout the year if the split angle of the separated panel solar street lights is not adjusted according to the latitude.
2. Seasonal Sunlight Adaptability
A fixed angle does not accommodate sunlight in all four seasons. An adapted angle standard can balance the efficiency of power generation in winter and summer. By adjusting the angle appropriately, the problem of excessive power generation in summer and insufficient power generation in winter can be avoided, allowing the separated panel solar street light to operate in a stable energy-storage state year-round.
Here is the end of TIANXIANG’s explanation of the orientation and angle of photovoltaic panels. With proper installation, the performance of solar street lights can be fully utilized, and long-term stable lighting can also be ensured. We specialize in different types of split solar LED street lights, and support customization and bulk purchase. Our split solar LED street lights are reliable, affordable, and of good quality. Should you have any questions or wish to place an order, feel free to reach out to us.
Post time: Jun-03-2026
