The influence of temperature factors on the lighting time of solar street lights

In the design and application of solar street lights, temperature is a crucial consideration. Temperature not only directly affects the power generation efficiency of solar panels, but also has a profound impact on the lighting time and overall performance of street lights.

Relationship between solar panel efficiency and temperature
As the core component of solar street lights, the main function of solar panels is to convert light energy into electrical energy. However, there is a significant negative correlation between the efficiency of solar panels and the ambient temperature. Studies have shown that the efficiency of solar panels decreases significantly with increasing temperature. This phenomenon is mainly due to the fact that high temperature increases the recombination rate of electrons and holes inside the panels, thereby reducing the generation of photocurrent. In addition, high temperature will also cause the internal resistance of the panels to increase, further reducing its power generation efficiency.
Specifically, under high temperature conditions, the open circuit voltage and short circuit current of solar panels will decrease, resulting in a decrease in overall efficiency. This decrease in efficiency directly affects the charging capacity of solar street lights, thereby shortening their lighting time. In the hot summer, the impact of high temperature on solar panels is particularly obvious, which may cause the lighting time of street lights at night to be greatly shortened.

The influence of lithium battery energy storage capacity and temperature
Lithium batteries are indispensable energy storage components in solar street lights. They are responsible for storing the electricity generated by solar panels and providing power for street lights at night or on rainy days. The energy storage capacity of lithium batteries is also significantly affected by temperature. In high temperature environments, the chemical reaction rate of lithium batteries is accelerated, and the internal heat increases, which accelerates the aging process of the battery and shortens its service life. At the same time, high temperature will also reduce the charging and discharging efficiency of lithium batteries, reduce their available capacity, and limit the lighting time of solar street lights.
Conversely, in low temperature environments, the performance of lithium batteries is also affected. Although low temperature does not directly cause the aging of lithium batteries, it will significantly reduce their working efficiency. Under low temperature conditions, the fluidity of the electrolyte inside the battery is weakened, affecting the charging and discharging performance of the lithium battery. Therefore, in the cold winter, the lighting time of solar street lights may also be restricted due to the decline in lithium battery performance.

The influence of temperature on the overall performance of solar street light systems
The influence of temperature on the overall performance of solar street light systems is multifaceted. In addition to the direct impact on solar panels and lithium batteries, temperature changes may also indirectly affect the lighting effect of street lamps by affecting the performance of other components such as controllers and lamps. For example, high temperatures may accelerate the aging of electronic components inside the controller, thereby reducing its control accuracy and stability. In low temperature environments, the luminous efficiency of LED chips inside lamps may decrease, directly affecting the lighting effect of street lamps.