As an important economy in the Middle East, Saudi Arabia’s highway network plays a key role in the country’s development. With the increasing emphasis on sustainable development and energy efficiency, solar street lights are increasingly used in Saudi highway lighting projects. However, in view of Saudi Arabia’s unique geographical and climatic conditions, especially high temperature and high sunshine, the design of solar street lights must fully consider their design life, and accurately match power and battery capacity on this basis to ensure long-term stable operation of the system.

Ask for . Under these standards, solar street lights need to meet strict lighting performance indicators. At the same time, Saudi Arabia’s high temperature environment (which can reach over 50°C in summer) poses severe challenges to the LED light source and battery life of solar street lights. High temperature will cause LED light decay to accelerate and battery capacity to decay, thereby affecting the design life and reliability of the entire system.

The life of an LED light source is usually measured by Lumen Maintenance. For example, LB means that after a specific working time, the lumen output of at least 90% of LED lamps can still maintain more than 80% of the initial value. In the high-temperature environment of Saudi Arabia, the heat dissipation design of LEDs is crucial. The efficient heat dissipation structure can effectively reduce the LED junction temperature and slow down the light decay rate. Choosing high-quality, high-temperature-resistant LED chips and driving power supplies is the basis for ensuring a long life of the light source.

The efficiency and anti-fading ability of solar panels directly affect the power generation of the system. In Saudi Arabia's high-insolation areas, it is crucial to choose monocrystalline silicon or polycrystalline silicon solar panels with excellent high-temperature performance and resistance to PID (Potential Induced Degradation) effects. In addition, regular cleaning of dust on the surface of solar panels to maintain their optimal power generation efficiency is also a factor that needs to be considered in design and maintenance.

\text{Battery capacity (Ah)} = \frac{\text{Lamp power (W)}\times \text{Operation hours per night (h)} \times \text{Days of autonomy} \times\text{System voltage correction coefficient}}{\text{Battery voltage (V)} \times \text{Depth of discharge (DoD)} \times \text{Battery efficiency}} Among them, the system voltage correction coefficient is usually 1.2-1.25 to compensate for line loss and temperature effects. Depth of discharge (DoD) is important for extending battery life. Lithium iron phosphate batteries usually allow a higher depth of discharge (such as 80%), while lead-acid batteries recommend a lower depth of discharge (such as 50%).

3. Battery management and thermal management in high temperature environments

In order to cope with Saudi Arabia's high temperature challenges, advanced battery management systems (BMS) and thermal management technologies are essential. BMS can monitor the voltage, current and temperature of the battery in real time to prevent overcharge, over-discharge and overheating, thereby extending battery life. Passive or active cooling systems, such as the use of special heat dissipation materials, optimized battery compartment structures, or integrated fans, can effectively control the battery operating temperature and ensure stable operation within the design life.

4. Conclusion