Solar Power Has Been Developed Rapidly With the increasingly serious energy shortage and environmental pollution, all countries are looking for solutions to the energy crisis. The use of solar energy, a renewable energy source, has led to the rapid development of solar photovoltaic technology. Solar energy is the most direct, most common, and cleanest energy source on the earth. As a huge renewable energy source, the radiant energy reaching the surface of the earth every day is equal to 2.5 billion barrels of oil, which can be said to be inexhaustible energy. This article introduces the working principle and composition of solar energy as the usage of the street lights. The Working Principle Of The Solar Energy-efficient Street Light System The working principle of the system is: solar panels receive solar radiant energy and converted it into electric energy output by the advantage of the principle of photovoltaic effect during sunshine, and generates a constant voltage charging current, which is charged to the energy storage battery through the solar controller. At night, when the sunlight illuminance weakens to a certain degree and the open-circuit voltage of the solar panel drops to the set value, the solar controller detects this voltage value and then acts, the light control starts automatically, and the battery transfers to the load through the controller. Power supply to light the ceramic metal halide lamp. To light the ceramic metal halide lamp(HID), it must be equipped with a corresponding metal halide lamp rectifier. When starting, the trigger generates an instantaneous high voltage (6KV) to ignite, and then the rectifier is ballasted to maintain the load in normal operation. The Composition Of Solar Energy Efficient Street Light System Solar high-efficiency street lights are mainly composed of solar cell modules (PV MODULE), energy storage batteries (BATTERY), and solar Controller, ceramic metal halide lamp(HID) and metal halide lamp rectifier. 1. Solar Cell Modules (PV MODULE) Solar cell components mainly include monocrystalline silicon solar cells, polycrystalline silicon solar cells, and amorphous silicon solar cells. The photoelectric conversion efficiency of monocrystalline silicon solar cells is about 15%, and the highest is 24%. This is the highest photoelectric conversion efficiency of all types of solar cells at present, but the production cost is so high that it cannot be widely used in large quantities or used universally. The production process of polycrystalline silicon solar cells is similar to that of monocrystalline silicon solar cells, but the photoelectric conversion efficiency of polycrystalline silicon solar cells has to be reduced a lot. The material is easy to manufacture, saves power consumption, and has a lower total production cost. Therefore, it has been extensively developed. The manufacturing method of amorphous silicon solar cells is completely different from monocrystalline silicon and polycrystalline silicon solar cells. The process is greatly simplified, the silicon material consumption is low, and the power consumption is lower. Its main advantage is that it can generate electricity even in low light conditions. 2. Solar Battery According to the general load, the daily power consumption is 16.7AH. When the battery is full, it can work continuously for 7 rainy days, plus the first night’s work, the battery capacity: 6.7x*(7+ l)=133.6(AH), just choose 2 batteries of 12V150AH to meet the requirements. Our company can provide you with many kinds of solar cells with different capacities, with good quality and long service life. For example, 12V 75AH and 12V 150AH are very popular models. If you want to know more, please leave us a message on our website or you can check directly by https://www.velabattery.com/ or https://www.velabattery.com/product/lfp12150-12v-150ah-golf-cart-battery-2/ 3. Solar Controller The solar controller uses a single-chip microcomputer as the core processing chip, which has the characteristics of omni-directional, fully automatic, multi-functional and high-efficiency point, can meet the long-term and reliable operation of solar high-efficiency street lights under various conditions, with the following characteristics: ①The solar controller adopts MPPT technology (solar maximum power tracking technology), which can make the controller work in rainy days or after the battery is deeply discharged, it can obtain a current that can increase the plate capacity by 13 times. Maximum power point tracking (MPPT) makes the solar system always work in the maximum working state of power output, ensuring maximum solar output power under any light conditions, improving photoelectric conversion efficiency, more effective use of solar energy, and improving the efficiency of the entire system. ②The solar controller works according to the remaining capacity of the battery S0C. When the lights are turned on every night, the smart chip of the controller calculates the remaining capacity of the battery according to the mathematical model, and automatically adjusts the lighting time according to the size of the S0C, so the system always works at the minimum Load work, so that the battery can be restored to the floating state as soon as possible, effectively protect the battery, extend the service life of the battery, and greatly improve the reliability of the system. 4. Metal Halide Lamp Rectifier A metal halide lamp rectifier is a device that restricts current and generates an instantaneous high voltage on fluorescent lamps. It is made by winding enameled wire on an iron core made of silicon steel. Such a coil with an iron core will generate self-inductance when it is turned on/off instantaneously. High voltage is applied to the electrodes (filaments) at both ends of the fluorescent tube. 5. Ceramic Metal Halide Lamp(HID) It is a discharge lamp that is operated by an AC power source and produces arc discharge in the mixed vapor of mercury and rare metal halide. The metal halide lamp is a third-generation light source made by adding various metal halides to the high-pressure mercury lamp. Solar Battery For Street Light Has Been Very Promising The cost-effective characteristics of solar energy-efficient street lights are quite obvious, using green environmental protection, renewable energy, one-time investment, Long-term benefit. In lighting projects such as city square beaches and high-end villa areas, solar lamps will be the preferred lamps. Decorative lamps are favored by investors. Compared with the renewable, clean, and pollution-free solar energy and the environmental protection and energy saving of ceramic metal halide lamps, Conventional fossil energy sources are becoming increasingly tense, and the emissions generated after use will cause increasingly serious pollution to the environment. Therefore, as an emerging outdoor lighting product, solar lighting fixtures will bring us infinite vitality and broad market prospects.