Calculation method of reasonable allocation of solar street lamp power

With the increasing shortage of traditional energy, the application of solar energy will become more and more extensive, especially the field of solar power generation has developed into a mature sunrise industry in just a few years. 1: At present, one of the most important links restricting the application of solar power generation is the price. Take a two-way solar street light as an example, the total load of the two channels is 60 watts. Discharge for 7 hours and increase the reserved amount of the battery plate by 20%) The battery plate needs about 160W. Calculated at 20 yuan per watt, the cost of the battery plate is 3,200 yuan, and the cost of the battery pack of about 180AH is also 1,800 yuan. However, the one-time investment cost of the whole street lamp is much higher than that of the city circuit lamp, which has caused the main bottleneck in the application field of solar street lamps. 2: The service life of the battery should also be considered in the application of the entire street light system. The general battery is guaranteed for three or five years, but the general battery will be unsatisfactory after one year or even half a year. Some actual charging rates are It may drop to about 50%, which will definitely affect the normal lighting at night during continuous rainy days, so it is particularly important to choose a better battery. 3: Some engineering companies often choose LED lights as the lighting of solar street lights, but the quality of LED lights is uneven, and LEDs with serious light decay may attenuate 50% of the illuminance in half a year. Therefore, it is necessary to choose LED lamps with slow light decay, or use electrodeless lamps, low-pressure sodium lamps, etc. 4: The choice of controller is often a problem ignored by engineering companies. The quality of the controller varies. The market price of the 12V/10A controller ranges from 100-200 yuan, although it is the least valuable in the entire street light system. part, but it is a very important part. The quality of the controller directly affects the component life of the solar street light system and the procurement cost of the entire system. First, the controller with lower power consumption should be selected, and the controller will work 24 hours a day. If its own power consumption is large, it will Consume part of the power, it is best to choose a controller that consumes less than 1 milliamp (MA). Two: To choose a controller with high charging efficiency, the controller with MCT charging mode can automatically track the maximum current of the battery panel, especially in winter or periods of insufficient light, the MCT charging mode is about 20% more efficient than others. 3. A controller with two-way power regulation should be selected. The controller with power regulation has been widely promoted. It can automatically turn off one or two lights at night when there are few pedestrians, saving electricity, and can also adjust the power of LED lights. . In addition to selecting the above power-saving functions, you should also pay attention to the protection function of the controller for components such as batteries. For example, the controller with trickle charging mode can protect the battery well and increase the life of the battery. In addition, set the controller undervoltage protection. When the value is set, try to adjust the under-voltage protection value to ≥11.1V to prevent the battery from being over-discharged. 5: Attention should be paid to anti-theft work in places far away from the urban area. Many engineering companies have not carried out effective anti-theft measures due to negligence in construction, resulting in the theft of batteries, battery panels and other components, which not only affects normal lighting, but also causes unnecessary property loss. At present, most of the stolen batteries in engineering cases are batteries. It is an effective anti-theft measure to bury the batteries in the ground and pour them with cement. It is best to weld and strengthen the battery box installed on the light pole. 6: The waterproof of the controller, the controller is generally installed in the lampshade and battery box, and generally does not enter the water, but in the actual engineering case, the connecting wire of the controller terminal is often short-circuited because the rainwater flows into the controller along the connecting wire. Therefore, during construction, attention should be paid to bending the internal connecting wire into a U-shape and fixing it, and the external connecting wire can also be fixed into a U-shape, so that the rainwater cannot get in and cause a short circuit of the controller. In addition, waterproofing can be applied to the interface of the internal and external wires. glue. 7: In many practical applications of solar street lights, solar street lights in many places cannot meet the needs of normal lighting, especially in cloudy and rainy days. In addition to the use of related components of poor quality, another main reason is to blindly reduce the cost of components , It is not designed and configured according to the requirements, and the use standard of battery panels and batteries is reduced, so the street lamps cannot provide lighting in rainy days.