There are problems with solar street lamps

With the increasing shortage of traditional energy, the application of solar energy will become more and more widespread, especially in the field of solar power generation, which has developed into a mature sunrise industry in just a few years.
At present, one of the most important factors restricting the application of solar power generation is the price. Taking a two-way solar street lamp as an example, with a total load of 60 watts for both circuits (calculated based on the effective illumination of 4.5 hours per day, 7 hours per night, and an increase of 20% of the reserved amount of the battery panel in the middle and lower reaches of the Yangtze River), the battery panel needs about 160 watts, and calculated based on 4 yuan per watt, the cost of the battery panel will be 640 yuan, plus the cost of about 180 AH of battery pack is also around 1080 yuan, The one-time investment cost of the entire street lamp is significantly higher than that of the municipal circuit lamp, creating a major 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 lighting system. Generally, the battery has a warranty of three or five years, but generally, the battery will experience insufficient charging after one year or even half a year. Some actual charging rates may drop to around 50%, which will inevitably affect the normal lighting at night during continuous rainy days. Therefore, it is particularly important to choose a better battery.
3: Some engineering companies often choose LED lamps as lighting for solar street lamps, but the quality of LED lamps varies. LEDs with severe light decay may attenuate 50% of the illumination within half a year. Therefore, it is necessary to choose LED lamps with slow light attenuation, or choose electrodeless lamps, low-voltage sodium lamps, etc.
4: The selection of controllers is often a problem that is often overlooked by engineering companies. The quality level of controllers is uneven, and the market price of 12V/10A controllers varies from 100 to 200 yuan. Although it is the least valuable part of the entire street lighting system, it is a very important link. The quality of the controller directly affects the component life of the solar street lamp system and the procurement cost of the entire system. First, it is recommended to choose a controller with a low power consumption. The controller works continuously for 24 hours. If its own power consumption is large, it will consume some electrical energy. It is best to choose a controller with a power consumption of less than 1 milliampere (MA). 2： To select 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 during periods of insufficient lighting, the efficiency of MCT charging mode is about 20% higher than that of other controllers. 3： A controller with two channels of regulated power should be selected. Controllers with power regulation have been widely promoted. At night, when pedestrians are scarce, one or two channels of lighting can be automatically turned off, saving electricity, and power regulation can also be performed for LED lights. In addition to selecting the above power saving functions, attention should also be paid to the protection function of the controller for components such as the battery. Controllers with a trickle charging mode can effectively protect the battery and increase its life. In addition, when setting the controller undervoltage protection value, try to adjust the undervoltage protection value to ≥ 11.1V to prevent excessive discharge of the battery.
5: Attention should also be paid to anti-theft work in places far from the urban area. Many engineering companies have failed to effectively prevent theft due to construction negligence, resulting in the theft of components such as batteries and battery panels, not only affecting normal lighting, but also causing unnecessary property losses. In engineering cases, most of the stolen items are batteries, which are buried underground and poured with cement as an effective anti-theft measure
It is best to weld and reinforce the battery box installed on it.
6: Waterproof of controllers. Controllers are generally installed in lampshades and battery boxes, and generally do not receive water. However, in actual engineering cases, the connecting wires of controller terminals often have short circuits due to rainwater flowing into the controller along the connecting wires. Therefore, during construction, attention should be paid to bending the internal connecting line into a "U" shape and fixing it. The external connecting line can also be fixed into a "U" shape, so that rainwater cannot be poured into the controller and cause a short circuit. In addition, waterproof adhesive can be applied to the interface between the internal and external lines.
In many practical applications of solar street lamps, solar street lamps in many places cannot meet the normal lighting needs, especially in cloudy and rainy days. In addition to using related components with poor quality, another main reason is that they blindly reduce the cost of components, do not design and configure as required, and reduce the use standards of battery panels and batteries, resulting in the inability of street lamps to provide lighting in cloudy and rainy days.