Solar street light equipment accounting

With the increasing shortage of traditional power, 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: One of the most important links currently restricting the use of solar power generation is the price. Take a two-way solar street light as an example, the total load of the two roads is 60 watts. Discharge for 7 hours and add 20% of the battery plate to the calculation) the battery plate needs about 160W. According to the calculation of 20 yuan per watt, the cost of the battery plate is 3200 yuan, and the cost of the battery pack of about 180AH is also 1800 yuan. At the same time, the one-time investment cost of the entire street lamp is much higher than that of the city circuit lamp, forming the main bottleneck in the application field of solar street lamps. 2: The service life of the battery can also be considered. In the application of the entire street light system, the usual battery warranty is three or five years, but the usual battery will be unsatisfactory after one year or even half a year. Some practical charging rates It can drop to about 50%, which will definitely affect the normal lighting at night during successive rainy days, so it is particularly important to choose a better battery. 3: Some engineering companies often use LED lights as the lighting of solar street lights, but the quality of LED lights varies, and LEDs with severe light decay can attenuate 50% of the illuminance in half a year. Therefore, we must choose LED lamps with slow light decay, perhaps using electrodeless lamps, low-pressure sodium lamps, etc. 4: The selection of controllers is often a question ignored by engineering companies. The quality of controllers varies. The market price of 12V/10A controllers ranges from 100-200 yuan, although it is the least valuable in the entire street light system. Some, 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 acquisition cost of the entire system. One: The controller with lower power consumption may be selected, and the controller operates 24 hours a day. If its own power consumption is large, then It will consume some power, and it is best to choose a controller that consumes less than 1 milliamp (MA). Two: To choose a controller with high charging power, the controller with the MCT charging mode can actively pursue the maximum current of the battery panel, especially in winter or in the period of lack of light, the MCT charging mode is about 20% higher power than other charging modes. 3. A controller with two-way power conditioning should be selected. The controller with power conditioning has been widely implemented. It can automatically close one or two roads of lighting at night when pedestrians are sparse, save electricity, and can also adjust the power of LED lights. . In addition to selecting the above power-saving functions, it is also possible to pay attention to the maintenance function of the controller for components such as batteries. For example, the controller with trickle charging mode can protect the battery very well and increase the life of the battery. When the undervoltage maintenance value is set, try to adjust the undervoltage maintenance value to ≥ 11.1V to avoid over-discharge of the battery. 5: In places far away from the urban area, attention should be paid to anti-theft operations. Many engineering companies did not carry out effective anti-theft due to neglect of construction, resulting in the theft of batteries, battery panels and other components, which not only affected normal lighting, but also caused unnecessary property loss. In the current engineering cases, most of the stolen batteries are batteries. It is an effective anti-theft method to bury the battery in the ground and pour it with cement. 6: The waterproofing of the controller, the controller is usually installed in the lampshade and battery box, and usually does not enter the water, but in practical engineering cases, the connecting wire of the controller terminal is often short-circuited due to rainwater flowing into the controller along the connecting wire. Therefore, during construction, attention should be paid to bending the internal connecting line into a U-shape and fixing it, and the external connecting line can also be fixed into a U-shape, so that the rainwater cannot get in and cause a short circuit of the controller. Others can also be modified at the internal and external line interfaces. waterproof glue. 7: In the practical application of many solar street lights, many local solar street lights cannot meet the normal lighting needs, especially in cloudy and rainy days. In addition to the use of low-quality related components, another main reason is to blindly reduce components. The cost, the equipment is not designed according to the needs, and the application specifications of the battery panels and batteries are reduced, so the street lamps cannot provide lighting on rainy days.