1: Currently, one of the most important factors restricting the application of solar power generation is the price. Take a two-way solar street lamp as an example. The total load of the two roads is 60 watts. (Effective light 4.5h/day and night in the middle and lower reaches of the Yangtze River. Discharge 7 hours, increase the battery board 20% reservation amount calculation) its battery board needs about 160W, according to 30 yuan per watt, the battery board costs 4800 yuan, plus 180AH battery pack costs around 1800 About one-time, the one-time investment cost of the entire street lamp is much higher than that of the city circuit lamp, causing major bottlenecks in the application of solar street lamps.
2: The battery life should also be considered in the application of the entire street light system, generally have three or five years warranty for the battery, but generally the battery will be dissatisfied with the situation in one year or even six months later, some of the actual charge rate It may drop to about 50%, which will affect the normal lighting at night during continuous rainy days, so it is especially important to choose a better battery.
3: Some engineering companies often use LED lights for solar street lighting, but the quality of the LED lights is not uniform, and the light failure is so severe that LED can attenuate 50% of illumination for half a year. Therefore, we must choose LED light with slower light decay, or use non-polar light, low pressure sodium light and so on.
4: The controller has to be selected is often ignored by the project to a problem, the controller has a quality layer, 12V/10A controller market price in the range of 100-200 yuan, although the value of the entire street lamp system is the minimum In part, but it is very important to have a link. The controller has a direct impact on the lifetime of the components of the solar street light system and the procurement cost of the entire system:
One: Should choose the controller that the power consumption is relatively low, the controller works uninterruptedly for 24 hours, if its own power consumption is greater, it will consume some electric energy, it is better to choose the controller that the power consumption is below 1 milliamperes (MA) .
Two: To select the controller with high charging efficiency, the controller with MCT charging mode can automatically track the maximum current of the battery board, especially in the winter or when the light is insufficient. The MCT charging mode is about 20% more efficient than others.
Three: should choose to have two ways to adjust the power of the controller, with the power to adjust the controller has been widely promoted, in the rare pedestrians at night can automatically turn off one or two road lighting, saving electricity, but also for LED lights for power regulation . In addition to selecting the above power saving function, the controller should also pay attention to the protection functions of the battery and other components. The controller with a trickle charge mode can protect the battery well, increase the battery life, and set the controller undervoltage protection. When valued, try to adjust the undervoltage protection value to ≥ 11.1V to prevent the battery from overdischarging.
5: It is necessary to pay attention to the anti-theft work from places far away from the urban areas. Many construction companies have not carried out effective anti-theft measures because of construction negligence. As a result, batteries, panels, and other components have been stolen. This not only affects the normal lighting, but also causes unnecessary. property loss. At present, in engineering cases, most of the stolen goods are batteries. It is an effective anti-theft measure that the battery is buried in the underground cement. It is best to add a battery box on the pole to weld it.
6: The controller is waterproof. The controller is generally installed in the lampshade and the battery box. Generally, it will not enter the water. However, in the actual project case, the controller terminal is connected to the controller because the rainwater flows into the controller along the connecting cable and causes a short circuit. Therefore, during construction, attention should be paid to bending the internal connection wire into a “U” shape and a solid type. The external connection wire can also be fixed to a “U” type so that rain will not leak into the controller and cause a short circuit. Apply waterproof glue to the interface.
7: In many practical applications of solar street lamps, solar street lamps in many places can not meet the normal lighting needs, especially in the rainy days, in addition to the use of poor quality related components, the other main reason is to blindly reduce the cost of components , Design and configuration not in accordance with requirements, reducing the use of batteries and battery standards, so that in the rainy days, street lamps can not provide lighting.
