With traditional energy sources increasingly scarce, the application of solar energy will be more and more widely, especially in the field of solar power in just a few years has developed into a mature sunrise industry. 1: one of the most important part of restricting the application of solar power prices to a Dual solar street lights, for example, two load of 60 watts (effective illumination of the middle and lower reaches of the Yangtze River 4.5h / day, night and to discharge seven hours, increase reserved for calculating the amount of the battery plates 20%) on the battery plate 160W about 20 yuan per watt, the cost of the solar panels will be 3,200 yuan, plus on 180AH battery bank fees in 1800 or so, the entire street light one-time investment costs are much higher than the city circuit lights, causing a major bottleneck for solar street lighting applications. 2: the battery life should also be considered in the entire streetlight system applications, general battery warranty for three years or five years, but general battery in a year, or even half a year later there will be charging dissatisfaction with the situation, some of the actual charge rate may drop to about 50%, which will affect consecutive rainy days during the normal lighting at night, it is especially important to choose a better battery. 3: Some contractors are often used in LED lights as solar street lighting, LED lights of varying quality, the serious light failure LED six months it is possible to attenuation 50% illumination. So be sure to choose the light fades slower LED lights, or choice of electrodeless lamp, low pressure sodium. 4: controller of choice is often ignored Contractors is a problem, the quality of the controller layer difference arrhythmia, 12V/10A controller market price of 100-200 per month, although the entire street lighting system in the value of the minimum part, but it is a very important aspect. Controller will have a direct impact on the cost of solar streetlight system component life as well as the procurement of the system as a whole, one: should choose a low-power controller, controller 24 hours of uninterrupted work, as its own power consumption, will consume some energy, it is best to choose the controller of the power consumption of less than 1 mA (MA). II: To select the high charging efficiency of the controller, and having MCT charging mode, the controller can automatically track the maximum current of the battery plate, especially in the winter period or insufficient light, MCT charging mode is higher than the other by about 20% efficiency. : Should be selected with two-way adjustable power controller with power conditioning controller has been widely promoted in the nighttime pedestrian scarce period can automatically turn off all the way or two-way lighting, to conserve electricity can also power regulation for LED lights . In addition to select more than saving function, should also pay attention to the protection features of the controller batteries and other components, like a trickle charge mode controller can well protect the battery, increasing battery life, another set controller undervoltage protection value, try to tune the undervoltage protection value in ≥ 11.1V prevent the battery from over-discharge. 5: place far from the urban areas should pay attention to security work, many contractors because construction negligence, there is no effective anti-theft, resulting in the theft of batteries, solar panels and other components, not only affects the normal lighting, but also resulted in unnecessary damage to property. Projects stolen mostly for the battery, the battery buried underground with cement pouring is an effective anti-theft measures, in the light pole...