What requirements should the design of solar street lights meet?

Solar street lights are energy-saving and environmentally friendly, using solar energy as energy for lighting, which has incomparable advantages over traditional street lighting. However, solar street lights also have something to be improved, that is, the energy storage of batteries, because this is related to continuous rainy days. , whether solar street lights can play the function of normal lighting. In other words, in terms of the system of the solar street light itself, how to optimize the design can ensure that there is still enough energy for lighting even in cloudy and rainy days. When designing solar street lights, there is a general principle that, on the premise of ensuring that the load power supply needs are met, determine the use of the least solar cell module power and battery module capacity to minimize the initial investment. Each link of the design must be based on actual requirements, otherwise each decision will affect the cost of construction. The data that solar street light manufacturers need to consider in the design process are as follows: meteorological data of the installation site, including monthly total solar radiation, direct radiation and scattered radiation, annual average temperature and maximum and minimum temperature, The longest continuous cloudy and rainy days, the maximum wind speed and special meteorological conditions such as hail and snowfall. Meteorological data generally cannot make long-term predictions, and can only be calculated based on an average standard over the past 20 years. There is the installation location, latitude, longitude and altitude. That is, according to the requirements of balanced charging of battery components, the daily radiation on the module surface is equal in summer and winter, but at the same time, the daily radiation of the module in the first winter half of the year should be maximized, so as to increase the solar radiation intensity of the module. The principle of power generation in weaker months is used to determine the optimal inclination angle of the solar cell module surface and its optimal power generation current value, and at the same time, the maximum accumulated continuous power deficit in the whole year is calculated. Reasonable matching capacity of battery components. In a sense, solar street lights are equivalent to small independent power stations that are not connected to the grid, using maintenance-free sealed lead-acid battery components to store energy. After several days of continuous rainy days, the solar street light still works on time for the battery components, and the tested battery component discharge depth is 50%, and the system can still complete the lighting work after rainy days.