The main components of solar LED street light
The main components of solar LED street light: solar panels, street lights, charge and discharge controllers and batteries. Solar LED street light manufacturer is a solid-state cold light source, which has the characteristics of environmental protection, no pollution, low power consumption, high light efficiency, and long life. Therefore, solar LED street light will become the best choice for energy-saving road lighting. Solar LED street light is a kind of high-efficiency solid-state light source formed by semiconductor PN junction that can emit light with weak electric energy. Under a certain forward bias voltage and injection current, it injects holes in the P area and injects into the N area. After the electrons diffuse to the active area, they are combined by radiation to emit photons, which directly convert electrical energy into light energy. Its working principle is that during the day, the photovoltaic panel absorbs the radiant energy of solar energy through radiation, generates electromotive force, generates current, and charges it into the battery through the charge and discharge controller. Solar LED street light is a kind of high-efficiency solid-state light source formed by semiconductor PN junction that can emit light with weak electric energy. Under a certain forward bias voltage and injection current, it injects holes in the P area and injects into the N area. After the electrons diffuse to the active area, they are combined by radiation to emit photons, which directly convert electrical energy into light energy. When the current is lower than 6 amperes, the system thinks that the sun already exists at this time. When it drops, the controller will stop charging and start to enter the discharge mode, releasing power from the battery to the lamp. At this time, the lamp holder can be lit.
There are several key points in the design of solar LED street light system. First, the luminous flux and the power of the lamp. Second, the length of time to turn on the lights every night. Because each place is different, or the owner is different, or the application environment is different, the requirements for light length and dimming curve are different every night. The third is the requirement of continuous rainy days. The so-called continuous rainy days refer to the days when there is no charge for rainy days. Simply put, if you unplug the photovoltaic panel, the number of days that the battery can work at full capacity when it is fully charged. The fourth is where it is applied, the solar radiation resources in this area, and the best lighting angle.
Through my analysis, my goal is to share this with you today, so that you can learn a lot how to do the configuration calculation of the solar LED street light system.
The first lamp has power. Assuming 30 w per day, lighting time, 5 hours 100%, 5 hours 50%. This means that the total power for a day is 7.5 hours. Three consecutive cloudy days need to be supported.. Use the currently more popular 12.8V lithium iron phosphate battery.. First, calculate the daily power consumption. Full power is 30 W per day, and full power is 7 hours per day. This means that 210 watts are consumed per day in a cycle of 30 × 7 hours. In a 12.8 volt system, the capacity of this battery is 16.4. But it must pay attention to 12.8 volts, because many of them now use 3.2 volts.
We know that 210 watt hours, or 16.4am hours of 12.8 volts, is the daily energy consumption. If it takes two to three consecutive days, it means 630 watt hours. Consider the depth of discharge of lithium batteries. Assuming a 100 watt hour discharge, it is impossible to release 100 watt hours. The maximum emission is 90%, so consider 90% of the emission depth. Because the battery is low voltage, the battery will be transported to the lamp through the cable. There will be some loss, wire loss, assuming 10% wire loss, so 630w is removed from 0.9. We have 778 watt-hours. This capacity is the battery capacity, we need to configure this system.
Let us look at a quick calculation of photovoltaic panel capacity. We have just calculated that if the capacity of the photovoltaic panel is calculated at 210 watt-hours per day, then the capacity of the photovoltaic panel will need to be charged one day, that is to say, the daily electricity consumption is 16.4 ampere hours. According to the difference of the available sunshine time in various places, assuming the available sunshine time, the effective time is 4 hours. 16.4 ampere hours divided by 4 hours equals 4.
