The working principle of solar lights
Solar street light is composed of solar cell components, including bracket, LED lamp holder, control box, controller, battery and light pole.
The luminous efficiency of solar panels reaches 127Wp/m2 and the power is high, which is very beneficial to the wind resistance planning of the system. In the lamp holder part, 1W white LED and 1W yellow LED are integrated on the printed circuit board and arranged in a certain distance dot matrix as the plane light source.
Operation principle introduction: solar cells made using the principle of photovoltaic effect. During the day, solar panels receive solar radiant energy and convert it into electrical energy output, which is stored in the battery through the charge and discharge controller.
At night, when the illuminance gradually drops to about 10lux and the open circuit voltage of the solar panel is about 4.5V, the charge and discharge controller will act after detecting this voltage value, and the battery will discharge the lamp cap. After the battery is discharged for 8.5 hours, the charge and discharge controller will act and the battery is discharged. The primary function of the charge and discharge controller is to maintain the battery.
Compared with general solar lighting, the planning of solar street lights has the same basic principles, but there are more links to consider. The following will analyze the following aspects of LED high-power street lights.
led based solar street light- HOMMIIEE
Solar cell module selection planning requirements
1. The load input voltage is 24V, the power consumption is 34.5W, and the working hours are 8.5h per day. Ensure that there are 7 consecutive cloudy and rainy days. The average annual radiation in the past two decades is 107.7Kcal/cm
2. After a brief calculation, the peak sunshine hours in this area is about 3.424h. The minimum total power of solar modules = 17.2¡Á5.9=102W. The selection of standard battery modules with peak output power of 110Wp and a single block of 55Wp should be able to ensure that the street lamp system is in a year Normal operation in most cases.
The calculation of battery capacity planning is simpler than the peak wattage of solar modules. According to the above calculation, the daily power consumption of the load is 12.2AH. When the battery is overfilled, it can work continuously for 7 rainy days.