Solar street lights are composed of solar panels (including brackets), lamp holders, control boxes (with controllers, batteries, etc. inside), light poles, and foundations. Solar street lamps generally have their own power supply system and are not connected to the conventional street lamp power supply network. There are two main types of solar street lighting systems: 12V and 24V.
1 Solar Cell Selection
l. type
Solar cells convert solar energy into electricity. The more practical ones are monocrystalline silicon, polycrystalline silicon, and amorphous silicon solar cells.
1) The performance parameters of monocrystalline silicon solar cells are relatively stable. Suitable for more rainy days, relatively sunny
It is not very sufficient for use in the southern region;
2) The production process of polycrystalline silicon solar cells is relatively simple, and the price is lower than that of monocrystalline silicon. suitable for sunlight
Sufficient and sunny eastern and western regions;
3) Amorphous silicon solar cells have relatively low requirements on sunlight conditions, and are suitable for use in areas with insufficient outdoor sunlight.
2. Operating Voltage
The operating voltage of the solar cell is about 1.5 times the voltage of the battery to ensure normal charging of the battery. If you need to use 8~9V to charge a 6v battery
Solar cells, 15-18V solar cells are needed to charge the 12V battery. 33-36V solar cells are needed to charge the 24V storage battery.
3. Output power Wp
The output power per unit area of solar cells is about 127Wp/m2.
Solar cells are generally composed of multiple solar cells connected in series, and their capacity depends on the total energy consumed by the lighting source and line transmission components.
Power and local solar radiation energy. The output power of the solar battery pack should be more than 3 to 5 times the power of the light source:
In the short area, it is more than (3-4) times, and vice versa, it is more than (4-5) times. 4 Average peak sunshine hours h
The output power Wp of the solar cell is the 10l standard defined by the European Commission under standard sunlight conditions.
Accurate, radiation intensity 1000W/m2
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The output power of solar cells under the conditions of air quality AM1.5 and battery temperature 252C. At different times and in different places, the output power of the same solar cell is different. The so-called standard conditions are close to the sunshine conditions around noon on a sunny day.
Post time: Nov-17-2022