6m solar panel and battery configuration calculation formula
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6-meter solar panel and battery configuration calculation formula: It is also convenient for customers to understand the specific configuration of the next 6-meter solar street light. One: First calculate the current: Such as: 12V battery system; 30W LED light.
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6-meter solar panel and battery configuration calculation formula: It is also convenient for customers to understand the specific configuration of the next 6-meter solar street light.
One: First calculate the current:
Such as: 12V battery system; 30W LED light.
Current=30W÷12V=2.5A.
Two: Calculate the battery capacity requirement:
For example, the accumulated lighting time of street lights every night needs to be 6 hours at full load; it needs to meet the lighting needs of continuous rainy and cloudy days for 5 days. (5 days plus the lighting of the night before the rainy day, totaling 6 days).
Battery = 2.5A × 6h × (5+1) days = 2.5A × 36h = 90AH.
In addition, in order to prevent the battery from overcharging and over-discharging, the battery is generally charged to about 90%; about 20% is left for discharge. So 90AH is only about 70% of the real standard in the application.
Three: Calculate the peak demand (WP) of solar panels:
The accumulated lighting time of street lights needs to be 6 hours (h) per night.
The solar panels receive an average of 4.5 hours (h) of effective light per day; less relax the 20% reserve for solar panels. WP÷18V=(2.5A × 6h × 120%) ÷ 4.5hWP÷18V=4.5.
WP = 80 (W): 4.5 hours of sunshine per day is the sunshine coefficient in the vicinity of the middle and lower reaches of the Yangtze River. In addition, in solar street light components, the line loss, the loss of the controller, and the power consumption of the ballast or constant current source are different. In actual applications, it may be about 5%-25%, so 80W is only a theoretical value. The situation needs to increase.
So we can conclude that the 6m 30 watt solar street light uses a 90AH battery and an 80 watt solar panel.
How to choose the power of solar street lights:
Then the problem of how much wattage the light source uses for the 6-meter solar street light can be solved. The power of solar street lights depends on the width of the road and the surrounding environment, the height depends on the width of the road, and the line spacing depends on the power of the light source and the secondary light distribution of the lamps. With the increasing shortage of traditional energy sources, the application of solar energy will become more and more extensive, especially in the field of solar power generation in a short period of several years.
The 6-meter solar street light has a wide range of applications. Generally, the use of 6-meter solar street lights is very welcome in the construction of new rural road lighting. Sometimes our common people just use what size of light source is suitable for the 6m solar street light. I have received many inquiries from the common people before. They came up and asked me how much is the 6m, 200 watt solar street light? How much is the 6-meter 100-watt solar street light? How much is the 6-meter 80-watt solar street light? How much is the 6-meter 60-watt solar street light? Waiting for these questions, my understanding may be that people do not know very much about solar street lights, nor do they know much about LED light sources. There may be a wrong understanding that compares the power of the LED light source with the power of the incandescent lamp used at home. According to our manufacturer’s experience, a 1 watt LED light source is equivalent to the brightness of a 15 watt incandescent lamp. So I think everyone should have a comparison. Therefore, it is not recommended to use this large power for 6-meter solar street lights. One is that the lighting requirements are not necessarily so high, and the other is the cost of solar street lights. When the lighting time is constant, the greater the wattage of the light source, the higher the cost. So I suggest using 30-watt light source for rural 6-meter solar street lights, and 6-meter 40-watt solar street lights for urban roads.
As for the installation spacing of solar street lights, our light source is through secondary light distribution, and the light becomes a rectangular spot. The ratio of the height of the light source from the ground to the lighting range of the light source is 1:5.4, and the height of the 6-meter solar street light source is usually 5.5 meters from the ground. That is to say, the lighting range of the 6-meter solar street light is 29.7 meters, so the installation distance is guaranteed to be within 30 meters, which can ensure that there is no dark area between the two lights. Normally, in order to control the cost of our rural roads, we would recommend installing solar street lights with an interval of 35 meters to 40 meters. There are more motor vehicles on urban roads, so a distance of 30 meters is guaranteed.