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Nowadays, both rural and urban areas are increasingly installing solar street lights. Solar street lights do not require power supply; they automatically absorb sunlight during the day to charge, converting light into electricity to emit illumination. At night, they can work for an extended period and are also quite sensitive, automatically detecting ambient brightness for adjustments to meet people’s lighting needs. Therefore, the application of solar street lights is extremely wide-ranging. However, to store the electricity generated by solar panels, solar street light batteries are needed. So, how do we calculate the configuration of solar street light batteries? Here is an introduction from the Century Sunshine Lighting editorial team.
Calculation Method for Solar Street Light Battery Configuration
1. First, calculate the current:
For example: 12V battery system;
Two 30W lamps, totaling 60 watts.
Current = 60W ÷ 12V = 5A
2. Calculate the battery capacity requirement:
For instance, the street light requires a total lighting time of 7 hours at full load each night;
(If turned on at 8:00 PM and turned off at 11:30 PM for one lamp, then turned on again at 4:30 AM with the second lamp and off at 5:30 AM), the lighting requirement must meet continuous rainy days for 5 days. (The calculation includes the previous night before the 5 rainy days, totaling 6 days.)
Battery = 5A × 7h × (5+1) days = 5A × 42h = 210AH.
Additionally, to prevent overcharging and deep discharging of the battery, it is generally charged to about 90% and discharged with a reserve of around 20%.
Therefore, 210AH is only about 70% of the actual standard in application.
The above information about how to calculate the configuration of solar street light batteries is shared here. In summary, compared to traditional public lighting devices, the advantage of solar street lights is their energy-saving and environmentally friendly nature. They primarily rely on sunlight converted into electricity to maintain illumination, significantly reducing unnecessary energy consumption.
