1. How Much Electricity Can One Solar Street Light Save in a Year?
As we all know, solar street lights are new energy products. They convert sunlight into electricity during the day, store it in batteries, and then automatically light up at night under the control of a controller. Such street lights can save a significant amount of electricity bills each year, but what is their specific energy-saving effect? How much electricity can one save in a year?
According to data, if a 2-kilometer road is equipped with solar street lights instead of traditional ones, it can save approximately 350,000 kWh of electricity annually. Based on an average electricity price of 0.6 yuan per kWh, this translates to a savings of at least over 200,000 yuan per year. Solar street lights typically have a service life of 10 years, so the annual electricity cost saved by each street light is quite substantial. After all, street lights are indispensable for both urban development and rural construction, and their energy-saving potential should not be underestimated.
In addition, saving 350,000 kWh of electricity per year with solar street lights on this 2-kilometer road is equivalent to indirectly reducing coal consumption by about 128 tons. It also reduces emissions by 56 tons of carbon dioxide, 33 tons of coal ash, 2 tons of sulfur dioxide, and approximately 15 tons of other dust and nitrogen oxides. This truly achieves green and environmental protection, which is the core reason for the popularity of solar street lights.
2. What Size Solar Panel Should Be Used for Solar Street Lights?
Solar street lights are efficient and energy-saving lighting tools, widely used in daily life. They mainly consist of components such as solar panels, batteries, controllers, and light sources. The size of solar panels used in solar street lights varies depending on their configuration. So, how to choose the right size for a solar panel in a solar street light?
The system configuration of a solar street light—such as the power of the light source, the power of the solar panel, and the capacity of the battery—requires strict calculation, but the process is often complex. However, there is a simpler way to determine a rough range, as follows:
- The size of the solar panel is not determined by the height of the light pole or the lighting duration, but mainly by the power of the load (i.e., the LED light). Generally, the power of the solar panel is 3-5 times that of the light source. For example, if the light source is 30 watts, the solar panel should have a power ranging from 90 watts to 150 watts.
- The specific power range can be adjusted according to sunlight conditions:
- In areas with sufficient sunlight (such as Inner Mongolia and northwestern regions of China): The solar panel power is within 3 times that of the light source.
- In areas with poor sunlight (such as mountainous regions with frequent fog or continuous rain): The solar panel power should be about 5 times that of the light source.
- In most regions: A solar panel with power 4 times that of the light source is a suitable reference.
The above information is compiled by solar street light manufacturers. The service life of solar street lights also depends on daily maintenance: during initial installation, strict adherence to construction standards is required, and configurations should be reasonably matched to ensure battery capacity, thereby extending the lifespan of the street lights. For more information, please follow us!
