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Since their inception, solar street lights have brought significant benefits to rural areas. One reason is the support from national policies, which alleviates financial burdens when purchasing solar street lights. Another reason is that solar street lights are energy-saving and environmentally friendly, causing no pollution and even allowing for recycling. However, some solar street lights have a short lighting duration. What causes this? The following will explain.
1. Extended Overcast Days
During overcast and rainy days, the weak light means that the solar panel cannot convert sufficient energy, leading to a situation where the charging volume is less than the discharging volume. This results in the battery being discharging insufficiently, shortening nighttime lighting duration. Typically, after a couple of sunny days, the lighting duration can return to normal.
2. Decreased Battery Storage
The decrease in battery storage is a primary factor to consider for the shortened nighttime lighting duration of solar street lights. The energy supply and storage of solar street lights rely on batteries. Nowadays, commonly used batteries include gel lead-acid batteries and lithium batteries. Gel lead-acid batteries typically last 3-5 years, while lithium batteries can last 5-8 years or more. If solar street lights reach the end of their battery life, replacing the batteries is necessary. Century Sunshine Lighting has transitioned to using only lithium batteries for its solar street lights.
3. Dirty or Damaged Solar Panels
The main function of solar panels is to convert light into electrical energy. Solar panels are often exposed to dust and dirt, especially in arid areas, which can reduce their efficiency. If dust accumulates too much, charging may fall short of discharging, leading to reduced lighting duration. In this case, cleaning the panel and charging for two days can restore the original lighting duration. If cleaning does not extend the lighting duration, the solar panel may be damaged and require replacement.
These are the reasons for the shortened lighting duration of solar street lights. Solar street lights are energy-efficient and eco-friendly, causing no impact on the environment, and they are easy to install. They can also help us save labor and material resources to a certain extent.
