Can Solar Street Light Charge without Sun?

solar street light work in rainy days

Solar streetlights are powered and stored by solar energy, so if there is no sun, can solar streetlights charge and work in long-term rainy weather?

Solar street light working principle description: during the day, solar street light under the control of the intelligent controller, the solar panel is irradiated by sunlight, absorbing sunlight and converting it into electricity, The solar cell module is charged during the daytime by the battery pack power supply, and at night by the battery pack for the LED light source power supply, to achieve the lighting function.

solar street light smart controller

Can solar streetlights work on rainy days?

Solar street lights are waterproof and have batteries to store energy, engineers have considered the rainy day situation when designing solar street lights. So the solar street light can work on rainy days.

If it is rainy for several days in a row, it depends on how many consecutive rainy days the configuration and technology of the street light can support.

solar street light charge with sun

solar street light charge with sun

Can the solar street light be charged on rainy days?

Solar panels can be charged on rainy days, but the amount of charging varies depending on the time of the day. Solar street lamps are equipped with battery charging and discharging devices, usually, enough sun will charge itself, and rainy days rely on battery power to maintain the street lamp power.

Solar energy in the sun’s light, charging volume. On cloudy days, the sun’s light is weakly charging volume is also relatively weak but still can be charged.

solar street light work in rainy days

solar streetlights work on rainy days

Some manufacturers say that their solar streetlights can stay on for 365 days. Is this true?

After understanding the working principle of solar streetlights, we know that the working mode of solar energy needs to follow the principle of energy conservation. Also according to the principle of energy conservation, if there are continuous rainy days for a long time because charging is less than discharging, some manufacturers promote “solar energy” The statement that “street lights are on every day, 365 days a year” is inaccurate and misleading to consumers.

Due to the different designs and quality of solar street light products, The manufacturers will increase the size of the solar panels or enlarge the battery capacity to cope with continuous rainy days. At the same time, since it can be charged on rainy days, the lights can be turned on, but the time on rainy days exceeds the set time. it can not keep the lights on all night. Therefore, if some manufacturers promote that the lights are on 365 days a day, this is unreliable.

solar street light charge

solar street light charge

Some tips to extend the use time of solar street lights on rainy days

For solar streetlights, to meet the requirements of longer continuous use on rainy days, there are three key points in the design. In terms of Accessories, additional configurations are required:

First, to improve the conversion efficiency of solar panels, on the one hand, you can choose solar panels with higher conversion efficiency per unit area, on the other hand, you can also increase the area of the solar panels, that is, increase the power of the solar panels;

Second, enlarge the battery capacity, because solar energy is an energy source that cannot provide continuous and stable power, So a power storage device must be needed to store the electricity and output it stably and sustainably.

The third point is from a technical perspective, intelligent power adjustment is achieved through technical means, intelligent judgment of recent weather conditions, and reasonable planning of discharge power.

In addition, the choice of quality is also important. The quality of battery panels, batteries, and other accessories also greatly affects their service life.

Take the battery as an example. For example, mobile phone power banks are equipped with lithium batteries. Some power banks have a large capacity,  but they cannot be fully charged within a short period. The problem is that they are equipped with batteries of poor quality. As a result, the battery decays quickly; similarly, the same is true for solar streetlights. The quality of solar panels, batteries, and other accessories has a profound impact on it.

Understanding the above points can better extend the use time of solar street lights on rainy days.