admin 
Today we will discuss the protection modes of solar street lights. As we all know, the main energy source of solar street lights comes from solar energy, making them an environmentally friendly option among street lights. During the day, sunlight shines on the solar panels, converting light energy into electrical energy stored in the batteries. At night, the batteries supply power to the LED (light-emitting diode) of the street lights. Now, let’s get back to the
Solar Street Light Protection Modes
discussion.
Mode One: Direct Charging Protection Point Voltage
Direct charging, also known as fast charging, generally uses high current and relatively high voltage to charge the battery when its voltage is low. However, there is a control point, also known as the protection point. The direct charging protection point voltage is typically referred to as the “over-charge protection point” voltage. The battery terminal voltage during charging must not exceed this protection point; otherwise, overcharging may occur, which can damage the battery.
Mode Two: Equalization Charge Control Point Voltage
After direct charging ends, the battery is generally allowed to rest for a period, allowing its voltage to naturally drop. When it reaches the “recovery voltage,” it enters equalization charge mode. Equalization charging refers to balancing the charge across the cells. The equalization charging time should not be too long; generally, a few minutes to a dozen minutes is sufficient, as setting the time too long can be detrimental. For small systems equipped with one or two batteries, equalization is of limited significance. Therefore,
solar street light controllers
typically do not have an equalization mode, only having two charging stages.
Mode Three: Float Charge Control Point Voltage
After equalization charging, the battery is also allowed to rest for a while to let its terminal voltage naturally fall. When it reaches the “maintenance voltage point,” it enters float charge mode. This is similar to low-current charging, where the battery is charged slightly whenever its voltage drops, preventing the temperature from continuously rising, which is very beneficial for the battery.
Mode Four: Over-discharge Protection Termination Voltage
The battery discharge must not drop below the national standard value. Although battery manufacturers have their protection parameters, they must ultimately align with national standards. Generally, an additional 0.3V is added to the 12V battery’s over-discharge protection point voltage as a temperature compensation or control circuit zero drift correction. Thus, the over-discharge protection point voltage for a 12V battery is 11.10V, while for a 24V system, it would be 22.20V.
Bitpott –
LED Solar Street Light Manufacturer
With technology quality as our core competitiveness, if you are interested in outdoor engineering lighting or have any questions, please feel free to reach out. Bitpott is your dedicated purchasing consultant, providing one-stop comprehensive service and is sincerely here to assist you!
