Analysis of the current situation of domestic use of solar street lights (2)

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　　2. Batteries: Lead-acid batteries from regular manufacturers can be guaranteed for 2 years. However, the installation of the battery has a certain particularity. The temperature of the installation site should be around 25℃ and kept as constant as possible. It should be ventilated. At the same time, rain water must be prevented and the battery must not be soaked. Ignore. Before installing solar street lights, our company must provide customers with the foundation drawings of light poles and battery pits. The customer or a third party entrusted by the customer must strictly follow the drawings to prevent errors in the construction during installation and affect the later period. The normal operation of solar street lights. In order to save costs, some manufacturers install the battery in the light pole or wait for it to catch up. The temperature is greatly affected by the climate, which will cause certain damage to the battery and reduce the service life.

3. LED street light source: Among all electrical components, the cost of the light source is relatively low, but it is also very tricky once it fails. The LED light source is installed on the top of the light pole, which brings great inconvenience to maintenance. Therefore, in production, the quality of LED street lights must be strictly controlled. In order to avoid the power loss caused by the inverter, the DC input is adopted, and its design and production are very professional, involving the heat dissipation treatment of the LED lamp beads, the light distribution treatment, the conversion rate of the constant current source, and the selection of the lamp housing and many more. The protection level is generally above IP65. If the protection level is not enough, water, dust and insects are likely to enter the lamp, which will damage the light source and battery. Some manufacturers often use low-cost methods for sales, and the products may malfunction or even be damaged in a short time, which has a great negative impact on the application of solar street lights.

4. Solar charge and discharge controller: The role of the solar charge and discharge controller in the whole set of solar street lamp lighting system is very important. Some controllers have insufficient control and protection functions for battery charging and discharging, which will cause damage to the battery due to over-discharge and over-charge lamps. The controller should protect the battery from overcharging and over-discharging; the controller switches the input of the photovoltaic policy in PWM pulse mode. When the battery tends to be full, the pulse frequency and events are shortened. This charging method can increase the charging efficiency of the system and extend the service life of the battery. The controller should be installed in a humid environment as much as possible, and should not be installed in a bare environment. At the same time, it should have the function of temperature compensation and a certain degree of waterproofing. If the environment is humid, it will not cause damage to the controller. In response to this situation, the waterproof controller used by our company has a protection level of IP67.

To be continued...