With the increasing development of modern society, solar energy applications can be seen everywhere, street lights, hot water, heating, cooking, power generation, etc. More and more people choose solar energy, which is green and low energy consumption.

Solar street lights are charged during the day and work at night. Under the sunlight exposure during the day, the light energy is converted into electricity through photovoltaic panels and stored in the battery to supply lighting at night. Therefore, it is necessary to configure batteries to ensure the normal operation of solar street lights at night.
At present, solar street lamp battery applications are mostly divided into the following types:
1, lead-acid battery: low price, suitable for low temperature high rate discharge; Seal maintenance-free; However, care should be taken to prevent the pollution of lead acid, and it is too bulky and will be phased out.
2, nickel-cadmium battery: strong, cheap, economic and durable, good low temperature performance; However, attention should be paid to prevent the pollution of cadmium metal to the environment.
3, nickel-metal hydride battery: high rate charge and discharge performance is good, no pollution, green environmental protection battery; Small system adoption, it is worth vigorously promoting.
4, lithium iron phosphate battery: high temperature performance, large capacity, high charge and discharge efficiency, light weight, environmental protection and pollution-free; But its price is expensive, the charger is also selective.
Lead-acid batteries are more commonly used in the market, and the environmental protection and pollution-free lithium batteries are the direction of future development.