Let’s take a look at the characteristics of these batteries:

1. Lead-acid battery: The plate of the lead-acid battery is composed of lead and lead oxide, and the electrolyte is an aqueous solution of sulfuric acid. Its important advantages are stable voltage and low price; the disadvantage is that the specific energy is low (that is, the electric energy stored in each kilogram of battery), so the volume is relatively large, the service life is short about 300-500 deep cycles, and the daily maintenance is frequent. At present, solar street lights Industry is still heavily used.

2. Colloidal battery: It is actually an upgraded maintenance-free version of lead-acid battery. It replaces sulfuric acid electrolyte with colloidal electrolyte, which is better than ordinary batteries in terms of safety, storage capacity, discharge performance and service life. Improvement, some prices are even higher than ternary lithium-ion batteries. It can be used in the temperature range of -40°C – 65°C, especially in low temperature performance, suitable for northern alpine regions. It has good shock resistance and can be used safely in various harsh environments. The service life is about double that of ordinary lead-acid batteries.

3. Ternary lithium-ion battery: high specific energy, small size, fast charging, and high price. The number of deep cycles of ternary lithium-ion batteries is about 500-800 times, the life span is about twice that of lead-acid batteries, and the temperature range is -15°C-45°C. But the disadvantage is that it is not very stable, and the ternary lithium-ion batteries of unqualified manufacturers may explode or catch fire when they are overcharged or the temperature is too high.

4. Lifepo4 battery: high specific energy, small size, fast charging, long service life, good stability, and of course the highest price. The number of deep cycle charging is about 1500-2000 times, the service life is long, generally can reach 8-10 years, the stability is strong, the operating temperature range is wide, and it can be used at -40°C-70°C.

To sum up, solar street lights are of course best to use lithium iron phosphate batteries, but the price is higher. At present, solar street lights use lithium iron phosphate batteries at a very reasonable price. The usage of this product is lithium iron phosphate batteries with a life span of up to 10 years, and the price is very attractive.