Storage Batteries are the main equipment of solar street lights. At present, the batteries used in solar street lights mainly include lead-acid batteries, gel batteries, ternary lithium batteries, and lithium iron phosphate batteries. So which battery is the best for solar street lights?
First, let’s take a look at the characteristics of these batteries:
1. Lead-acid batteries: The plates of lead-acid batteries are made of lead and lead oxides, and the electrolyte is an aqueous solution of sulfuric acid. Its main advantages are stable voltage and low price; the disadvantage is that the specific energy is low (that is, the electric energy stored in the battery per kilogram), so the volume is relatively large, the service life is about 300-500 deep cycles, and the daily maintenance is frequent. At present, solar street lights The industry still uses it extensively.
2. Gel battery: In fact, it is an upgraded and maintenance-free version of lead-acid batteries. It replaces sulfuric acid electrolyte with gel electrolyte, which is better than ordinary batteries in terms of safety, storage capacity, discharge performance and service life. To improve, the price is even higher than that of ternary lithium batteries. It can be used in the temperature range of -40°C to 65°C, especially with good low temperature performance, suitable for the northern alpine region. It has good seismic performance and can be used safely in various harsh environments. The service life is about twice as long as that of ordinary lead-acid batteries.
3. Ternary lithium battery: higher specific energy, small size, fast charging, and higher price. The number of deep cycles of ternary lithium battery is about 500-800 times, the life span is about 1 times longer than that of lead-acid battery, and the temperature range is -15℃-45℃. But the disadvantage is that it is not stable, and the ternary lithium battery of unqualified manufacturers may explode or catch fire when overcharged or the temperature is too high.
4. Lithium iron phosphate 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 up to 8-10 years, the stability is strong, the use temperature range is wide, and it can be used at -40℃-70℃.
To sum up, solar street lights use lithium iron phosphate batteries, of course, but the price is higher. At present, the solar street lights on the market use lithium iron phosphate batteries with very reasonable prices. This product uses lithium iron phosphate batteries with a lifespan of up to 10 years, and the price is very attractive.
