What are the drawbacks of solar street light batteries?

What are the drawbacks of solar street light batteries?

After sales maintenance

Solar energy and other batteries are used to store and release electrical energy. They can be installed on lamp posts or buried underground. The function of the battery box is to protect underground batteries. The battery will not corrode. The working principle of a battery is that the electrical energy converted by solar photovoltaic modules is stored in the body during the day, while discharge begins at night until the controller issues a command. Manufacturers with different technical capabilities have significant differences in product quality and corresponding prices. During use, the solar street light battery will inevitably turn off or experience other malfunctions. Traditionally, we install the controller at the bottom of the lamp post for easy replacement and maintenance judgment. The installation of lithium batteries at the bottom of solar panels poses a problem. When a malfunction occurs, we must use a crane or climbing tool at the top. This will increase the cost of subsequent repairs and sales. We suggest increasing the capacity of solar panels and lithium batteries, and replacing the lithium battery controller with automatic half power function, which will prolong the rainy days of solar lithium circuit lights. Therefore, this drawback is also pseudo minor. As long as we use high-quality controllers, we can solve this problem.

The discharge voltage of lithium phosphate batteries is very stable, usually 3.2V (mainly referring to the remaining 10% capacity) in the later stage of discharge. Solar street lights are now the darling of rural lighting in the country, where temperatures vary from south to north. The voltage changes quickly, and the termination voltage is usually 2.5V. The ambient temperature, especially the discharge capacity of low-temperature lithium iron phosphate batteries, can have an impact: the discharge capacity at -20 ° C is 45% at room temperature, -65% at -10 ° C, 80% at -5 ° C when it is 0% at room temperature, and almost no change in discharge capacity from 0 ° C to 20 ° C when it is 90% at room temperature. Therefore, it is difficult to use ordinary lithium batteries in these cold places in the north. However, some lithium battery manufacturers have started producing lithium batteries suitable for low temperatures, but their costs are very high.