What are the components of solar street lights?

The solar panel is the core part of the solar street lamp and the most valuable part of the solar street lamp. Its role is to convert the sun's radiation capacity into electrical energy or send it to a storage battery for storage. Among the many solar cells, there are three types of monocrystalline silicon solar cells, polycrystalline silicon solar cells, and amorphous silicon solar cells, which are more common and practical. In the east and west regions where the sunlight is sufficient, it is better to use polycrystalline silicon solar cells, because the production process of polycrystalline silicon solar cells is relatively simple and the price is lower than that of single crystals. In the southern region where there are many rainy days and the sunshine is not very sufficient, it is better to use monocrystalline silicon solar cells because the performance parameters of monocrystalline silicon solar cells are relatively stable. Amorphous silicon solar cells are better when there is insufficient outdoor sunlight because amorphous silicon solar cells have lower requirements for sunlight conditions.

Since the input energy of the solar photovoltaic power generation system is extremely unstable, it is generally necessary to configure a battery system to work. Generally, there are lead-acid batteries, Ni-Cd batteries, and Ni-H batteries. The selection of battery capacity generally follows the following principles: first of all, under the premise of satisfying night lighting, the energy of solar cell modules during the day should be stored as much as possible, and at the same time, it should be able to store the electrical energy that meets the needs of continuous rainy night lighting at night. The battery capacity is too small to meet the needs of night lighting. The battery is too large. On the one hand, the battery is always in a state of power loss, affecting the battery life and causing waste. The accumulator should be matched with the solar cell and electricity load (street light). A simple method can be used to determine the relationship between them. The solar cell power must be more than 4 times higher than the load power for the system to work properly. The voltage of the solar cell must exceed the working voltage of the battery by 20 ~ 30% in order to ensure that the battery is normally negatively charged. The battery capacity must be more than 6 times higher than the daily load consumption.