1. Solar panels convert solar energy into electricity. Generally divided into three types of monocrystalline silicon, polycrystalline silicon and amorphous silicon solar panels: Among them, the performance parameters of monocrystalline silicon solar panels are relatively stable, suitable for use in southern regions with more rainy days and relatively less sunlight; relatively In terms of production technology, polycrystalline silicon solar energy is relatively simple, and the price is lower than that of monocrystalline silicon. It is suitable for use in eastern and western regions with sufficient sunlight and good sunlight; while amorphous silicon solar panels have relatively low requirements for solar conditions and are suitable for outdoor lack of sunlight. To use in some places, but to choose according to the actual installation area and budget requirements;
2. The required working voltage. The working voltage of the solar panel is about 1.5 times of the battery voltage, so that the battery can be charged normally. For example, to charge a 6V battery requires an 8-9V solar panel; to charge a 12V battery requires an 15-18V solar panel, etc., and so on, select the matching working voltage;
3. The output power per unit area of the solar panel is about 127WP / m2. The solar panel is generally composed of multiple solar cells in series. Its capacity depends on the total power consumed by the lighting source, line transmission components, and local solar radiation. The output power of the battery module should be more than 3 to 5 times the power of the light source;
4. The average peak sunlight time. The output power of solar panels is the standard solar light condition. At different times and in different locations, the output power of the same solar panel is different. The so-called standard conditions are close to the usual sunny noon. Before and after the sun's lighting conditions.