Test methods for short circuit current and open circuit voltage of solar cell modules:
1. Open circuit voltage: Use the red and black pens of a multimeter to touch the positive and negative electrodes. of the solar panel respectively to measure the open circuit voltage. Remember that the meter must be placed in the DC 50 V range.
2. Short circuit current: Divide the power of your solar panel by the open circuit voltage you measured to get the short circuit current value.
Types of solar cell modules:
(1) Monocrystalline silicon solar cells The photoelectric conversion efficiency of monocrystalline silicon solar cells is about 17%, the highest high reaching 24%. Among all types of solar cells, the photoelectric conversion efficiency is the highest, but the production cost is so high that it cannotnot be widely and commonly used in large quantities. Since monocrystalline silicon is usually encapsulated in tempered glass and waterproof resin, it is strong and durable. Most manufacturers usually offer a 25-year quality guarantee.
Monocrystalline flexible solar modules: Flexible solar modules are also called flex modules. The so-called flexibility means that the panels can be bent. The bend angle can reach 30 degrees. Solar cell components (also called solar panels) are the essential part of the solar power generation system and the most important part of the solar power generation system.
(2) Polycrystalline silicon solar cells The manufacturing process of polycrystalline silicon solar cells is similar to that of monocrystalline silicon solar cells, but the conversion efficiency photThe electrical energy of polycrystalline silicon solar cells is much lower and its photoelectric conversion efficiency is about 15%. In terms of production cost, it is cheaper than monocrystalline silicon solar cells. The material is easy to manufacture, saves energy, and the overall production cost is low, so it has been widely developed. In addition, the lifespan of polycrystalline silicon solar cells is shorter than that of monocrystalline silicon solar cells. In terms of performance-price ratio, monocrystalline silicon solar cells are slightly better.
(3) Amorphous silicon solar cells Amorphous silicon solar cells are a new type of thin-film solar cells that appeared in 1976. They are completely different from monocrystalline silicon and polycrystalline silicon solar cells, and the process is greatly simplified, the cOur silicon consumption is very low and the power consumption is lower. Its main advantage is that it can produce electricity in low light conditions. However, the main problem of amorphous silicon solar cells is that the photoelectric conversion efficiency is low, the international advanced level is about 10%, and it is not stable enough. Over time, its conversion efficiency decreases.