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The role of the solar cell panel
The role of the solar panels is to convert the sun's light energy into electricity, and store the output DC power in the battery. The 500w solar panel is one of the most important parts of the solar power system, and its conversion rates and life are the important factors determine whether the solar cell has the value. The solar modules can make a variety of different sizes of square solar cells, also known as the solar array. The power output capacity of the solar panels is closely related to its size, the larger the area, the greater the output power under the same light conditions. The main advantages and disadvantages of Solar panels are measured by these two indicators: the open-circuit voltage and short circuit current.
 The type of solar panels
First, single-crystal silicon solar cell At present, the photoelectric conversion efficiency of monocrystalline silicon solar cells is about 15%, and a maximum is 24%, which owns the highest photoelectric conversion efficiency of all kinds of solar cells, but the production costs are high, so it cannot be used widely. As the monocrystalline silicon is encapsulated in the use of silicon glass, as well as waterproof resin, so it is rugged and its life in general is up to 15 years up to 25 years.
Second, polycrystalline silicon solar cells
solar module manufacturer tells us that: The production process of polysilicon solar cell is the same with the monocrystalline silicon solar cells, while the photoelectric conversion efficiency of polycrystalline silicon solar cells will have to be reduced a lot, the photoelectric conversion efficiency is about 12% (July 1, 2004, Sharp efficiency 14.8% the world's highest efficiency silicon solar cells). In the terms of production costs, it is cheaper than the monocrystalline silicon solar cells with simple materials, saving power consumption, lower the total cost of production, and therefore obtain a large number of development. In addition, the polycrystalline silicon solar battery life is shorter than monocrystalline silicon solar cells. From the cost, monocrystalline silicon solar cell is also slightly better.
Third, amorphous silicon solar cell
Amorphous silicon solar cell is a new thin film solar cell in the 1976, its production method is completely different from the monocrystalline and polycrystalline silicon solar cells, the process is greatly simplified with very little silicon consumption, lower power consumption, and its main advantage is that it can also generate electricity in low-light conditions. But the main problems of amorphous silicon solar cells is the photoelectric conversion efficiency is low, the international advanced level of about 10%, and is not stable enough, and the conversion efficiency will obtain attenuation with time.
Fourth, Multiple compound solar cells
The multiple compound solar cells refer to the solar cells which are not made of single element semiconductor material. There are mainly the following kinds: cadmium sulfide solar cells, GaAs solar cells and copper-indium selenide solar cell.
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