Solar photovoltaic modules (also called solar panels) are the core part of the solar power system, and they are also the most important part of the solar power system. Its role is to convert solar energy into electricity, or send it to a battery for storage, or push the load to work.Solar photovoltaic modulesclass

1. Monocrystalline silicon solar cells

The photoelectric conversion efficiency of monocrystalline silicon solar cells is about 15%, and the highest is 24%, which is the highest photoelectric conversion efficiency among all kinds of solar cells, but the production cost is very large, so that it can not be widely and widely used in large quantities. Since monocrystalline silicon is generally encapsulated with tempered glass and waterproof resin, it is robust and durable, with a service life of up to 15 years and up to 25 years.

2. Polycrystalline silicon solar cells

The manufacturing process of polycrystalline silicon solar cells is similar to that of monocrystalline silicon solar cells, but the photoelectric conversion efficiency of polycrystalline silicon solar cells is much lower, and its photoelectric conversion efficiency is about 12% (on July 1, 2004, Japan's Sharp launched the world's highest efficiency polycrystalline silicon solar cells with an efficiency of 14.8%). In terms of production cost, it is cheaper than monocrystalline silicon solar cells, and the materials are easy to manufacture, save electricity consumption, and the total production cost is low, so it has been developed a lot. In addition, polycrystalline silicon solar cells also have a shorter lifespan than monocrystalline silicon solar cells. In terms of performance-to-price ratio, monocrystalline silicon solar cells are slightly better.

3. Amorphous silicon solar cells

Amorphous silicon solar cell is a new type of thin-film solar cell that appeared in 1976, it is completely different from the manufacturing method of monocrystalline silicon and polycrystalline silicon solar cell, the process is greatly simplified, the silicon material consumption is very small, the power consumption is lower, and its main advantage is that it can generate 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, and its conversion efficiency decays with the extension of time.

4. Multi-compound solar cells

Multi-compound solar cells refer to solar cells that are not made of a single element of semiconductor material. There are many varieties studied in various countries, most of which have not yet been industrially produced, mainly as follows:

a) Cadmium sulfide solar cells

b) Gallium arsenide solar cells

c) Copper indium selenium solar cells (novel multi-bandgap gradient Cu(In, Ga)Se2 thin-film solar cells