Solar Panel Role And Kind
1, the role of solar panels
The role of solar panels is the sun's light energy into electricity, the output DC into the battery. Solar panels are one of the most important components of solar power generation systems, and their conversion rates and service life are important factors in determining whether solar cells are of value.
Solar cell components can be composed of a variety of different sizes of solar cell array, also known as solar array. The power output capacity of solar panels is closely related to the size of the area. The larger the area, the greater the output power under the same lighting conditions. The advantages and disadvantages of solar panels mainly by the open circuit voltage and short circuit current to measure these two indicators. In the case of
2, the type of solar panels
(1) monocrystalline silicon solar cells
At present, monocrystalline silicon solar cell photoelectric conversion efficiency of about 15%, the highest reached 24%, which is all types of solar cells in the photoelectric conversion efficiency of the highest, but the production cost is so large that it can not be a large number of extensive And generally used. Since monocrystalline silicon is typically coated with tempered glass and waterproof resin, it is rugged and durable for up to 15 years and up to 25 years. In the case of
(2) polycrystalline silicon solar cells
Polycrystalline silicon solar cell production process and monocrystalline silicon solar cell almost, but the polysilicon solar cell photoelectric conversion efficiency will have to reduce a lot of its photoelectric conversion efficiency of about 12% (July 1, 2004 Japan Sharp market efficiency of 14.8% Of the world 's most efficient polysilicon solar cells). From the production cost, than the monocrystalline silicon solar cells to be cheaper, easy to manufacture materials, save power consumption, the total cost of production is low, so get a lot of development. In addition, the life of polysilicon solar cells than the monocrystalline silicon solar cells shorter. From the performance and price ratio, monocrystalline silicon solar cells also slightly better. In the case of
(3) amorphous silicon solar cells
Amorphous silicon solar cells in 1976 is the emergence of new thin film solar cells, and monocrystalline silicon and polycrystalline silicon solar cell production methods are completely different, greatly simplifies the process, silicon material consumption is small, lower power consumption, its main The advantage is that in low light conditions can also generate electricity. However, the main problem of amorphous silicon solar cells is the low efficiency of photoelectric conversion, the current international advanced level of about 10%, and not stable enough, with the extension of time, the conversion efficiency of attenuation.
(4) multi-compound solar cells
Multicomponent compounds Solar cells are solar cells that are not made of single element semiconductor materials. Now the variety of countries studied, most have not yet industrial production, mainly in the following categories:
a) cadmium sulfide solar cells b) gallium arsenide solar cells c) copper indium selenium solar cells.