How much do You Know about Solar Panels?
The solar panel is a device that converts light energy into electricity. It is generally used in photovoltaic power stations and power stations with inconvenient power supply; For example solar street lights, courtyard lighting, solar signal lights, outdoor meteorological monitoring, geological monitoring, reservoir water conservancy monitoring, small base stations, etc.
Classification of foldable solar panels
At present, silicon solar cells are mainly used in foldable solar panels, which occupy a dominant position in applications.
Silicon solar cell
Silicon solar cells are composed of a large area PN junction made of silicon semiconductor materials through series and parallel connections. A metal grid line is made on the n-type material layer as the contact electrode, and a metal film is also made on the back as the contact electrode, thus forming a DC5521 solar panel. In order to reduce the emission loss of light, the surface is generally covered with an antireflection film. Mainly monocrystalline silicon solar cells, polycrystalline silicon solar cells, and amorphous silicon solar cells.
Monocrystalline silicon solar cell
Monocrystalline silicon solar cells have the highest conversion efficiency. The highest experimental conversion efficiency is 25%, and the actual conversion efficiency is about 18%. The service life is 15-25 years, and the cost is high. It still plays a leading role in large-scale applications and industrial production.
Polysilicon solar cell
The conversion efficiency of polysilicon solar cells is slightly lower. The highest conversion efficiency in the experiment is 20%, and the actual conversion efficiency is about 15%. The service life is lower than that of monocrystalline silicon and the cost is low. At present, many photovoltaic manufacturers have produced polysilicon in large quantities.
Amorphous silicon solar cell
Amorphous silicon solar cells have low cost and good weak light effect, but the conversion efficiency is low less than 10%, the service life is short, and the stability is poor. Materials are easy to cause a photoelectric efficiency degradation effect, which affects their actual use.
Use of foldable solar panels
Generally, DC5521 solar panels are not used alone. They need to be equipped with photovoltaic controllers and batteries to form a set of solar power supplies.
The solar panel is the core part of the solar photovoltaic power generation system. It usually adopts monocrystalline silicon or polycrystalline silicon panel to convert solar energy into electric energy. Monocrystalline silicon battery is the most commonly used battery due to its long service life (generally up to 20 years) and high photoelectric conversion efficiency.
The photovoltaic controller is mainly used to protect the battery, and has the functions of overcharge and discharge protection, electric energy output control, charging trickle protection, temperature compensation, and lightning protection. When the fast-fold solar panel charges the battery, if the battery voltage reaches the peak and continues to charge at high voltage, it is easy to cause battery damage; However, if charging is stopped at this time, the battery cannot be saturated; Therefore, the controller will immediately reduce the voltage after charging to the peak voltage, and then enter the trickle charging state, ensuring that the battery can be stable in the full state; Effectively protect the battery and make it last longer.
The battery stores the electric energy converted by fast-fold solar panels, usually lithium batteries or lead-acid batteries. Since the electricity generated by the solar cell is DC, an inverter (DC to AC) needs to be installed if power is provided to household appliances.
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