Which places are suitable for installing distributed photovoltaic power generation systems?

1. Workshop in industrial field: especially in factories with large power consumption and expensive online purchase price, the workshop usually has a large roof area and an open and flat roof, which is suitable for the installation of photovoltaic arrays; Moreover, due to the large power load, the distributed photovoltaic grid-connected system can achieve local consumption and offset part of the online purchase power, so as to save users’ electricity charges.

Are you curious: Where does the electricity around us come from? How does electric energy come out? What are the advantages and disadvantages of each power generation method? Next, let’s introduce the mysteries of each power generation mode.

In recent years, with the large-scale construction of photovoltaic power stations, there have been varying degrees of quality and safety hazards. Safety and quality have become the number one killer of long-term stable power generation of photovoltaic power stations.

Once there is a serious accident such as an aircraft explosion or even a fire, it will not only affect the power generation but also have a very bad impact on national property and even human life.

Structure of solar junction box

Generally speaking, the solar junction box is composed of box cover, box body, wiring terminal, diode, connecting wire, and connector.

 Functions of each part

It has strong anti-aging and UV resistance. Meet the use requirements of outdoor harsh environmental conditions; The self-locking function makes the connection more convenient and firm;

The first-line solar panel manufacturers have upgraded the previous 156 166 sizes solar panel production line to 182 and 210 sizes. This upgrade has a direct impact on the rapid increase of solar panel power, of which the increase of output current is the most obvious.

The current of the latest solar panel has increased by 40% – 80% compared with the current of conventional solar panels in the past, as a result, most photovoltaic junction boxes designed in the past can not be suitable for the latest solar panels.

Nowadays, solar street lamps are more and more widely used and vigorously promoted by the country. However, subject to the development of science and technology, the technology of solar street lamps is not mature enough.

As an important part of the solar street lamp system, the solar panel is mainly used to absorb solar energy, convert light energy into electric energy, and power the whole system.

Technical characteristics of solar panels

It is designed according to the requirements of IEC: 1215:1993 standard of International Electrotechnical Commission, and the processing and production process is produced in strict accordance with the standard, which can ensure the quality, electrical performance and service life requirements of solar panels.

A solar panel is one of the most important pieces of equipment of a photovoltaic power station, and the cost accounts for about half of the grid-connected system. The technical parameters of solar panels are very important to the system design.

Among them, the parameters such as maximum output power, open-circuit voltage, short-circuit current, filling factor and conversion efficiency are the symbols to measure the performance of the solar panels.

1. If the solar panel breaks down and does not generate electricity, the controller cannot sense current, it will be considered as dark, so the light will be on during the day.

2. The positive and negative poles of the solar panel are connected reversely, and the power generated cannot be charged into the controller. The controller will also think it is dark, so the light will not be on.

3. The junction box of the solar panel is not well welded, which may lead to faulty welding, resulting in no power transmission, and the light will be on during the day.

As a supporting product of photovoltaic modules, the cost of the junction boxes is less than one-tenth of the cost of solar panels, but it is an important component to determine whether the photovoltaic modules can work normally in the end.

Because it can not only transmit the electricity generated by solar panels to external circuits but also be the “bodyguard” of photovoltaic modules. If the junction box is improperly selected, the solar panel can be burned, which will affect the performance of the whole photovoltaic system.