1. Selection of construction site
Inspect the construction site and surrounding environment to ensure the feasibility of project implementation.
There shall be no shelter around the installation site to ensure the normal daylighting of solar panels. If it is difficult to ensure that there is no shelter all day, try to ensure that there is no shelter between 9:00 a.m. and 15:00 p.m.
Household photovoltaic system generally includes ① solar panel, ② lightning protection box, ③ cable, ④ grid-connected inverter, ⑤ metering instrument. But for the general public, how to build a suitable distributed photovoltaic grid-connected power generation system?
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.