Q & A on PV support

1. Why should we pay attention to the importance of photovoltaic support in power generation system ?
The solar bracket is a very important part of the photovoltaic power station . It carries the main power generation body of the photovoltaic power station . If the design is unreasonable , an accident occurs in a disastrous climate , which will have a fatal impact on the power station . Therefore , in the design process , it is necessary to comprehensively consider various factors , and finally determine the support selection and array layout .
2. How to effectively extend the service life of the solar PV bracket ?
Ground PV support system common ground PV system generally adopts the form of concrete strip ( block ) foundation . Challenges faced by the solar PV support design scheme . The most important feature of the assembly components of any type of solar PV support design scheme is the weather resistance . The structure must be firm and reliable , and can withstand atmospheric erosion , wind load and other external effects . Safe and reliable installation , achieving the maximum use results with the minimum installation cost , almost maintenance free and reliable maintenance are all important factors to be considered when making a scheme selection . High wear resistant materials are used in the solution to resist wind , snow and other corrosive effects . Comprehensive use of aluminum alloy anodizing , ultra thick hot galvanizing , UV aging resistance and other technologies to ensure the service life of solar support and solar tracking .
At present, the commonly used PV support foundation forms at home and abroad are cement foundation and screw ground pile . Cement based PV support usually adopts independent foundation or strip foundation , and the fabrication method adopts prefabrication or cast - in - place . Its outstanding advantage is that it uses less steel , is basically not limited by geological conditions , has excellent anti-corrosion performance and less potential safety hazards .
3. What aspects of PV supports do customers need to focus on ?
As an emerging industry, photovoltaic supports are facing more and more customer needs . At the same time , some customers lack the knowledge of photovoltaic support installation , design , calculation and other aspects . Have to rely on the professional team of the manufacturer . Therefore , photovoltaic support manufacturers and services are concerned about team building . Only when the industry is always professional can we know more . In the face of customer demand , the PV bracket manufacturers know their products and publish the detailed parameters of the products . In fact, it is a kind of behavior to win the trust of customers . Correctly , it is not necessary to focus on the parameters when selecting non professional PV users .  We should judge and choose from the side . For example , the following aspects : erection structure, tracking moving parts, component materials, component processing technology, warranty time and effective service time. The product descriptions of photovoltaic supports in the network always habitually include parameters, installed capacity, control mode, tracking (accuracy, elevation, azimuth), safe operation capability, driving (type, electric power), protection capability, working environment, area, finishing weight, etc. It doesn't mean that the parameters are not important, but that if you can't understand many parameters, you should focus on understanding the details from the side, and then compare the parameters after a preliminary understanding . The same parameters of different fabrics and processing will also vary a lot . This is one of the reasons why the brand's products are still expensive although their parameters and performance are not high by comparison . The selection of photovoltaic supports from the perspective of non professional users is mainly considered in practical fields such as materials . For parameters , it can be said that as long as the requirements to be met are put forward , the general manufacturers will meet or explain them .
4. What are the components of the small flat PV bracket installation ?
The installation of general small plane photovoltaic supports is mainly divided into three main components , namely , triangle beam support , beam support and vertical support , whose main purpose is to form a certain angle with the irradiation surface . Other installation parts also include load - bearing parts , diagonal braces , pull rods , pressure blocks , hinges , bolts , connectors , etc .
① Triangle beam support includes longitudinal and transverse (back beam, inclined beam and low beam). Flat steel is selected as the general material .
② The beam support generally plays a compressive role. Generally, aluminum alloy C-section steel is used to select the aperture according to the application occasion .
③ The vertical support can generally be the back beam of the triangular beam frame, or it can be designed separately .
④ Other connecting structures mainly help to fix the bracket. During the installation process, the triangle beam support is connected and fixed by bolts, and then connected and fixed vertically with other beams. However, the following points should be noted .
It is necessary to add a stop component when the beam is connected with the support frame . If necessary , tie rod connection can be used in the beam , and whether to install tie rod and diagonal brace is determined according to the size of the span . If the beam is too long , it needs to be connected and fixed with connecting pieces and bolts .
5. What is the proportion of PV support in the system investment ?
According to the statistical data of Germany, in a large - scale solar power station project, the construction cost accounts for about 21 % of the total investment in photovoltaic projects, while the investment in solar photovoltaic supports accounts for only about  3 % of the total cost. Therefore, compared with the high investment of solar power station, the fluctuation of support cost is not a sensitive factor. The cost of selecting high-end supports only increases by less than 1 % . However, if the selected supports are not appropriate, the later maintenance cost will increase greatly, and it is not cost-effective to consider the whole .
6. What problems should be paid attention to in the selection of solar PV support ?
The selection of solar support materials and installation methods can only be determined through strict calculation . In addition , weather resistance is also one of the basis for selection due to the texture , climate , environment and other factors of the installation site . For example, the installation site with soft texture can be fixed with ground anchors . If the historical maximum wind speed or maximum snow volume is within a certain range , materials that can meet the requirements and have low cost can be appropriately selected. In addition, factors such as maintenance and material recovery shall be considered.
7. What problems should be paid attention to in the packaging, transportation and storage of PV supports ?
Packing notes: appropriate packing cases shall be designed and selected according to the actual size, quality, packing quantity and other parameters of the product. The parts shall be packed with plastic film or other soft materials before packing. During packing, shockproof cushioning materials shall be filled between the parts and between the parts and the packing case. The packing case shall be attached with the product manual and certificate of conformity .
Transportation note: during the transportation of PV system support , appropriate transportation tools shall be selected and necessary rain proof measures shall be taken. The packaging shall be intact during transportation , loading and unloading , and rain proof, shock absorption and impact proof measures shall be taken .
Storage note: the support shall be stored in a dry, ventilated place without corrosive substances .
8. What is the stability of PV power generation support system? Will it fail in a few years ?
It is recommended to choose brand supports . Generally , they have passed the authoritative testing and certification all over the world , passed the salt spray and ammonia corrosion tests , and have excellent corrosion resistance . The corrosion resistance period can be as long as 25 years .