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Components, Inverters, Brackets, Cables, Net Boxes, Labor Costs, and other Material Purchase Costs and Recommended by Excellent Companies

Sources:本站 | Release date: 2018-03-09 | Browsing volume:
Key words:Components, Inverters, Brackets, Cables, Net Boxes, Labor Costs, and other Material Purchase Costs and Recommended by Excellent Companies

Photovoltaic modules
Photovoltaic modules are the core components of photovoltaic power plants, and their prices also account for more than 50% of the total power plant price. Currently, the price of first-tier manufacturers on the market is 270W polycrystalline PV module prices ranging from 2.68-2.75 yuan/W, while monocrystalline wafers are more than 280W. Component prices range from 2.68 to 2.80 yuan/W; CIGS components range from 4-6 yuan/W; HIT components range from 3.8-4.8 yuan/W. The average price is about 2.63 yuan/W. In addition, the specific purchase price will depend on the brand, component power, and project scale of the components. At the same time, the price of single crystal polycrystalline modules has recently been markedly downward, requiring close attention of the guys.
Manufacturers recommend: Jinko Energy, JA Solar, Hairun Solar, Longji Leye, Shandong Dahai, Suntech, CEC Solar, Hengdian Dongci, Yingfu Solar, Haitai Xineng, etc. China Photovoltaic Household Appliance PV Module Top Ten Suppliers Brand List
Trina Solar, Jinko Energy, GCL Integrated, JA Solar, Longji Leye, Hairun Solar, Luan Solar, Ruiyuan Dingtai, Tianma Photovoltaic, Xi'an Yellow River Photovoltaic, etc. Photovoltaic Photovoltaic Battery/Component Top Ten Suppliers Brand List

According to the use of inverters in photovoltaic power generation systems, they can be classified into two types: stand-alone power supply and grid connection. At present, the photovoltaic system is generally connected to the grid, and the inverter converts the direct current generated by the photovoltaic system into an alternating current and sends the power to the grid. The inverter is the key equipment for power conversion to the Internet, so the choice and purchase of the inverter has a great impact on the stable operation of the system.
At present, the distributed household photovoltaic system generally adopts string inverters, and some of them use micro-inverters. The 30-50kW string inverter is between 0.25-0.38 yuan/W and the microinverse is above 0.8 yuan/W. For the major inverter manufacturers to launch 3-8KW of household PV inverter prices around 0.6-0.8 yuan / W range. In addition, major inverter manufacturers began to use power optimizers, but due to cost issues, power optimizers are generally used in foreign projects.
Manufacturers recommend: Huawei, Guruwatt, Sunny Power, Jinlang, Goodwin, Aifu, Shouhang New Energy, Sanjing Electric, Zhaoneng Power Electronics, Qimai, etc. Photovoltaic Household Appliance PV Inverter Top Ten Suppliers Brand List
Huawei, Guruwatt, Zhongtian Xipin, Ningbo Jinlang, Goodwin, Sanjing Electric, Shouhang New Energy, Aisima New Energy, TBEA Xi'an Electric, and Invidia (all of the above companies are listed in 2017 "China Photovoltaic String PV Inverter Top Ten Suppliers Brand List)

Photovoltaic stent
Photovoltaic photovoltaic supports are special brackets designed for placing, mounting, and fixing solar panels in solar photovoltaic power generation systems. The general material is aluminum alloy (such as: Al6005-T5 surface anodizing), carbon steel and stainless steel (such as: stainless steel 304), galvanized parts (such as; Q235 hot-dip galvanized). In general, photovoltaic supports need to meet:
1), wind load, snow load requirements and seismic requirements;
2) Design arrangement and spacing need to be combined with local sunshine conditions;
3) No rusting in 10 years, no deterioration in steel properties in 20 years, and 25 years of quality requirements for structural stability.
At present, the price of PV brackets in the market ranges from 0.2-0.45 yuan/W, depending on the material and the price of the material at that time. Due to the large number of bracket manufacturers, there is no excessive recommendation.
Manufacturers recommend: Suzhou Aiken Metals, Huangshan Ruiji, Tongjing New Energy, CITIC Bo, AVIC Green Energy, and Mabeite, etc. (The above companies have all won the 2017 "China Photovoltaic" China Best PV Bracket Supplier Brand List)

Photovoltaic DC/AC cable
In the solar photovoltaic power generation system, the cables used in the low-voltage direct current transmission part have different requirements for the connection of different parts because of different use environments and technical requirements. The overall considerations are: insulation performance of cables, heat-resistant and flame-retardant performance, Engage in aging performance and wire diameter specifications. DC cables are mostly laid outdoors and need to be protected against moisture, sun, cold, and ultraviolet rays. Therefore, DC cables in distributed photovoltaic systems are generally selected for photovoltaic-certified special cables, taking into account the output current of DC connectors and photovoltaic modules. The commonly used photovoltaic DC cable is PV1-F1*4mm2. AC cables are mainly used for the AC side of the inverter to the AC combiner box or the AC power cabinet. The outdoor installation part of the AC cable needs to be protected from moisture, sun, cold, UV, and long distances. The YJV cable is generally used. For indoor installation of AC cables, fire prevention and rodent protection must be considered.
At present, the qualified photovoltaic DC cables in the market have been changed according to the cross-sectional area and purchase price, with 2.80-3.1 yuan/meter for 4.0 mm2 and 4.2-4.6 yuan/meter for 6.0 mm2. In addition, the cost of the cable is related to the design of the power station, and the optimized component arrangement can save the use of DC cables. AC load cable can be selected according to the general power cable selection requirements. In general, the cost of photovoltaic cables varies from about 0.12 to 0.25/W. If it is too much, it may be necessary to check whether the design is reasonable or whether special cables are used for special reasons.
Manufacturers recommend: TBEA, Zhongtian Technology, Hengtong, Qingdao Han Cable, Baosheng Technology, Jiangsu Yongding, etc.

Networking box
Photovoltaic grid-connected boxes are widely used in distributed photovoltaic power generation engineering systems. They are used as variable-voltage power distribution boxes that carry the output current of photovoltaic power generation and are safely sent into the public power grid system. They have the function of short-circuit protection for power supply isolation and terminal protection for lightning surges. The components connected to the inverter and the grid mainly play a protective role. In a distributed photovoltaic power plant, its cost is only about 1% of the total cost of a photovoltaic power plant, but it is the most problematic part of the power plant. Or in other words, many problems of the power station are manifested by the failure of the distribution box.
The main function of PV grid-connected boxes is to protect other high-value components of photovoltaic power plants, such as components and inverters. A power station had a problem, and the cage was the first to perceive and protect the safety of the entire power station by tripping or even destroying itself. According to the requirements of the grid box material and local configuration, the current market price is 0.07-0.12. RMB/watt varies. There are also many net cage manufacturers and they are easy to procure. There is no recommendation for manufacturers here.
Manufacturers recommend: Zhengtai, Huasheng Electric, Kezhida, Zheri Electric, People's Electric, Delixi Electric, Puzhao New Energy, etc.

Project Design
Photovoltaic project design includes photovoltaic power station design and grid connection design. The rationality of project design not only relates to the construction cost of the power station, but also determines the power generation efficiency of the power plant to a large extent. For example, whether the spacing between arrays is reasonable and whether it will cause obstructions; whether the power plant is based on the power usage of the owner, whether the power generation is optimized in winter or summer, or is optimized with the maximum annual power generation; the arrangement of components; how the cables are routed Line; grid-connected; electrical secondary access design and so on. In general, large-scale distributed projects will require design institutes to carry out project design, with design fees ranging from tens to hundreds of thousands, depending on the scale of the power station. Household distributed projects are generally designed by the EPC. In general experience, the design cost is about 0.1-0.2 yuan/W.

installation fee
Photovoltaic power plant installation costs, as the name implies, is the installation of labor costs, this cost and local wage levels, as well as the specific types of projects required to determine the complexity of the work, according to general experience, the power plant construction and installation costs about 0.4-0.7 yuan /W.
According to the preliminary statistics of the China Photovoltaic Industry Association, household photovoltaic installations have reached more than 2GW; in 2017, household installed capacity was more than three times that of 2016. The cumulative installed capacity of Zhejiang, Shandong, and Chongqing exceeded 100,000, with 500,000 households nationwide, and the installed capacity exceeded 2GW.
Shi Dingyi, former counselor of the State Council and former chairman of the China Renewable Energy Society, once stated that the conversion efficiency of household photovoltaics has been continuously improved, the cost has been declining, and more people’s installation enthusiasm has been mobilized, which has stimulated the vitality of the photovoltaic market. In the future, there will be room for further exploration of the household photovoltaic market in China. Many new villages, new towns, villas, factories and factories should be used on the roof, so that household systems can be better developed through distributed energy, micro-grid energy and so on.
Next, as the market continues to expand, it is imperative to accelerate the development of standard research in the field of distributed photovoltaics for household use. The China Standardization Technical Committee of the Photovoltaic Industry Association will successively formulate relevant project approval and technical standards on roof conditions, data collection, data transmission, operation and maintenance, and installation appearance requirements to regulate the orderly and healthy development of the photovoltaic market.

Of course, the largest group of households influencing the household market, photovoltaic brands will also be deployed with the increasing demand of the family photovoltaic market. Whether it is photovoltaic modules, inverters or support companies, the urgent increase in the demand for household photovoltaic market has led to many photovoltaic brands. Enterprises have laid out their layouts. Whether they are photovoltaic modules, inverters or support companies, they will be guided by favorable policies and good returns. Expanding their own market share will also provide better services for the entire household PV market. The 2018 household PV market is still promising!

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