Reveal large size wafer and high power components of authors

Solar photovoltaic (pv) net news: flowers technology of silicon and high power components. In silicon wafer size grows, components, technical innovation environment, high power components also appear constantly. In March 2020, Orient published 500 w component products, solar energy, ja, crystal may have released the latest 500 w + product, which also design component size and the different choices of different size of silicon wafers. The large size products is how to realize the authors?

for screens parity key nodes, 2019 - 2020 flowers each link technology, such as large size wafer, large size components and efficient battery, effective component, etc. But the ultimate goal of photovoltaic technology iteration is to realize the KWH cost. To: (and reduce the degree of electricity costs 1) Reduce the unit cost of production; （ 2) Unit capacity of ascension. So we will all kinds of technology are classified as two types:

1, to reduce the unit cost of production: the large size of silicon, such as large size component technology is to reduce production costs for the purpose of technology. Is the main principle, production of major products for the scale effect, the unit cost down, reduce LOCE formula of molecules.

2, unit power generation efficiency, efficient battery, efficient component technology, etc in order to enhance the unit efficiency for the purpose of technology. Main principle is in the same area, improvement of process improvement or iterative implementation capacity, improve the denom LOCE formula.

the development of the size of silicon wafer is the process of grows. Before 2012, the size of silicon wafer mainly for margin 100 mm and 125 mm two types, greatly increased to 156 mm (after M0) 。 At the end of 2013, longji, central and other five major manufacturers led by unified standard for 156. The size of 75 mm silicon wafers. In 2018, crystal families take the lead in put out 158. 75毫米( G1) Silicon wafers, solar energy, in 2019, the longji, central respectively introduced 166 mm and 210 mm size of silicon wafers. Investigate its reason, is the wafer size grows to the downstream of many aspects, each link to bring efficiency authors.

flowers technology of silicon and high power components. In silicon wafer size grows, components, technical innovation environment, high power components also appear constantly. In March 2020, Orient published 500 w component products, ja, crystal may have released the latest 500 w + product, which also design component size and the different choices of different size of silicon wafers.

large wafers for downstream cells, components, power station link to realize synergistic authors, mainly comes from & other; Flux & throughout; And & other; Area of perimeter growth inconsistent throughout the &; The authors effect.

　　“ Flux & throughout; The authors effect is refers to the wafer after bigger capacity increased, and the corresponding equipment, manpower and other authors effect without increased. In battery, battery production line production rate to calculate, when silicon area is larger, solar portal, battery capacity increase, bring the three costs such as labor, depreciation, diluted, M12 than M2 battery can save 0. 8 yuan/W by 25. 6%. Component part, artificial depreciation of the capacity increase of diluted.

　　“ Area of perimeter growth inconsistent throughout the &; The authors effect mainly reflects on the component side and terminal stations, namely, silicon and component size bigger, borders, etc. , the corresponding increase in the amount of the weld, but the size is smaller than the area of growth, increase and thus can bring per watt cost savings. The effect is mainly embodied in the component side frame, welding zone, and the terminal station of stents, etc.

big silicon components can also bring the increase of efficiency. Due to larger wafers and cells, components in the cell spacing decreases, make the battery components area increases, thus the battery efficiency same cases, improve the power components. According to the calculation, the battery efficiency, under the condition of same M12 silicon wafers than M2 can promote 0 on the efficiency of the component. 7%.

diversity technology to find the optimal balance of total cost. Component is only part of the plant, one of the most optimal component is not the whole system, the optimal cost. Silicon chip size, the greater the photovoltaic (pv) grid and hot spots, slicing loss, lobes, bracket and inverter compatibility issues. At the same time, due to the components in the process of transportation with the method of container put two layers, excessive size of silicon wafer caused component size is too large, may cause the component change and increase the cost of transportation to put way. In addition, the compatibility of production line will also affect the penetration speed of large size silicon chips, there are the battery production line of mm, the biggest silicon wafers of silicon single crystal furnace equipment support at about 190 mm size, new production line also means greater capital investment and lower equipment effectiveness. In may this year, longji, crystal, ja, 18 XMM size product was launched China solar energy network, trying to find a better on silicon wafer size amplification balance to achieve synergistic authors.

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this paper statistics the September to today issued a total of 2. 85 gw pv power plant EPC and 1. 9 gw component bid opening information. Among them, the EPC project owner units is given priority to with soe/state, this also reflected from the side, in project bidding and parity, the state-owned enterprises have become the absolute main force. Specifically, CGNPC in development of 410 mw, 603 mw, guangzhou energy saving 220 mw, 345 mw, jin can group the people vote for 200 mw, 190 mw hubei energy group, huaneng power 180 mw