Large size wafer into diversification trend VS standardization 'battle'

Solar photovoltaic (pv) net news: standing on the parity of tuyere, industry of each link is spare no effort to strive to improve the efficiency of the component. In addition to continuously explore efficient PERC, double-sided, imbricate, such as high efficient battery components technology, by increasing the size of the silicon wafer and the component as a kind of power to improve a gear & other Edge type & throughout; Form of innovation, has become one of research directions in various photovoltaic enterprise.

can be seen from table 1, with the increase of size of silicon wafer, the corresponding components turn also increase power and power gear, in 156. 75 and 158. 75, 60 slices of conventional power gear components from 310 w to 320 w. Under the condition of the battery conversion efficiency is becoming increasingly difficult, increase the size of silicon wafer is undoubtedly a more cost-effective option.

in the near future, at least 158 research institutions. 75 mm silicon wafers under the usual quotation, according to witnesses photovoltaic change, in addition to the regular 156 at present. 75 mm standard size, many enterprises have begun to or plan to the mm size of production line.

from the silicon chip enterprise order can also be seen in 158. The trend of 75 mm. Some internal personnel told the photovoltaic battery factories, from the cost analysis, the current 158. Size of 75 mm silicon prices higher than conventional size silicon 0. 35 yuan, but actual cost estimates in 0. Spread within 2 yuan, under the current price, if the premium can not be passed on to the downstream, the battery will sacrifice profits, and so on the market at present. 158. 75 mm cell is regular size 3 - high price Five cents per watt.

in production line changes, some industry insiders said that if the switch is 158. 75 mm size, changes of battery production line is mainly on the jig, renovation costs between on the cost per watt is not too high, need to follow up equipment manufacturers, for a component production line also need only small changes.

　　“ Moderate silicon large size is changed a lot of good, but not without end, along with the increase of size of silicon wafer, obstacles will also be more and more & throughout; Think, evolution fund governance rain, wafer size increases to 158. The technical renovation cost of 75 mm in the enterprise in the acceptable range, but when the wafer size is more than 161. 7 mm, for the old battery factory will lose economic significance of technical renovation, and for 166. This kind of large size 7 mm wafer requires customized equipment. In 158. Size 75 mm silicon wafers is invariant to component weight, battery terminal accept degree is high, can effectively improve power, reduce the production cost, and many other advantages, is likely to become the next generation of standard size.

and numerous viewpoints from the current enterprise production line the mm size of silicon wafer is able to not increase too much cost under the premise of effectively improving the power of the battery components, bring value was significantly larger than that of cost, also got the favour of many battery components manufacturers. Another view, 166. 7 mm components within the scope of the installation permits, also can be obtained with 158. Components of the same high ratio of 75 mm size.

in fact, on the basis of conventional silicon chip size, the industry is also trying different wafer size. In addition to 156 now. 75 mm and the rapid development of 158. Size of 75 mm silicon wafers, industry still exist in 157. 25, 157. 4, 157. In 75, 161. 7 and 166. 7 a variety of sizes, such as companies try to use & other Try water & throughout; Way to find the optimum size,

the appropriate technical innovation can promote the development of the industry, for the old factory, technical renovation costs within the acceptable range of technology upgrade can bring better benefits for the enterprise, for the new factory, in order to prevent the risk of facing elimination after production line construction, need to choose the future mainstream technology solutions. In the face of so many specifications of the silicon chip size, industry is still waiting for an optimal choice.

some enterprise, said an official with the relevant technology at present the company have the ability to meet the demand of market of all kinds of size and capacity can be switch according to requirements. But judging from the long-term development of the industry, the size of the silicon wafer diversification, there are two disadvantages, one is single size battery components limited capacity, diversification of silicon wafer size is meet the demand for end users, but also increase the owner's concern, from the point of the current policy, both parities projects or subsidies, need to be made within the prescribed time grid, enterprise fight alone, introduced different wafer size can within the time prescribed by the owner, deliver on time? If a single enterprise capacity is insufficient, the owner whether there is still room for choose other enterprise purchase? Second, the increase of the cost, complex and not unified specifications model increased the enterprise the cost of production of the plant owner and the design of the cost.

but there is also a view that size standardization is not conducive to technological innovation. Compared with the industry, said will blindly size unification, more need to be established in the same size on the corresponding specification and standard, and should not be too much constraint type size, different size is conducive to the development of technological progress, also can provide more choices for downstream customers.

the traditional silicon wafer size 156. 75 mm is driven by silicon enterprises to form, and the different sizes of attempt is conducted by component enterprises demand bottom-up conduction, natural corresponds to different requirements form different wafer size. Photovoltaic (pv) have learned, at present the size of silicon wafer standardization work has yet to start. China pv industry association, said an official with the standard work also not large size wafer related standard project plan, if the enterprise put forward the relevant standards, during will further to carry out the project work.