Early in June2012, when a well-known Japanese company had obtained a patent for “three-busbar electrode structure”,ZhongliTalesun, which was in the early period of Japanese market expansion, keenly aware that there would have potential patent lawsuit risk for companies who generally use “three-busbar electrode structure” technology.After prudent discussion, management team of ZhongliTalesun decided to develop “four-busbar electrode structure” PV modules. With joint efforts of all R&D colleagues, high efficiency mono/multi-crystalline four-busbar module series were successfully developed in early 2013. “The average conversion efficiency of ZhongliTalesun’smulti-crystalline four-busbar cell has reached 18%; this is no doubt a great innovation. And we have already obtained some certificates. It is a huge breakthroughas the cell adopts ‘four-busbar electrode structure.’ We haveindependent intellectualproperty rights, so it’s free from Kyocera’s ‘three-busbar electrode structure’ patent blockade,” said Dr. Ni Zhichun, Vice-president of R&D department, ZhongliTalesun. “The ‘four-busbar’ design makes transmission path of electric current more reasonable, it also reduces cell’s series resistance, and decrease busbar breaking. Four-busbar electrode structure is combined with anti-breaking finger electrode structure; this design is beneficial for cell to collect more light current, cell efficiency improved more than 0.2%, module power improved more than 0.6%”. Comparedwith normal three-busbar module, ZhongliTalesun’s four-busbar module is more efficient and stable.”
ZhongliTalesunhas showcased and promoted high efficiency mono/multi-crystalline four-busbar module series at the show of SNEC 2013, Intersolar Europe, PV Expo Tokyo, PV Expo Osaka andother global PV shows.It attracted high attention from the industry and ZhongliTalesun had successfully signed cooperation agreements and memorandums with customers from Japan, Europe and the US. And from 2013 onwards, ZhongliTalesun had already started large volume shipping regarding four-busbar modules.
“Due to the high subsidies, the Japanese PV market has become one of the world’s hottestmarkets since July 2012. The Chinese manufacturershave also expanded rapidly in Japan, with market share increased to 50% within only 6 months after July 2012. However, most Chinese PV modules are based on ‘the three-busbarelectrode structure’,” said Frank Qi, vice president of sales and marketing, ZhongliTalesun. “The well-known Japanese enterprise proposed the patent war of ‘three-busbar electrode structure’ at this time; it’s a crisis signal to most PV manufacturers. While with independent intellectual property rights, ZhongliTalesunhas already got the patent for four-busbar solar cell both in China and Japan. This makes us more reliable and trustful to clients. Guided by ‘looking to the future’ and the idea of ‘Customer First’, ZhongliTalesun is committed to cooperating with clients to gain win-win situation and contributing to the goal of ‘For A Better World Environment & Future’.”