Irrespective of the cell and module technology, G1 wafer size based products was the most widely available module configuration, at least when we published TaiyangNews Bifacial Solar 2021 – Part 1: Cells and Modules report earlier this year. And it may not be that different even now. TaiyangNews report listed data of 22 modules based on G1, with Hevel’s HJT module using 157.35 mm wafer size also being listed here. This group includes 5 n-type products, of which two are HJT modules from Suntech and Risen. While Suntech said its product is supplied in 72-cell configuration with a very high power rating of 450 W, (especially when taking into account that the cells are purchased externally,) Risen is supplying a 60-cell format with a power rating of 355 W and an efficiency of 21%. While two TOPCon modules are listed from Jolywood, India’s Adani is the only supplier of an n-PERT cell based solar panel that reaches a power rating of 380 W. The p-PERC modules listed here are mainly different in terms of the number of cells integrated into the modules, which are 60, 72 and 78, with the latter being only offered by JA Solar with a power of 450 W. The 9 modules listed in the 72-cell category come with power ratings ranging from 420 W to 390 W, whereas the power distribution range among the 60-cell modules is between 350 W to 325 W.
The G1 based products are the only segment that still includes “bifacial only” modules, in other words traditional products that don’t include any other advanced features, such as half cells or MBB. Out of the 22 listed products, 5 are purely bifacial. The PERT module from Adani falls into this category. Another unique product in terms of technology is an HJT module from Russia’s Hevel, which employs electrically conductive adhesives (ECA) for interconnection. As with the above categories, most G1 bifacial modules now employ half cells and MBB. In addition to Jolywood, Talesun is also offering bifacial modules using transparent backsheet as rear cover for each two models, which means 18 products are glass-glass modules. The highest bifaciality is obviously associated with n-type products. While Suntech promotes a bifaciality ranging between 80% to 90%, Hevel rates its product at a fixed level of 87%. Adani’s n-PERT module is also among the bifaciality leaders with a claimed level of 82 +/- 5%. The PERC products listed here are said to have the same average bifaciality level of 70%.
The text is an excerpt from the TaiyangNews Bifacial Solar 2021 – Part 1: Cells and Modules report. For more details on bifacial modules in different wafer sizes perspective, please download the report, here.
TaiyangNews’ Bifacial Solar Conference 2021 Videos are available on YouTube; to view the event recordings click here.