Sharing the company’s TOPCon solar technology development on day 1 of the TaiyangNews High Efficiency Solar Technologies 2024 conference was JA Solar’s Technical Pre-Sales Projects Manager Djamel Eddine Mansour. JA uses its proprietary Bycium+ cell technology for its modules. Bycium+ is now in its 5th generation with BCM5.0, having reached 26.80% cell efficiency, up from 25% efficiency in 2022.
In the latest version, it deploys screen-printed silver contact on both sides of the cell. What is even more exciting, said Mansour, is that this doesn’t yet include the integration of the newest innovations at JA Solar like edge passivation or zero busbar technologies to further enhance performance.
Mansour shared that laser fire technology boosts cell efficiency by 0.2% to 0.4%, and module power by 5 W to 10 W, by improving silver paste contact. JA’s use of a non-destructive laser half-cut process followed by effective edge passivation also enhances cell efficiency by 0.19% and module power by 6 W, he added.
At the module level, Mansour said that the manufacturer addresses the CTM (cell-to-module) geometrical and optical and electrical losses by optimizing wafer sizes and cell configurations. For instance, innovations such as the M10R wafer have enhanced modular power. Half-cell passivation and zero-busbar (0BB) further enhance module power. He claimed that the 0BB increases optical gains with a 3 W to 5 W improvement.
This approach also reduces material costs and energy loss as it leads to fewer microcracks, which is due to the lower welding temperature and smaller localized stress. It also lends better environmental attributes to the module, both in terms of carbon reduction in manufacturing and at the materials end, according to him. The right polymer combination has its advantages too in terms of cell protection from moisture.
For more presentation videos and conference summaries for all 4 days of the TaiyangNews High Efficiency Solar Technologies 2024 Conference, click here for days 1 and 2, and here for days 3 and 4.