Solar testing group warns of degradation risk for TOPCon
- Admin
- Apr 26, 2024
- 1 min read
Each year, Fremont, California’s Renewable Energy Test Center (RETC) releases its PV Module Index, tracking the latest trends in solar module quality, performance, reliability, and emergent technologies. The latest annual report, PV Module Index 2022, highlights the rise of TOPCon solar modules, a technology increasingly adopted by major panel suppliers. TOPCon technology utilizes n-type PV cells with passivating contacts, resulting in strong surface passivation and effective carrier transport, leading to high efficiency. The shift to TOPCon comes as p-type PERC modules approach their efficiency limits. Major companies like Longi, JinkoSolar, Jollywood, JA Solar, and Trina Solar are investing in n-type TOPCon cell designs. While n-type TOPCon modules cost slightly more to produce, the efficiency gains offer a lower levelized cost of energy in large-scale deployments. However, there are concerns about ultraviolet-induced degradation (UVID), requiring manufacturers to conduct accelerated testing to evaluate cell designs and address potential issues.
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