Adding value with our service portfolio
Adding value with our service portfolio
The certification mark applies to crystalline silicon (PV) cells.
Depending on the product in question, the test procedures developed by TÜV SÜD are based on standard: IEC TS 63202-4 (Photovoltaic cells - Part 4: Measurement of light and elevated temperature induced degradation of crystalline silicon photovoltaic cells).
The voluntary certification mark with the statement “LETID Non-Sensitive” is issued for products, indicating that the product was tested and certified by the independent third-party organization of TÜV SÜD Product Service for conformity with the essential technical requirements for light and elevated temperature induced degradation (LETID) as follows:
Maximum power degradation is less than or equal to 3% in light irradiation dose accumulated to 48 kWh/m2
Regeneration occurred when light irradiation dose accumulated above 48 kWh/m2
Power stabilized after the light irradiation dose accumulated to 168 kWh/m2
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