LONGi’s HPBC 2.0 based modules, Hi-MO 9 and Hi-MO X10, have passed TÜV SÜD’s PID-p (Potential Induced Degradation-Polarization) testing in accordance with PPP 58234A:2025 and IEC TS 62804-1 Ed2 (DTS) standards, LONGi becoming the first company to be awarded the PID-p certificate.
PID-p presents a major challenge for the PV industry and is a phenomenon occurring when the electric field generated by system voltage causes charge accumulation in the passivation layer of silicon solar cells, leading to power degradation. Compared to traditional PID-s (Potential Induced Shunting), PID-p progresses faster, but allows performance recovery through light exposure – particularly ultraviolet radiation. This mechanism has attracted the attention of a number of international authorities, including IEC and NREL.
