PV Mandatory Standards Stop at the Factory Gate — Field EL Covers Post-Shipment Damage

ⓘ This article is currently published in Chinese. An English version is being prepared — read the Chinese original.

China's 2026 batch of mandatory PV standards tightens factory-level quality and nameplate truthfulness, but reliability is a whole-life-cycle issue. Transport, lifting and installation introduce hidden defects that neither visual checks nor early flash tests reveal. This article explains why field EL — especially daytime UAV EL — is the complementary tool that covers what standards cannot reach.