Chinese-made monocrystalline silicon panels are expected to have extremely long lifetimes (25+ years with no degradation) relative to thin film types (Cd-Te, etc.) However, another main issue is quality encapsulation of the panels; if done shoddily this greatly shortens the lifetime of the panels. Practically, look for manufacturers who have the longest guarantees.

https://solaranalytica.com/solar-panel-encapsulation/