More MPPT channels do not always mean better performance. As PV plant construction becomes increasingly standardized, blindly stacking MPPT channels can fail to improve generation efficiency while introducing hidden drawbacks such as higher no-load losses, increased construction complexity, and greater operation and maintenance difficulty. This article examines the technical principles behind multi-channel MPPT and defines its clear applicability boundaries, helping practitioners move beyond parameter obsession and make refined, scenario-based selections based on actual operating conditions.