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.

Residential PV, courtyard storage, and agricultural PV are driving the expansion of lightweight distributed scenarios — where traditional communication solutions often suffer from functional mismatch and high costs. Bluetooth and LoRa, with their lightweight design, low cost, and ease of operation, are becoming the communication standard for small PV devices. This article examines Bluetooth‘s convenience for short-range local operation and LoRa’s networking advantages for long-range distributed clusters, exploring how the two technologies form a complementary and collaborative lightweight communication system — offering a practical reference for communication selection in small PV scenarios.