Technical analysis of the SONOFF POWCT identifies it as a specialized 100A power monitoring relay utilizing a Split Core Current Transformer (CT) mechanism. Unlike standard inline switches, this architecture facilitates load measurement without requiring a breach of the primary circuit. The hardware is encased in a DIN-rail mountable chassis, designed for integration into electrical distribution panels.
Hardware Infrastructure and Signal Fidelity
The internal logic is driven by an ESP32 chipset, which provides increased processing headroom and accelerated pairing protocols compared to legacy ESP8266 modules. To mitigate signal attenuation common in metal electrical enclosures, the unit features an integrated SMA connector for an external antenna. Local telemetry is facilitated through a built-in LCD display, which provides real-time electrical data directly at the installation point.
Operational data confirms that while the 100A CT clamp is non-invasive, the control unit requires a dedicated 100-240V AC power source for logic board and radio operation.
Material specifications and PCB layout are proprietary to the Sonoff series, distinguishing it from generic Tuya-based clamp meters. Performance metrics indicate that standard firmware operates via the eWeLink cloud ecosystem, though the ESP32 architecture supports secondary local control firmware for reduced reporting latency.
- Operational modes: Cloud-dependent (eWeLink), Local-only (via custom firmware flash), Manual Override.
- Measurement capacity: 100A non-invasive current sensing.
- Mounting standard: 35mm DIN-rail compatibility.
The TP-Link Tapo Smart Plug Mini serves as a viable alternative for users requiring Matter-certified interoperability in a standard outlet form factor. Detailed specifications for the Tapo P125M indicate a focus on ecosystem-agnostic control rather than high-amperage panel monitoring.
This hardware unit is classified within the broader ecosystem of energy monitoring smart plugs, providing granular data for whole-home load management.
