Three Phase 380V Tuya WiFi Bi-directional Power Meter

High‑Precision, WiFi‑Enabled Bi‑Directional Power Meter for 380 V Three‑Phase Systems

Designed for commercial and industrial environments, this Tuya‑compatible power meter delivers real‑time, bi‑directional monitoring of 380 V three‑phase power distribution. Using a low‑loss current transformer (CT) network and high‑accuracy voltage sensing, it measures active, reactive, and apparent power with minimal error, even during transient events. Integrated WiFi and MQTT enable seamless communication with Tuya Smart Cloud, local dashboards, or custom APIs, while a rugged metal case and IEC‑rated plug‑in terminals provide reliable installation in typical industrial panels.

Key features include 1 % accuracy at 10 % load, ±0.2 % frequency tolerance, and a non‑intrusive 10‑stage load‑sharing algorithm that balances phase currents and fixes phase‑sequence detection. The meter reports energy consumption to the nearest 0.01 kWh and supports bi‑directional uploads of excess generation data, making it ideal for combined consumption‑production monitoring in modern energy‑management systems.

• Accuracy: Class C (±1 % at 10 % load, ±3 % at full scale)
• Measurement Range: 0 – 10 kW per phase, 0 – 30 kW total, 0 – 400 V, ±50 Hz
• Connectivity: IEEE 802.11b/g/n (2.4 GHz), Tuya Cloud, MQTT, REST API, and local dashboard via web browser
• Common Use Case: Real‑time monitoring and billing of factory motor loads, HVAC systems, and combined solar‑grid exchange in commercial buildings