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3 Phase Energy Meter Wi-Fi,split phase,bi-directional,net energy metering, Modbus TCP/RTU

Introducing WEM3050T

WEM3050T

The WEM3050T, released by IAMMETER in August 2023, is a 3-phase Wi-Fi energy meter that supports both three-phase and split-phase electrical systems. With its compact 2P design—similar to the WEM3080—the WEM3050T provides versatile and affordable energy monitoring for residential and small commercial users.

It comes with a built-in Wi-Fi module, enabling easy integration with both IAMMETER-Cloud and third-party open-source platforms. By default, each unit includes IAMMETER-Cloud Basic Service, which is free for lifetime use and sufficient for most individual or home energy monitoring applications.

"WEM3080T" vs "WEM3050T"

WEM3080T WEM3050T
Package 4P 2P
Cloud Service IAMMETER-Cloud Pro IAMMETER-Cloud Basic
Certifications UL, CE, RCM, FCC CE, FCC

Features

🔹 Measurement Features

  • Supports single-phase, three-phase, and split-phase energy measurement.
  • Measures voltage, current, active power, apparent power, and power factor for all three phases.
  • Performs bidirectional metering for both imported kWh (from grid) and exported kWh (to grid) in solar PV monitoring systems.
  • Compatible with Net Energy Metering (NEM mode).
  • Measures both Active and Reactive Power and Energy (kVAR/kVARh).
  • Offers high measurement accuracy (Class 1, compliant with IEC62053-21).

🔹 Communication & Interface Features

  • Built-in Wi-Fi for wireless data transmission.
  • Supports RESTful APIs, Modbus/TCP, MQTT, TLS, TCP, HTTP, HTTPS.
  • Real-time data accessible locally or remotely.
  • Secure HTTPS for IAMMETER-Cloud and self-hosted systems.
  • Configuration via WebUI: Wi-Fi, MQTT, Modbus, and firmware.

🔹 Integration & System Compatibility

  • Compatible with open-source platforms: Home Assistant, Node-RED, OpenHAB, ThingsBoard, ioBroker.
  • Works with IAMMETER’s self-hosting solutions: IAMMETER-Docker and IAMMETER-Central.
  • Ideal for system integrators and developers using open protocols.
  • Fully supports IAMMETER-Cloud Basic (free forever).

Electrical Specifications

Specification Description
Input Voltage 80V–277VAC (Phase Voltage), 140V–480VAC (Line Voltage)
CT Rating 150A
Measurement Accuracy Voltage: ±1.0%, Current: ±1.0%, Active Power: ±1.0%, Active Energy: Class 1 (IEC62053-21)
Typical Power Consumption ≤2W (230VAC input)

Who Is WEM3050T Designed For?

🏠 Individual Users: Homeowners Monitoring Solar PV or Energy Consumption

  • Designed for price-sensitive residential users.
  • Includes IAMMETER-Cloud Basic (free).
  • Ideal for tracking solar generation, grid import/export, and electricity bills.

🧩 System Integrators: Connecting to Custom or Third-Party Platforms

  • For energy solution providers or integrators who bypass IAMMETER-Cloud.
  • Offers open API and local HTTP/MQTT protocols.
  • Great for custom dashboards or localized systems.

🛠️ DIY Enthusiasts & Open Source Users

  • Popular among smart home hobbyists.
  • Works offline with Home Assistant, Node-RED, and OpenHAB.
  • Enables private local monitoring and full data control.

Typical Application Scenarios

  • Residential solar PV monitoring
  • Home energy management
  • Smart home automation
  • IoT and research projects
  • Developer/integrator customization

Integration Options

The WEM3050T includes the IAMMETER-Cloud Basic Service by default, which is free for lifetime and provides essential monitoring and analytics for personal users. It automatically uploads data via secure HTTPS and can be accessed via web or mobile.

For users who prefer to operate locally, WEM3050T offers open interfaces including HTTP API, MQTT, and Modbus/TCP. 👉 IAMMETER Local Interface & API Integration Guide

Self-Hosted Deployment Options

In addition to IAMMETER-Cloud, WEM3050T supports self-hosted deployment. Users can install IAMMETER’s open-source solutions, such as IAMMETER-Docker or IAMMETER-Central, to build a private energy management system on a local server (e.g., Raspberry Pi, NAS, or industrial PC).

For installation guides, visit: 👉 Integrate IAMMETER Energy Meters into Self-Hosted and Open-Source Systems

Firmware & Software Support

WEM3050T supports OTA firmware updates via its web interface. IAMMETER regularly releases updates to enhance performance, protocol compatibility, and platform integration. Users can configure Wi-Fi, MQTT, and Modbus through the local WebUI.

Reference

Summary

The WEM3050T is a compact, 3-phase Wi-Fi energy meter designed for individual users such as homeowners, solar PV owners, and energy-conscious households. It combines high accuracy with flexible connectivity, supporting both IAMMETER-Cloud Basic (free forever) and local/third-party integrations via open protocols like MQTT, HTTP, and Modbus/TCP. As an open, developer-friendly energy meter, it is ideal for solar monitoring, smart home energy management, and customized integrations.

Last updated on: October 15, 2025

Wi-Fi Energy Meter

Three Phase Wi-Fi Energy Meter

Three Phase Wi-Fi Energy Meter (WEM3080T)

  • Monitor two-way energy by one meter with bi-directional function
  • DIN-Rail mounting fits neatly in the meter box
  • Open API for integration with your own server
  • CE,FCC,UL,RoHs, RCM Complied
  • Applied in three phase or single phase (as 3 single phase meters) system, or split-phase system
Single Phase Wi-Fi Energy Meter

Single Phase Wi-Fi Energy Meter (WEM3080)

  • Monitor two-way energy by one meter with bi-directional function
  • DIN-Rail mounting fits neatly in the meter box
  • Open API for integration with your own server
  • CE, FCC, RoHs, RCM Complied
  • Applied in single phase system
Three Phase Wi-Fi Energy Meter (WEM3046T)

Three Phase Wi-Fi Energy Meter (WEM3046T)

  • Monitor two-way energy by one meter with bi-directional function
  • Support 5A input current, so you can connect your own CTs with xxx:5A ratio to this meter. Measure large current easily.
  • Open API for integration with your own server
  • CE, FCC, RoHs Complied
  • Applied in three phase or single phase (as 3 single phase meters) system, or split-phase system
Three Phase Wi-Fi Energy Meter (WEM3050T)

Three Phase Wi-Fi Energy Meter (WEM3050T)

  • Monitor two-way energy by one meter with bi-directional function
  • Small size and low price, DIN-Rail mounting fits neatly in the meter box
  • Open API for integration with your own server
  • CE, FCC, RoHs Complied
  • Applied in three phase or single phase (as 3 single phase meters) system, or split-phase system
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