Overview

IAMMETER WEM3050T is a compact Wi-Fi energy meter aimed at buyers who want three-phase or split-phase monitoring at a lower entry price than IAMMETER's more premium models. It is designed for home energy monitoring, solar import/export tracking, and electricity-cost analysis, while still leaving room for Home Assistant, MQTT, and custom integration workflows.

Core features

  • Supports three-phase 4-wire WYE, split-phase, and single-phase monitoring scenarios.
  • Performs bidirectional metering for import and export energy, which makes it useful for solar self-consumption and net-metering style analysis.
  • Includes built-in Wi-Fi plus local interfaces such as HTTP APIs, MQTT, and Modbus TCP.
  • Ships with three 150A split-core CTs for standard whole-home or solar-related monitoring jobs.
  • Uses a compact 2P DIN-rail format that is easier to fit into many switchboards than larger 4P-style meters.

Installation and measurement fit

The WEM3050T is a CT-based meter rather than a direct-connected revenue meter. That matters for comparisons: it is better suited to energy visibility, automation, and solar monitoring than to formal utility billing roles. IAMMETER's current official materials describe it as a 3-phase 4-wire meter that also works in split-phase and single-phase setups, with included 150A split-core CTs and DIN-rail mounting.

Connectivity and integration

A major reason this model stands out is that it does not force users into a cloud-only workflow. IAMMETER's official product, quickstart, and cloud-registration materials all point to local setup and third-party integration options alongside IAMMETER-Cloud Basic. The reviewed source set supports local API access, MQTT, Modbus TCP, web-based configuration, Home Assistant compatibility, and the option to upload data to your own server.

Cloud and local use

IAMMETER positions WEM3050T as the lower-cost member of its three-phase line and pairs it with IAMMETER-Cloud Basic rather than lifetime Pro. That means cloud use is available and normal for many buyers, but the device can still be used in local-first or self-hosted workflows if you prefer to avoid depending on the vendor cloud for day-to-day operation.

Best fit

This meter is a strong fit for:

  • households with three-phase or split-phase service,
  • solar users who want to track grid import and export,
  • buyers who care about Home Assistant or MQTT compatibility,
  • and technically comfortable users who want more control over where their energy data goes.

Watch-outs

  • It is a monitoring-focused CT meter, not a utility-style billing meter.
  • IAMMETER's current protocol documentation notes that WEM3050T does not provide the RS485 interface used by the brand's Modbus RTU-capable models, so buyers who specifically need RS485 wiring should compare it against other IAMMETER three-phase options.
  • IAMMETER-Cloud Basic is included, but some IAMMETER cloud features remain tied to paid or higher-tier service expectations.

Buying and source notes

The official IAMMETER store currently lists the WEM3050T-150A at $109, and IAMMETER's current global purchase guide shows official availability across multiple regions and channels, including the United States, Australia, Germany, and the brand's own store. Buyers should still check the live official listing for local shipping and platform availability before purchasing.