How to Choose the Right Energy Meter (IAMMETER Selection Guide)

Choosing the right energy meter usually depends on several factors, including the electrical system type (single-phase, split-phase, three-phase Wye, or three-phase Delta), the application scenario (home, solar PV, commercial, or industrial), the cloud service level, and the available integration interfaces (Modbus/TCP, MQTT, RESTful API, and more).

This guide helps you quickly select the most suitable IAMMETER model for your project.

Quick Selection Guide

Choose your IAMMETER model in four simple steps.

Step 1: Identify Your Electrical System

• Single-phase grid -> WEM3080
• Single-phase home solar -> WEM2067 or WEM3050T
• Split-phase grid -> WEM2067
• Split-phase grid + solar -> WEM3050T, WEM3080T, or WEM3046T
• Three-phase Wye (4-wire) -> WEM3050T, WEM3080T, or WEM3046T
• Three-phase Delta (3-wire) -> WEM3080TD

Step 2: Identify Your Application

• Home energy monitoring / residential solar -> WEM3080, WEM2067, or WEM3050T
• Commercial / industrial energy monitoring -> WEM3080T, WEM3046T, or WEM3080TD

Step 3: Do You Need Flexible CT Options?

If you need more flexible CT selection, choose:

• WEM3046T

Step 4: Do You Need to Monitor the Secondary Output of an Existing 5A Primary CT?

If the site already uses primary CTs with a 5A secondary output, and you want to monitor the CT secondary loop directly to estimate system energy consumption, choose:

• WEM3046TE

System Types and Recommended Models

Product Comparison

Cloud service indicates the IAMMETER cloud service tier included with each meter. Basic is mainly designed for residential users and home solar applications, while Pro is intended for commercial and industrial scenarios. If a user wants to upgrade from Basic to Pro, a subscription is required. For a detailed comparison, see IAMMETER-Cloud Basic vs. Pro.

Hardware Interfaces

Besides system type and application, local communication interfaces are also important when selecting an energy meter.

All IAMMETER products support the following interfaces:

• Modbus/TCP
• MQTT / MQTTs
• HTTP / HTTPS
• TCP / TLS
• RESTful API

This makes IAMMETER suitable for both cloud-based and self-hosted energy management systems.

For more details, refer to the IAMMETER local interface and API integration guide.

Integration and Platforms

With IAMMETER-Cloud

IAMMETER provides a complete cloud and mobile app platform through IAMMETER-Cloud and App Service.

It provides:

• ready-to-use cloud monitoring
• web and mobile access
• no local deployment required

IAMMETER also provides a self-hosted local monitoring solution, IAMMETER-Docker, which can be deployed on the customer's own server.

All IAMMETER products can work directly with IAMMETER-Cloud.

Without IAMMETER-Cloud

IAMMETER energy meters can also be integrated into your own system or into third-party platforms such as:

• Home Assistant
• Node-RED
• OpenHAB
• ioBroker
• Zabbix
• ThingsBoard

To learn more, refer to How to integrate IAMMETER products into third-party platforms.

Summary

IAMMETER provides flexible energy metering solutions for:

• residential energy monitoring
• solar PV monitoring
• split-phase systems in North America
• commercial and industrial energy management
• self-hosted and third-party platform integration

Whether you need a simple home energy meter or a more advanced industrial solution, IAMMETER provides a suitable model for your application.

Feedback

Feel free to share your feedback here:

• https://imeter.club/

Update History

2026-05-12:

• Added WEM2067
• Added WEM3046TE

2026-04-04:

• Added the WEM3080TD link
• Updated the API description
• Updated the third-party integration link
• Added the WEM2067 reference