The WEM3050T is a compact three-phase Wi-Fi energy meter designed for residential solar PV monitoring, home energy monitoring, and electricity cost optimization.
It is one of IAMMETER's most cost-effective choices for home solar users who want to understand:
WEM3050T supports three-phase, split-phase, and single-phase measurement scenarios. In many home solar installations, one WEM3050T can be used as multiple measurement channels for grid, inverter, or load monitoring.
For users who mainly need practical solar PV monitoring with IAMMETER-Cloud Basic service, WEM3050T is usually the recommended starting point.
Most residential solar users do not only want to see solar production. They want to know whether the system is really saving money.
WEM3050T helps answer questions such as:
With IAMMETER-Cloud, WEM3050T data can be used in solar dashboards and reports for daily, monthly, and yearly analysis.
Related solar monitoring pages:
| Feature | WEM3050T |
|---|---|
| Meter type | Three-phase Wi-Fi energy meter |
| Installation width | Compact 2P design |
| Current sensors | 3 x 150A CTs |
| Typical use | Residential solar PV and home energy monitoring |
| Grid types | Single-phase, split-phase, three-phase Wye |
| Direction | Bidirectional import/export metering |
| Cloud service | IAMMETER-Cloud Basic included |
| Local access | Local API, MQTT, Modbus/TCP |
| Integrations | Home Assistant, Node-RED, OpenHAB, ioBroker, custom systems |
WEM3050T can measure bidirectional power and energy, so it can distinguish electricity imported from the grid and surplus solar energy exported to the grid.
This is essential for solar PV users because solar production alone does not explain the electricity bill. The bill is usually affected by grid import, feed-in export, tariff rules, and self-consumption.
Learn more:
Depending on the wiring scenario, WEM3050T can monitor inverter output or work together with another IAMMETER meter to monitor both grid and solar production.
Common residential solar cases include:
For the correct wiring option, start with:
IAMMETER can calculate home consumption and self-consumption from grid and solar data.
This helps users understand whether solar energy is being used inside the home or exported to the grid. If exported energy is high and feed-in tariff is low, improving self-consumption may save more money than simply monitoring production.
IAMMETER's goal is not only monitoring. The more valuable result is helping users reduce electricity bills by using more of their own solar energy.
When WEM3050T measures real-time grid import/export, the data can also be used for solar surplus control.
For example, with the WPC3700 Wi-Fi Power Controller, IAMMETER can dynamically control a resistive load such as an electric boiler or water heater. The controller adjusts power according to available solar surplus, helping the load consume excess PV energy instead of exporting it to the grid.
This can improve solar self-consumption and shorten the payback time of the monitoring and control system.
Learn more:
WEM3050T has three measurement channels. This makes it flexible in residential solar installations.
| Scenario | Typical use of WEM3050T |
|---|---|
| Single-phase grid + single-phase inverter | Use different channels for grid and inverter monitoring |
| Split-phase home solar | Monitor split-phase grid import/export and solar-related power flow |
| Three-phase grid + single-phase inverter | Monitor three-phase grid and use another meter if inverter monitoring is also required |
| Three-phase grid + three-phase inverter | Use two WEM3050T meters when both grid and inverter need full three-phase monitoring |
The exact wiring depends on the electrical system and inverter type. Please follow the wiring guide before installation:
WEM3050T includes IAMMETER-Cloud Basic service.
This is suitable for home users who want a cost-effective way to monitor energy data without needing every advanced cloud feature.
With IAMMETER-Cloud, you can view:
For more advanced cloud features or professional projects, compare WEM3050T with WEM3080T and WEM3046T.
WEM3050T is also suitable for users who prefer local data access or smart home integration.
It supports:
This makes WEM3050T a good fit for Home Assistant users who want local energy data for dashboards, automations, and solar surplus logic.
Related pages:
| Model | Best fit | Cloud service | CT option |
|---|---|---|---|
| WEM3050T | Residential solar PV and home energy monitoring | IAMMETER-Cloud Basic | 3 x 150A CTs |
| WEM3080T | Professional three-phase or split-phase monitoring | IAMMETER-Cloud Pro | 150A / 250A / 500A options |
| WEM3046T | High-current projects with external CTs | IAMMETER-Cloud Pro | Standard 5A CT input |
For most home solar users who want a cost-effective solution, WEM3050T is usually the first model to consider.
If the project requires larger CTs, standard 5A CT input, or advanced cloud service, compare it with WEM3080T or WEM3046T.
| Specification | Description |
|---|---|
| Input voltage | 80-277VAC phase voltage, 140-480VAC line voltage |
| CT rating | 150A |
| Measurement accuracy | +/-1.0% voltage, current, power; Class 1 energy |
| Typical power consumption | ⇐2W at 230VAC input |
| Communication | Wi-Fi |
You can find available IAMMETER sales channels here:
Last updated on: Jul 03, 2026
Three Phase Wi-Fi Energy Meter (WEM3080T)
Single Phase Wi-Fi Energy Meter (WEM3080)
Three Phase Wi-Fi Energy Meter (WEM3046T)
Three Phase Wi-Fi Energy Meter (WEM3050T)
