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3Wire Wattcheck | IoT Energy Meter 1P/3P

3Wire WattCheck Power Meter

Smart Energy Monitoring Without Rewiring

Clip on. Connect online. Monitor anywhere.

3Wire WattCheck is a compact smart power meter designed to sit directly on top of existing MCBs or MCCBs, turning electrical panels into smart energy monitoring points with very low installation friction.

No DIN rail space required. No major cable modification. No complicated rewiring. WattCheck makes circuit-level energy monitoring faster, easier and more practical for new and retrofit installations.

Built-in Wi-Fi Tuya App Smart Life App No DIN Rail No Rewiring 1P & 3P Options ±1% Accuracy Bi-Directional Metering

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Why WattCheck?

Many facilities only monitor electricity at the main incomer level. This gives a total energy number, but not circuit-level visibility by area, tenant, equipment or load type.

Conventional sub-metering may require DIN rail space, wiring changes, shutdown planning and higher installation cost.

WattCheck helps close this gap by making circuit-level energy visibility easier to install, easier to connect and easier to monitor online.

Existing MCB circuits
MCCB feeders
Sub-distribution boards
Tenant loads
Office areas
Retail outlets
Air-conditioning loads
Lighting circuits
Selected machines or panels

Key Features

MCB

Easy MCB / MCCB Mounting

Clips directly onto compatible protection or control devices and can be mounted on the top or bottom where suitable.

DIN

No DIN Rail Required

Does not occupy DIN rail space, making it easier to install in panels where space is already limited.

APP

Tuya / Smart Life App

Monitor energy data remotely through Tuya and Smart Life apps without complex software setup.

WiFi

Built-In Wi-Fi

Enables online monitoring and remote access for distributed sites, offices, shops and facilities.

kWh

Real-Time Monitoring

Measure voltage, current, power and energy in real time to understand circuit-level consumption behaviour.

ALM

Fault Notifications

Supports fault notifications and alarms to help users detect issues early and respond faster.

Monitor Energy Usage in Real Time, Wherever You Are

WattCheck integrates with the Tuya App and Smart Life App, allowing users to access data, monitor electrical parameters and manage energy usage remotely.

Remote Monitoring

View energy consumption, voltage, current and power from anywhere.

Real-Time Charts

Analyse usage trends and operating behaviour through app-based visibility.

Notifications and Automation

Receive fault notifications and support simple scene automation actions.

Model Variants

WattCheck is available for single-phase and three-phase systems, including direct-mount and split CT options.

Model Type	Description	Current Rating	Typical Use
1P Single Phase	Direct mount for MCBs	Up to 63A	Single-phase circuits, small loads, office or retail circuits
3P Three Phase	Direct mount for 3-phase MCBs	Up to 63A	Three-phase sub-circuits and equipment monitoring
3P with Split CT	MCCB mount using split-core CTs	Up to 200A	Larger feeders, MCCB circuits and retrofit applications

Applications and Benefits

Smart Homes

Monitor selected home circuits, air-conditioning loads, lighting circuits and high-usage electrical points.

Smart Buildings

Improve circuit-level energy visibility for offices, commercial spaces, common areas and selected loads.

Retail and Branch Sites

Suitable for shops, clinics, branches, outlets and small facilities needing fast energy visibility.

Energy Efficiency Projects

Collect practical energy data before and after improvement actions.

Lower Installation Friction

Reduces wiring work, panel modification and installation complexity in suitable applications.

Better Circuit Visibility

Understand usage at a practical circuit level instead of relying only on main incomer readings.

Remote Access

Use the Tuya or Smart Life app to monitor energy usage anytime and anywhere.

Retrofit Friendly

Ideal for existing panels where conventional sub-metering is difficult or costly.

Part of the 3Wire Ecosystem

3Wire WattCheck is part of Saturn Pyro’s growing ecosystem of IIoT-enabled solutions, designed to help users manage energy smarter, reduce waste and support sustainability goals with plug-and-play simplicity.

For sites requiring advanced energy analytics, WattCheck can support wider digital energy monitoring strategies together with IoTWatt 4.0, selected gateways and other metering solutions.

WattCheck Product Visual

The following visual supports the WattCheck smart power meter, MCB / MCCB mounting and retrofit-friendly energy monitoring information above.

3Wire WattCheck Smart Power Meter

Product Summary

The 3Wire WattCheck Power Meter is a compact, Wi-Fi enabled smart power meter that clips directly onto existing MCBs or MCCBs for fast, practical and cost-effective energy monitoring.

With Tuya / Smart Life app integration, real-time monitoring, ±1% accuracy, single-phase and three-phase options, and retrofit-friendly installation, WattCheck makes circuit-level energy intelligence easier to deploy.

WattCheck — Smart Energy Insight at Your Fingertips.

Contact 3Wire / Saturn Pyro for WattCheck model selection, installation support and energy monitoring applications.