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

3Wire Smart Power Meter

WattCheck Smart Circuit-Level Energy Monitoring Without Rewiring

3Wire WattCheck is a compact smart power meter designed to clip directly onto compatible MCBs or MCCBs, turning existing 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 helps homes, offices, small businesses, retail outlets and facility teams monitor selected circuits faster and more practically.

Built-in Wi-Fi Tuya / Smart Life App No DIN Rail MCB / MCCB Fitting 1P and 3P Options ±1% Energy Accuracy Bi-Directional Metering

Product Type Compact smart power meter for MCB / MCCB-mounted monitoring

Monitoring Voltage, current, power, power factor and energy visibility

Connectivity Built-in Wi-Fi with Tuya and Smart Life app integration

Installation Value No DIN rail space required and minimal panel modification

Overview: From Electrical Circuit to Smart Energy Point

Many homes, offices and small facilities only monitor electricity at the main incoming supply. This gives total consumption, but it does not show which circuit, load, area, tenant or equipment is driving the energy use.

Conventional sub-metering may require DIN rail space, additional wiring, shutdown planning and higher installation cost. WattCheck is designed to reduce this barrier by fitting directly onto suitable protection or control devices and connecting through Wi-Fi to app-based monitoring.

Key positioning

WattCheck is best positioned as a retrofit-friendly smart power meter for circuit-level energy visibility in homes, offices, small businesses, retail outlets, small commercial sites and selected equipment monitoring points.

How WattCheck Turns a Circuit into Energy Data

WattCheck is designed for fast circuit-level monitoring where users need practical visibility without installing a full conventional metering system.

1. Install Mount WattCheck on compatible MCB / MCCB locations.

2. Connect Connect to Wi-Fi and pair with the supported app.

3. Monitor View voltage, current, power, energy and trends.

4. Analyse Identify high-usage circuits, abnormal loads and wasted energy.

5. Act Improve usage habits, scheduling and load management.

Key Features

MCB

MCB / MCCB Fitting

Designed to be mounted on compatible protection or control devices, making retrofit monitoring easier.

DIN

No DIN Rail Required

Does not occupy DIN rail space, which helps when existing panels are already crowded.

APP

Tuya / Smart Life App

Monitor energy data remotely using the Tuya App or Smart Life App without complex software setup.

WiFi

Built-In Wi-Fi

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

kWh

Real-Time Energy Monitoring

Measures voltage, current, power, power factor and energy to understand circuit-level consumption.

±1% Energy Accuracy

Provides practical accuracy for energy awareness, circuit comparison and small-site monitoring.

Bi-Directional Metering

Supports bi-directional energy metering for applications where import and export energy visibility is required.

ALM

Notifications and Alarms

Supports fault notifications and alarms to help users identify abnormal conditions faster.

AUTO

Scene Automation

Supports app-based scene automation for simple smart energy management use cases.

Smart App Monitoring

WattCheck integrates with Tuya and Smart Life apps, allowing users to view energy usage, voltage, current and power data from anywhere. This makes it practical for small sites, branch outlets, home offices, tenant areas and selected loads.

Remote Access

View circuit-level energy information through supported mobile apps.

Real-Time Charts

Review usage trends and identify operating patterns.

Alerts and Automation

Receive notifications and create basic scene automation actions.

Model Variants

WattCheck is available for single-phase and three-phase applications. Model selection should be based on system voltage, phase configuration, current rating, available panel space and installation arrangement.

Model Type	Description	Current Rating	Typical Use
Single-Phase WattCheck	Direct fitting for 1P+N circuits.	Up to 63A	Home circuits, office loads, small commercial loads, air-conditioning and selected appliance circuits.
Three-Phase WattCheck	Direct fitting for 3P+N circuits.	Up to 63A	Three-phase sub-circuits, small equipment feeders and selected three-phase loads.
Three-Phase Split CT Option	Monitoring arrangement using split-core CTs for larger feeders.	Up to 200A, depending on model configuration	MCCB feeders, larger sub-circuits and retrofit applications where direct fitting is not suitable.

Technical Highlights

Parameter	Single-Phase Model	Three-Phase Model
Model Reference	3W1110	3W3110
Rated Working Voltage	220-240V AC	3N~220-240 / 380-415V AC
Frequency	50 / 60Hz	50 / 60Hz
Maximum Detection Current	63A, 1P+N	63A, 3P+N
Measured Parameters	Voltage, current, power factor and energy	Voltage, current, power factor and energy
Energy Measurement Accuracy	Class 1 / within practical ±1% tolerance	Class 1 / within practical ±1% tolerance
Overvoltage Category	Category III	Category III
Rated Insulation Voltage	250V	440V
Rated Withstand Impulse Voltage	4kV	4kV
Pollution Grade	3	3
Protection Grade	IP20	IP20
Communication Mode	Wi-Fi	Wi-Fi
Installation Type	Circuit breaker fitting	Circuit breaker fitting
Aperture	9.8mm	9.8mm
Dimensions	46.8mm x 17.8mm x 21.3mm	46.8mm x 52.8mm x 21.3mm

Installation note

Product suitability must be confirmed based on breaker type, panel layout, conductor size, voltage system, available access and local electrical safety requirements before installation.

Typical Applications

Homes and Home Offices

Monitor selected circuits, air-conditioning loads, lighting circuits and high-usage appliances.

Offices and Small Businesses

Improve visibility for office areas, equipment circuits, tenant loads and small distribution boards.

Retail and Branch Sites

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

Air-Conditioning Loads

Track energy use of selected AC circuits and identify abnormal operating patterns.

Tenant and Area Monitoring

Provide practical sub-circuit visibility where full metering systems are not justified.

Energy Efficiency Projects

Collect practical before / after energy data for improvement actions and simple energy awareness programmes.

Where WattCheck Fits

Use Case	Why WattCheck Helps
Panel Space Is Limited	Does not require DIN rail space, making it easier to deploy in compact distribution boards.
Fast Circuit Visibility Is Needed	Provides practical energy data without the complexity of a full conventional sub-metering system.
Remote App Monitoring Is Preferred	Uses Tuya / Smart Life app integration for simple access and monitoring.
Small Sites Need Energy Awareness	Supports homes, offices, retail outlets and small businesses that need simple energy visibility.
Selected Load Monitoring	Useful for monitoring air-conditioning, lighting, tenant loads, machines or critical circuits.

Part of the 3Wire and IoTWatt 4.0 Ecosystem

WattCheck is part of Saturn Pyro’s 3Wire ecosystem of practical IIoT-enabled monitoring devices. It is designed for simple and fast energy visibility where a compact app-based solution is required.

For larger industrial and commercial sites that require advanced dashboards, EECA reports, digital energy audits, equipment analytics, WattSave savings tracking and long-term energy intelligence, Saturn Pyro can support wider integration through IoTWatt 4.0 and suitable metering / gateway architecture.

IoTWatt 4.0 call to action

Use WattCheck for fast circuit-level visibility. Use IoTWatt 4.0 when the site requires enterprise-level energy dashboards, analytics, tickets, EECA reporting, digital energy audit evidence and verified savings management.

Recommended Deployment Checklist

Confirm single-phase or three-phase system requirement.
Confirm breaker type, feeder type and installation space.
Confirm maximum current and suitable WattCheck model.
Confirm voltage system and wiring arrangement.
Confirm Wi-Fi signal quality at the distribution board.
Confirm Tuya / Smart Life app access and user account arrangement.
Confirm which circuits should be monitored first.
Confirm installation by competent electrical personnel.

Related Keywords

3Wire WattCheck Smart Power Meter Wi-Fi Energy Meter MCB Power Meter MCCB Energy Meter Tuya Energy Meter Smart Life Power Meter Circuit-Level Energy Monitoring Retrofit Energy Meter No DIN Rail Meter Single-Phase Energy Meter Three-Phase Energy Meter

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

WattCheck Supply, Selection and Energy Monitoring Support

Saturn Pyro supports 3Wire WattCheck smart power meters for homes, offices, small businesses, retail outlets, branch sites, selected equipment monitoring, circuit-level energy visibility and wider IoTWatt 4.0 energy intelligence projects in Malaysia.