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.
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.
Clips directly onto compatible protection or control devices and can be mounted on the top or bottom where suitable.
Does not occupy DIN rail space, making it easier to install in panels where space is already limited.
Monitor energy data remotely through Tuya and Smart Life apps without complex software setup.
Enables online monitoring and remote access for distributed sites, offices, shops and facilities.
Measure voltage, current, power and energy in real time to understand circuit-level consumption behaviour.
Supports fault notifications and alarms to help users detect issues early and respond faster.
WattCheck integrates with the Tuya App and Smart Life App, allowing users to access data, monitor electrical parameters and manage energy usage remotely.
View energy consumption, voltage, current and power from anywhere.
Analyse usage trends and operating behaviour through app-based visibility.
Receive fault notifications and support simple scene automation actions.
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 |
Monitor selected home circuits, air-conditioning loads, lighting circuits and high-usage electrical points.
Improve circuit-level energy visibility for offices, commercial spaces, common areas and selected loads.
Suitable for shops, clinics, branches, outlets and small facilities needing fast energy visibility.
Collect practical energy data before and after improvement actions.
Reduces wiring work, panel modification and installation complexity in suitable applications.
Understand usage at a practical circuit level instead of relying only on main incomer readings.
Use the Tuya or Smart Life app to monitor energy usage anytime and anywhere.
Ideal for existing panels where conventional sub-metering is difficult or costly.
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.
The following visual supports the WattCheck smart power meter, MCB / MCCB mounting and retrofit-friendly energy monitoring information above.
3Wire WattCheck Smart Power Meter
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.
Contact 3Wire / Saturn Pyro for WattCheck model selection, installation support and energy monitoring applications.
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