SONOFF POWCT Ring Smart Power Meter | POWCT

Smart Energy Monitoring Without Direct Contact

The SONOFF POW CT Ring POWCT is a smart WiFi energy monitoring solution designed to measure electrical consumption safely using a split-core current transformer (CT) clamp. With current detection up to 100A, it can monitor individual circuits, rooms, appliances or larger electrical installations without requiring direct contact with the live conductor.

100A Split-Core CT Clamp

The included split-core current transformer can detect current from 0–100A. The clamp opens and closes around the conductor, allowing non-invasive current measurement without disconnecting the monitored cable from the electrical circuit.

Real-Time Energy Monitoring

Monitor electrical usage in real time through the SONOFF smart home ecosystem. The POWCT provides useful energy information for understanding the consumption of appliances, rooms and individual circuits.

Monitor Circuits, Appliances & Rooms

Install the POWCT within a suitable electrical distribution panel to monitor the energy consumption of specific circuits or appliances. This makes it useful for applications such as geysers, pumps, air conditioners and other high-consumption electrical equipment.

Solar & Bidirectional Energy Monitoring

The POWCT can monitor bidirectional power flow, allowing it to track both electricity consumed from the grid and electricity exported back to the grid. This makes it suitable for energy-monitoring applications involving solar generation and battery-storage systems.

Six Months of Historical Data

Review hourly electricity usage history for up to six months. Historical information can also be exported for further analysis, helping you identify consumption patterns and monitor changes in energy usage over time.

2A Dry Contact Output

The POWCT includes a 2A dry-contact relay output that can be connected to an external contactor. This allows the POWCT to provide control of larger electrical loads through an appropriately rated contactor rather than switching the high-power load directly.

Contactor Control for High-Power Loads

When combined with a suitable external contactor, the POWCT can be incorporated into smart control systems for larger electrical loads. This provides a practical way to combine energy monitoring with automated load control.

WiFi Smart Home Connectivity

Connect the POWCT to a 2.4GHz WiFi network for smart monitoring and control. The device uses IEEE 802.11 b/g/n WiFi connectivity and integrates with the SONOFF smart home ecosystem.

eWeLink Smart Home Integration

The POWCT works with the eWeLink ecosystem, allowing energy information and supported automation functions to be managed alongside compatible smart-home devices.

External SMA Antenna

The POWCT features an SMA antenna interface, allowing the device to use an external WiFi antenna for its wireless connection.

Compact Electrical Panel Design

With dimensions of approximately 98 × 54 × 31 mm, the POWCT is designed for installation in suitable electrical distribution environments. The main unit has a white PC housing.

Indoor Electrical Monitoring

The POWCT is specified for indoor use and has an operating temperature range of approximately -40°C to 50°C, with 5–95% relative humidity, non-condensing.

Suitable for Geyser & Energy Monitoring

The POWCT is particularly useful for monitoring high-consumption appliances such as geysers and pumps. Its CT clamp allows current monitoring up to 100A, while the dry-contact output can be used with a suitable contactor for load control.

Non-Invasive Current Measurement

Because the CT clamp measures current around the conductor rather than requiring the monitored conductor to pass directly through the meter, the POWCT provides a convenient method of measuring existing electrical circuits. Installation must still be carried out correctly and in accordance with applicable electrical requirements.

Smart Energy Management

Use consumption information and historical data to better understand where electricity is being used. The POWCT can form part of a broader smart energy-management system, including automation based on energy usage.

Key Features

• Model: POWCT
• SONOFF POW Ring Smart Power Meter
• 100A maximum current detection
• 0–100A CT detection range
• Split-core current transformer clamp
• Non-invasive current measurement
• Real-time energy monitoring
• Room, circuit and appliance monitoring
• Bidirectional power-flow monitoring
• Solar energy monitoring
• Up to 6 months of historical data
• Historical data export
• 2A dry-contact relay output
• External contactor control
• 2.4GHz WiFi
• IEEE 802.11 b/g/n
• SMA antenna interface
• RJ9 transformer interface
• eWeLink smart-home integration
• 100–240V AC, 50/60Hz, 2W
• 98 × 54 × 31 mm
• White PC housing
• Indoor use
• Operating temperature: -40°C to 50°C