Compact, Versatile, and Ready to Fit Anywhere

The device offers precise 4-quadrant measurement for accurate energy monitoring across both three-phase systems and single-phase circuits. Its flexible setup allows standalone Wi-Fi use or integration with popular home automation platforms. The device’s compact design makes installation easy. Additionally, it’s future-ready, supporting photovoltaic system monitoring to track solar energy production alongside grid usage.

Wi-Fi operated, Bluetooth inclusion

Connect the device to your Wi-Fi network. No HUB required!

Flexible installation

Fitting above or below DIN-rail circuit breakers.

Energy Metering

Monitor voltage, current, power factor, and active and apparent power and energy.

Multiple Connection Types

Supports three-phase or single-phase installations.

Advanced-Data Logging

Stores energy data for up to 7 days in 1-minute intervals.

Current transformer connection

Non-contact current measurements

Features of Shelly 3EM-63W Gen3

• 4-quadrant measurement
• Multiple connection types: three phase or single phase installations
• Non-contact current measurements through current transformers
• Phase sequence error detection (option)
• No load threshold
• Optical pulse indication of energy usage
• Real-time clock: stored data keeps correct timestamps even if the internet connection is interrupted.
• Data logs: up to 7 days of data stored on the device for later retrieval
• Accuracy Class B (IEC 62053-21)
• Photovoltaic ready

Technical specifications of Shelly 3EM-63W Gen3

• Physical
• Size (HxWxD): 21x54x42 mm (without the wires)
• Wires length: 260 mm (including the flat terminal)
• Weight: 58 g  (including the wire)
• Conductor aperture: Ø8 mm
• Mounting: Above or under DIN-rail mounted circuit breakers
• Shell material: Plastic
• Shell color: White
• Environmental
• Ambient working temperature: -20 °C to 40 °C
• Humidity: 30 % to 70 % RH
• Electrical
• Power supply: 220-240 V~ 50/60 Hz (between LA and N)
• Power consumption: < 2 W
• External protection: 63 A, tripping characteristic B or C, 6 kA interrupting rating, Energy limiting class 3
• Sensors, meters
• Internal-temperature sensor: Yes
• Voltmeters (RMS for each phase): 220-240 V~ 50/60 Hz
• Voltmeters accuracy: better than ±1%
• Ammeters (RMS via integrated CT for each phase): 0 - 63 A (130 A saturation)
• Ammeters accuracy: ±1 % (2 - 63 A), ±2 % (1 - 2 A), ±5 % (0 - 1 A)
• Power and energy meters:
• Active and apparent power
• Active and apparent energy
• Power factor
• Fundamental active and fundamental reactive energy
• No load threshold: 30 VA
• Measurement data storage: At least 7 days of 1 min data resolution
• Data export: CSV for PQ recorded values
• JSON format export through RPC
• Wi-Fi
• Protocol: 802.11 b/g/n
• RF band: 2401 - 2483 МHz
• Max. RF power: < 20 dBm
• Range: Up to 30 m indoors and 50 m outdoors (Depends on local conditions)
• Bluetooth
• Protocol: 4.2
• RF band: 2400 - 2483.5 MHz
• Max. RF power: < 4 dBm
• Range: Up to 10 m indoors and 30 m outdoors (Depends on local conditions)
• Microcontroller unit
• CPU: ESP-Shelly-C38F
• Flash: 8 MB