Shelly Pro 3EM
Next-generation DIN-mountable 3-Phase Energy Meter
Shelly Pro 3EM is a DIN rail mountable three-phase energy meter. Enhanced with all the gen2 firmware flexibility and LAN connectivity, it provides professional integrators with additional options for end-customer solutions. Shelly Pro 3EM reports accumulated energy as well as instantaneous voltage, current, and power factor per phase in real-time.
- 4 quadrant measurement with multiple connection types
- Accuracy Class B (IEC 62053-21)
- Photovoltaic ready
- Phase sequence error detection* (option)
- Optical pulse indication of energy usage
- Measurement accuracy tо 1%
- Stores data in non-volatile memory that can be retrieved for a period of up to 60 days in 1-minute intervals
- Package includes 3 pieces of 120A Current Transformers.
WHY SHELLY PRO 3EM?
Next-generation 3-Phase Energy Meter
Shelly Pro 3EM supports mTLS for MQTT, HTTP, and secure outbound WebSockets. Its industry-grade security allows for direct connections to your cloud infrastructure, reducing the cost of deploying complex networks and VPNs.
Shelly Pro 3EM brings support for MODBUS for voltage, current, power, and energies. You can accurately sample your energy usage and instantaneous values of voltage, current, and power. Our new firmware platform allows for custom implementation that can report as fast as every 100ms to your infrastructure.
Monitor your home, office, or factory, and avoid additional expenses or drops in voltage that can damage your appliances and devices. Shelly Pro 3EM can calculate 2-way consumption: produced and used energy for each of the three phases. The device can be configured to measure three separate circuits of a mono-phase electrical system. View the quality of your electricity network regarding active power, reactive power, voltage, and power factor.
Thanks to Shelly Pro 3EM's scripting functionalities and webhooks, you can now easily control other Shelly or Wi-Fi devices on your local network. Use these capabilities to set exact parameters for heating, cooling, or electric vehicle charging based on PV production and have your devices automatically shed power usage. All these work without using a cloud.
NOTES
-
Standard warranty (included in purchase price): 5 Years warranty through manufacturer due to device malfunctions when it is used in user manual described conditions.
-
While this is technically user-installable in many locales, we recommend consulting a licensed electrician to install automation components - in addition to being licensed to work with electrical devices, they are also familiar with local building codes.
- Manufacturer's note: Each Shelly device emits heat under load. Do not combine two or more Shelly devices stacked on top of each other in a confined space. There must be a minimum distance of 1 cm between them to allow for airflow.
SPECIFICATIONS
| Physical | |
|---|---|
| Current Transformer: | 3 x CT120 included in the package |
| Size (HxWxD): | 94x19x69 ±0.5 mm / 3.70x0.75x2.71 ±0.02 in |
| Weight: | 62 ±1 g / 2.19 ±0.05 oz |
| Mounting: | DIN rail |
| Screw terminals max torque: | 0.4 Nm / 4.43 lbin |
| Conductor cross section: | 0.5 to 2.5 mm² / 20 to 14 AWG (solid, stranded and bootlace lugs) |
| Conductor stripped length: | 6 to 7 mm / 0.24 to 0.28 in |
| Shell material: | Plastic |
| Color: | White |
| Environmental | |
| Ambient temperature: | -20 °C to 40 °C / -5 °F to 105 °F |
| Humidity: | 30 % to 70 % RH |
| Max. altitude: | 2000 m / 6562 ft |
| Electrical | |
| Power supply voltage AC: | 110 - 240 V, 50/60 Hz |
| Power supply voltage DC: | N/A |
| Power consumption: | < 3 W |
| Sensors, meters | |
| Temperature sensor: | Yes |
| Voltmeters (RMS for each phase): | 100 - 260 V |
| Voltmeters accuracy: | ±1 % |
|
Ammeters (RMS via CT for each phase and the Neutral): |
0 - 120 A |
| Ammeters accuracy: | ±1 % (2 - 120 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 |
| Measurement data storage: | At least 60 days of 1 min data resolution |
| Data export: | CSV for PQ recorded values, JSON format export through RPC |
| Radio | |
| RF band: | 2401 - 2495 MHz |
| Max. RF power: | <20 dBm |
| Wi-Fi protocol: | 802.11 b/g/n |
| Wi-Fi Range: | Up to 30 m / 100 ft indoors and 50 m / 160 ft outdoors (Depends on local conditions) |
| Bluetooth Protocol: | 4.2 |
| Bluetooth Range: | Up to 10 m / 33 ft indoors and 30 m / 100 ft outdoors (Depends on local conditions) |
| MCU | |
| CPU: | ESP32-D0WDQ6 |
| Flash: | 16 MB |
| Firmware capabilities | |
| Webhooks (URL actions): | 20 with 5 URLs per hook |
| Scripting: | mJS |
| MQTT: | Yes |
| CoAP: | No |