Shelly EM Gen 3 – Dual-Channel Energy Monitor
Monitor your site’s power usage in real time with the Shelly EM Gen 3. Designed for commercial and industrial use, it measures two single-phase circuits at once, helping you track high-draw equipment, reduce energy costs, and improve efficiency.
Features:
- Wi-Fi & Bluetooth connectivity
- Two current transformer inputs (contactless)
- Single phase, dual-channel measurement
- Dry contact switch for contactor control
- Local data logs (10 days @ 1-minute intervals)
- Smart schedules & real-time clock
- MQTT, HTTP, WebSocket, RPC & webhook support
- Works with leading automation platforms
Perfect for workshops, warehouses, and multi-site operations that need accurate, actionable energy insights.
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Physical |
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Size (HxWxD): |
37x42x16 mm / 1.46x1.65x0.63 inch |
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Weight: |
EM Gen3 - 23 g / 0.81 oz CT 50A - 50 g / 1.76 oz |
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Screw terminals max torque: |
0.4 Nm / 3.5 lbin |
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Conductor cross section: |
0.2 to 2.5 mm² / 24 to 14 AWG (solid, stranded, and bootlace ferrules) |
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Conductor stripped length: |
6 to 7 mm / 0.24 to 0.28 in |
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Mounting: |
Wall console, Electrical cabinet |
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Shell material: |
Plastic |
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Shell color: |
White Charcoal gray |
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Connectors color: |
Black |
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Environmental |
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Ambient working temperature: |
-20 °C to 40 °C / -5 °F to 105 °F |
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Humidity: |
30 % to 70 % RH |
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Max. altitude: |
2000 m / 6562 ft |
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Electrical |
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Power supply: |
110 - 240 V~ 50/60 Hz |
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Power consumption: |
< 1.2 W |
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Neutral not needed: |
Yes or No |
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External protection: |
2 A, tripping characteristic B or C, |
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Output circuits ratings |
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Max. switching voltage: |
240 V~ |
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Max. switching current: |
2 A/240 V~ |
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Sensors, meters |
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Voltmeter (AC): |
110-240 V~ 50/60 Hz |
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Voltmeter accuracy: |
±2% |
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Ammeter (AC): |
0 - 80A |
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Ammeter accuracy: |
±2 % (2 - 50 A), ±2 % (1 - 2 A), ±5 % (0 - 1 A) |
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Compatible current transformers: |
CT 50A (included in the package) CT 80A |
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Power and energy meters: |
Active and apparent power Active and apparent energy Power factor Fundamental active and fundamental reactive energy |
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Channel-to-channel calibration minimum load: |
500 W |
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No load threshold: |
30 VA per channel |
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Measurement data storage: |
At least 10 days of 1 min data resolution |
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Data export: |
CSV for PQ recorded values JSON format export through RPC |
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Internal-temperature sensor: |
Yes |
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Radio |
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Wi-Fi |
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Protocol: |
802.11 b/g/n |
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RF band: |
2412 - 2472 МHz |
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Max. RF power: |
< 20 dBm |
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Range: |
Up to 30 m / 100 ft indoors and 50 m / 160 ft outdoors |
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Bluetooth |
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Protocol: |
4.2 |
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RF band: |
2402 - 2480 MHz |
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Max. RF power: |
< 4 dBm |
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Range: |
Up to 10 m / 33 ft indoors and 30 m / 100 ft outdoors |
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Microcontroller unit |
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CPU: |
ESP-Shelly-C38F |
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Flash: |
8 MB |
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Firmware capabilities |
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Schedules: |
Yes |
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Webhooks (URL actions): |
20 with 5 URLs per hook |
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Scripting: |
Yes |
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MQTT: |
Yes |
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Encryption: |
Yes (Transport level) |
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Authentication: |
Yes (Application and transport level) |
