Shelly EM Gen3 — Wi-Fi Gen3 Energy Meter with 50A CT Clamp
- Envío gratis a partir de 50 € · entrega en 24/48h
- Garantía oficial 3 años · soporte técnico en español
- Distribuidor oficial Shelly · PRO Partner
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Shelly EM Gen3 — WiFi Energy Meter
The Shelly EM Gen3 (model S3EM-002CXCEU) is a 3rd generation WiFi energy meter with two independent measuring channels. It includes a 50A current clamp and a dry contact output to control an external contactor. Compatible with DIN rail mounting.
- Model: S3EM-002CXCEU
- Connectivity: WiFi 802.11 b/g/n (2.4 GHz) + Bluetooth BLE 4.2
- Power Supply: 100-260V AC
- Measuring Channels: 2 independent (up to 120A total)
- Current Clamp Included: 50A
- Dry Contact Output: 2A/230V AC
- Operating Temperature: -40°C to +60°C
- Mounting: DIN Rail
- Protocols: MQTT, HTTP REST API, WebSockets, Webhooks, mJS Scripting
Use Cases
- Real-time electricity consumption monitoring for homes and commercial premises
- Contactor control for electricity tariff management or specific loads
- Integration with Home Assistant for local energy automation
- Permanent installation in electrical panel on DIN rail
Integrations: Home Assistant (local, no cloud), Amazon Alexa, Google Home, MQTT, HTTP REST API, mJS Scripting. No hub or subscriptions.
Conectividad
- RF Band: 2400 - 2495 MHz
- Max. RF Power: <20 dBm
- Wi-Fi Protocol: 802.11 b/g/n (2.4 GHz)
- Wi-Fi Range: Up to 30 m indoors / 50 m outdoors
- Bluetooth Protocol: BLE 4.2
- Bluetooth Range: Up to 10 m indoors / 30 m outdoors
Especificaciones técnicas

| PHYSICAL | |
|---|---|
| Size (HxWxD): | 37x42x16mm/1.46x1.65x0.63inch |
| Weight: | EM Gen3 - 23 g / 0.81 oz CT 50A - 50 g / 1.76 oz |
| Maximum screw terminal torque: | 0.4 Nm / 3.5 lbin |
| Conductor cross section: | 0.2 to 2.5 mm² / 24 to 14 AWG (solid, stranded and crimp terminals) |
| Stripped conductor length: | 6 to 7 mm / 0.24 to 0.28 in |
| Mounting: | Wall console, electrical cabinet |
| Housing material: | Plastic |
| Housing color: | White Charcoal gray |
| Connector color: | Black |
| ENVIRONMENTAL | |
| Ambient working temperature: | -20°C to 40°C / -5°F to 105°F |
| Humidity: | 30% to 70% RH |
| Maximum altitude: | 2000 m / 6562 ft |
| ELECTRIC | |
| Power supply: | 110 - 240 V~ 50/60 Hz |
| Energy consumption: | < 1.2 W |
| Neutral not required: | Yes or no |
| External protection: | 2 A, trigger characteristic B or C, interrupting capacity of 6 kA, energy limitation class 3 |
| EXIT CIRCUIT CLASSIFICATIONS | |
| Maximum switching voltage: | 240 V~ |
| Maximum switching current: | 2 A/240 V~ |
| SENSORS, METERS | |
| Voltmeter (AC): | 110-240 V~ 50/60 Hz |
| Voltmeter accuracy: | ±2% |
| Ammeter (AC): | 0 - 80A |
| Ammeter accuracy: | ±2% (2 - 50 A), ±2% (1 - 2 A), ±5% (0 - 1 A) |
| Compatible current transformers: | CT 50A (included in the package) CT 80A |
| Power and energy meters: | Active and apparent power Active and apparent energy Power factor Fundamental active energy and fundamental reactive energy |
| Minimum channel-to-channel calibration load: | 500 W |
| No-load threshold: | 30 VA per channel |
| Storage of measurement data: | At least 10 days of 1-minute data resolution |
| Data export: | CSV for PQ Registered Values Export in JSON format via RPC |
| Internal temperature sensor: | Yeah |
| RADIO | |
| Wi-Fi | |
| Protocol: | 802.11 b/g/n |
| RF Band: | 2412 - 2472 MHz |
| Maximum RF power: | < 20 dBm |
| Range: | Up to 30 m indoors and 50 m outdoors (Depends on local conditions) |
| Bluetooth | |
| Protocol: | 4.2 |
| RF Band: | 2402 - 2480 MHz |
| Maximum 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 |
| FIRMWARE CAPABILITIES | |
| Programming: | Yeah |
| Webhooks (URL actions): | 20 with 5 URLs per webhook |
| Scripting: | Yeah |
| MQTT: | Yeah |
| Encryption: | Yes (transport level) |
| Authentication: | Yes (application and transport level) |
Documentación y recursos
Official Knowledge Base
Shelly EM Gen3 — Official Documentation
API and Technical Documentation
All Shelly Devices and Services
Certifications and Regulatory Compliance
Envío en 24/48h a España peninsular y Baleares (también Portugal continental). Envío gratis a partir de 50 €. Garantía legal de 3 años. Devoluciones en 14 días. Factura con IVA y soporte técnico real en español.