Shelly PRO 3EM 120A three-phase electricity meter with WiFi/Bluetooth/Matter
Shelly Pro 3EM 120A is a professional, three-phase electricity meter designed for DIN rail mounting. The device records accumulated energy with an accuracy of 1%, as well as instantaneous voltage, current and power for each phase in real time. It stores data from the last 60 days at one-minute intervals for each phase, allowing for detailed analysis. It can operate autonomously on a local LAN and/or Wi-Fi network, or be managed via a home automation cloud service using MQTT, HTTP and WebSocket protocols. In addition, thanks to the scenario creation feature, it allows the creation of advanced scenarios and offers extensive monitoring options. The device is also compatible with the Matter standard, making it even easier to integrate it into selected smart home systems.

Specifications:
| Manufacturer | Shelly |
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| Model | PRO 3EM Matter |
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| AC power supply | 100 - 260V, 50/60Hz |
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| Power consumption | < 3W |
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| Internal temperature sensor | Yes |
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| Voltmeters (RMS for each phase) | 100 - 260V |
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| Voltmeter accuracy | ±1>#/td### |
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| Ammeters (RMS via current transformers for each phase and neutral) | 0 - 120A |
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| Compatible current transformer (CT) | CT 120A |
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| Ammeter accuracy | ±1% (2 - 120 A), ±2% (1 - 2 A), ±5% (0 - 1 A) |
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| Active and apparent energy and power meters | Active and apparent power, active and apparent energy, power factor, active energy and basic reactive energy |
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| Calibration between channels at minimum load | 500 W per channel |
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| No-load limit | 30 VA per channel |
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| Measurement data storage: | At least 60 days with 1 minute data analysis |
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| Wi-Fi protocol | 802.11 b/g/n |
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| Wi-Fi range | Up to 30 m indoors and 50 m outdoors |
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| Bluetooth protocol | 4.2 |
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| Bluetooth range | Up to 10 m indoors and 30 m outdoors |
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| CPU | ESP32-D0WDQ6 |
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| Flash memory | 16MB |
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| Dimensions | 94 x 19 x 69 ±0.5mm |
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| Weight | 62 ±1g |
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| Support | DIN rail |
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| Housing material | Plastic |
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| Ambient temperature | -20°C to +40°C |
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| Moisture | 30% to 70% RH |
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| Maximum altitude | 2000 m |
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| Compatibility with Matter | Yes |
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