The Shelly 3EM-63W Gen3 is a compact 1/3-channel energy meter designed to monitor three-phase installations or three independent single-phase circuits. It is equipped with heavy-duty cables and is very easy to install. This small device is ideal for homes, apartments, businesses and photovoltaic installations - wherever precise control of energy consumption is important.
Shelly 3EM-63W Gen3 is a solution for everyone - whether you want to monitor energy consumption in the household, assign consumption to specific departments in the company, or supervise power production from PV panels. The device supports both three-phase installations and three independent single-phase lines, allowing it to fit almost any configuration. In addition, thanks to 4-quadrant metering, the meter records both energy consumed and energy given off, which is useful, for example, in photovoltaic and hybrid systems.
The module connects to the network via Wi-Fi and Bluetooth - without the need for an external gateway. It can be managed from the Shelly Smart Control app, web interface or via MQTT, HTTP and WebSocket protocols. All incoming connections are protected by TLS encryption. In turn, data can be exported in CSV or JSON format.
The Shelly 3EM-63W Gen3 offers measurement of voltage, current, active and apparent power, power factor and energy - with accuracy that meets Class B (IEC 62053-21). A built-in clock maintains the correct time stamps even if internet access is lost. Metering data is recorded locally at 1-minute intervals and stored for at least 7 days, giving you access to your consumption history even if you are temporarily not connected to the cloud.
Shelly 3EM-63W Gen3 allows you to create schedules (up to 20) and configure webhooks (up to 20, with up to 5 URLs each). What's more, local automation allows, for example, to respond to instantaneous energy consumption and trigger specific actions, and a built-in "no load threshold" prevents energy counting at very low consumption (less than 30 VA per channel).
The Shelly 3EM-63W Gen3 is also ideal for monitoring photovoltaic systems. It allows simultaneous tracking of energy production and consumption, allowing you to accurately adjust the operation of equipment to the temporary availability of power from the panels. This makes it easier to reduce the intake from the grid and optimize self-consumption - for example, running energy-intensive devices at the peak of sunshine.
The device features LEDs to indicate its current status (including Wi-Fi connectivity and OTA updates) and a single button to quickly enter configuration mode or reset to factory settings. It also has a built-in temperature sensor. In addition, it is very easy to install.
The meter works with the Shelly Smart Control app, which allows you to remotely manage the device, view energy consumption and create schedules and automations. With its help you can also monitor data, view measurement history and track energy costs.
| Manufacturer | Shelly |
|---|---|
| Model | 3EM-63W Gen3 |
| Dimensions | 21 × 54 × 42 mm (without cables) |
| Cable length | 260 mm |
| Weight | 58 g (with wires) |
| Diameter of conductive hole | 8 mm |
| Mounting | Above or below overcurrent circuit breakers on DIN rail |
| Housing material: | Plastic |
| Housing color: | White |
| Operating temperature | From -20°C to 40°C |
| Humidity: | 30% - 70% RH |
| Max. installation altitude: | 2000 m |
| Power supply | 220-240 V~ 50/60 Hz (between LA and N) |
| Power consumption | < 2 W |
| External protection | 63 A, characteristics B or C, short-circuit current 6 kA, energy limitation class 3 |
| Internal temperature sensor | Yes |
| Voltmeters (RMS for each phase) | 220-240 V~ 50/60 Hz |
| Accuracy of voltmeters | Better than ±1% |
| Ammeters (RMS via integrated current transformer for each phase) | 0-63 A (saturation 130 A) |
| Accuracy of ammeters | ±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, basic active and reactive energy |
| Minimum load threshold | 30 VA |
| Measurement data storage | At least 7 days with data resolution of 1 min |
| Data export | CSV for recorded PQ values, JSON via RPC |
| Wi-Fi protocol | 802.11 b/g/n |
| Wi-Fi RF bandwidth | 2401-2483 MHz |
| Max Wi-Fi RF signal strength | < 20 dBm |
| Wi-Fi connection range | Up to 30 m indoors / up to 50 m outdoors (depending on local conditions) |
| Bluetooth protocol | 4.2 |
| Bluetooth RF band | 2400-2483.5 MHz |
| Max. Bluetooth RF signal strength | < 4 dBm |
| Bluetooth connection range | Up to 10 m indoors / 30 m outdoors (depending on local conditions) |
| Processor (CPU) | ESP-Shelly-C38F |
| Flash memory | 8 MB |
| Schedules | Up to 20 |
| Webhooks (URL shares) | Up to 20, up to 5 URLs per webhook |
| Scripts: | Yes |
| MQTT | Yes |
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