The Shelly EM is a Wi‑Fi energy meter with dual-channel monitoring, automation features, on-device history storage, and built-in contactor control—ideal for single-phase systems with local or cloud-free operation.
Product Description
The Shelly EM is a compact Wi‑Fi energy meter designed to monitor two independent circuits in single-phase systems. It supports automation, load control, and local history logging—perfect for smart energy management at home or in small facilities.
Key Features:
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Dual-channel monitoring for circuits up to 120 A each
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Built‑in contactor control (2 A relay) for automated load switching
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365-day on-device history of energy use, voltage, and power factor
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Overheat protection for safe operation
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Advanced automation via scheduling, limits, or prepaid quotas
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Full local control with REST API, MQTT, and scripting support
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Works with Alexa, Google Assistant, and Android/iOS apps
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Compact DIN-rail form factor (approx. 39 × 36 × 17 mm)
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Ultra low idle power consumption (<1 W)
Form Factor
| Attribute | Value | Description | Why It Matters |
|---|---|---|---|
| Height | N/A | Total standing height (cm) | Human-scale enables use of tools, navigation of spaces |
| Width | N/A | Shoulder-to-shoulder width (cm) | Affects balance, door/passage fit |
| Weight | N/A | Total mass (kg) | Impacts mobility, safety, power usage, transportability |
Power System
| Attribute | Value | Description | Why It Matters |
|---|---|---|---|
| Battery Type | N/A | Li-ion / LiFePO4 / etc. | Determines energy density, safety |
| Battery Capacity | N/A | Wh or Ah | Impacts range and operating time |
| Operating Duration | N/A | Hours under normal load | Key for logistics, shift planning |
Performance
| Attribute | Value | Description | Why It Matters |
|---|---|---|---|
| Payload Capacity | N/A | Maximum carrying capacity (kg) | Determines real-world utility |
| Speed | N/A | Maximum operational speed | Task completion rate & productivity |
| Precision | N/A | Positioning accuracy (mm) | Quality of work & application suitability |
| Repeatability | N/A | Consistency of positioning (±mm) | Manufacturing quality & reliability |
| Cycle Time | N/A | Time per standard operation | Productivity & throughput calculations |
| MTBF | N/A | Mean Time Between Failures (hours) | Reliability & maintenance planning |
| Service Life | N/A | Expected operational lifespan (years) | ROI calculations & replacement planning |
Connectivity
| Attribute | Value | Description | Why It Matters |
|---|---|---|---|
| Communication Protocol | N/A | Wi-Fi / Ethernet / 5G / Bluetooth | Network integration capabilities |
| Remote Control | N/A | Web / App / Joystick / API | Needed for manual override or remote training |
| Programming Interface | N/A | Drag-drop / Code / Visual / Teach pendant | Ease of deployment and customization |
| Integration APIs | N/A | Available software interfaces | System integration capabilities |
| Cloud Connectivity | N/A | Cloud platform compatibility | Data analytics & remote monitoring |
| Security Features | N/A | Encryption & authentication methods | Cybersecurity compliance |
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