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:
-
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
-
Overheat protection for safe operation
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Advanced automation via scheduling, limits, or prepaid quotas
-
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
10
Total standing height (cm)
Human-scale enables use of tools, navigation of spaces
Width
20
Shoulder-to-shoulder width (cm)
Affects balance, door/passage fit
Weight
52
Total mass (kg)
Impacts mobility, safety, power usage, transportability
Power System
Attribute
Value
Description
Why It Matters
Battery Type
Alkaline Battery
Li-ion / LiFePO4 / etc.
Determines energy density, safety
Battery Capacity
Wh or Ah
Impacts range and operating time
Operating Duration
Hours under normal load
Key for logistics, shift planning
Performance
Attribute
Value
Description
Why It Matters
Payload Capacity
Maximum carrying capacity (kg)
Determines real-world utility
Speed
Maximum operational speed
Task completion rate & productivity
Precision
Positioning accuracy (mm)
Quality of work & application suitability
Repeatability
Consistency of positioning (±mm)
Manufacturing quality & reliability
Cycle Time
Time per standard operation
Productivity & throughput calculations
MTBF
Mean Time Between Failures (hours)
Reliability & maintenance planning
Service Life
Expected operational lifespan (years)
ROI calculations & replacement planning
Connectivity
Attribute
Value
Description
Why It Matters
Communication Protocol
Wi-Fi / Ethernet / 5G / Bluetooth
Network integration capabilities
Remote Control
Web / App / Joystick / API
Needed for manual override or remote training
Programming Interface
Drag-drop / Code / Visual / Teach pendant
Ease of deployment and customization
Integration APIs
Available software interfaces
System integration capabilities
Cloud Connectivity
Cloud platform compatibility
Data analytics & remote monitoring
Security Features
Encryption & authentication methods
Cybersecurity compliance
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