Shelly EM Gen3 Smart Energy Monitor & 50A Clamp

The SHELLY-EM-GEN3 represents the third generation of smart energy monitoring technology, delivering precise electrical consumption measurement in an exceptionally compact form factor. This single-phase energy meter utilises up to two contactless current transformers for non-intrusive monitoring, enabling detailed tracking of appliance-level electricity usage. Data can be reported directly to mobile devices, tablets, PCs, or integrated home automation systems through both local Wi-Fi connectivity and cloud-based services.

With its internal data storage capability, the device maintains comprehensive energy records for later retrieval and analysis, even during network interruptions. The inclusion of a single dry contact switch provides flexible control of external loads, while the compact dimensions make retrofitting into standard electrical installations straightforward. The device operates effectively in standalone mode within local networks or can be managed through comprehensive cloud automation platforms for remote access from any location with internet connectivity.

Technical Specifications

• Physical Dimensions: 37x42x16 mm / 1.46x1.65x0.63 inch
• Weight: EM Gen3 unit - 23 g / 0.81 oz, CT 50A transformer - 50 g / 1.76 oz
• Electrical Connections: Screw terminals with maximum torque 0.4 Nm / 3.5 lbin
• Conductor Compatibility: 0.2 to 2.5 mm² / 24 to 14 AWG (solid, stranded, and bootlace ferrules)
• Stripped Conductor Length: 6 to 7 mm / 0.24 to 0.28 inch
• Environmental Rating: Operating temperature -20°C to 40°C / -5°F to 105°F, Humidity 30% to 70% RH
• Mounting Options: Wall console, electrical cabinet installations
• Enclosure: Plastic shell in white or charcoal grey colour variants with black connectors

Key Features

• Compact Form Factor: Minimal space requirements enable installation in confined areas including standard electrical wall boxes
• Dual-Channel Measurement: Single-phase monitoring with two independent current transformer inputs
• Contactless Metering: Non-intrusive current measurement via clip-on transformers
• Integrated Control: Dry contact relay for external load switching and control applications
• Data Logging: Internal storage maintains up to 10 days of minute-by-minute energy records
• Real-Time Clock: Accurate timestamping of all energy consumption data
• Multiple Interface Options: Embedded web interface for local configuration alongside cloud connectivity

Use Cases

• Power Consumption Monitoring: Real-time tracking of connected devices' electricity usage provides valuable insights into energy consumption patterns for informed decision-making regarding usage reduction.
• Energy Efficiency Optimisation: Identification of electrical consumption patterns enables systematic optimisation of electricity usage across residential and commercial applications.
• Appliance Health Assessment: Continuous monitoring of individual appliance power consumption facilitates performance tracking over time, with sudden spikes or consumption changes indicating potential maintenance requirements.
• Cost Management: Detailed power consumption knowledge enables accurate estimation of operating costs for specific devices, supporting more effective electricity expense management.
• Space-Efficient Retrofitting: Simple integration into existing electrical installations without requiring additional space, making it ideal for upgrade projects in residential and light commercial environments.