Description

Shelly EM Gen3 1x50A CT Smart Energy Meter

Precision Energy Monitoring & Smart Load Control for Modern Homes and Businesses

Gain powerful insight into your electricity usage with the Shelly EM Gen3, a compact yet professional-grade smart energy meter designed for accurate real-time monitoring and intelligent automation. Built by Shelly Group, this third-generation energy monitoring solution combines precision measurement, flexible connectivity, and powerful automation features—making it ideal for South African homes, small businesses, solar installations, and energy-conscious users.

Whether you’re looking to monitor whole-home consumption, track solar production, or automate high-load appliances like geysers and pool pumps, the Shelly EM Gen3 provides the reliable data and control needed to reduce energy waste and lower electricity costs.

Why Choose the Shelly EM Gen3 Energy Meter?

Energy costs continue to rise, and understanding your usage patterns is the first step toward saving money. The Shelly EM Gen3 delivers real-time energy insights, allowing homeowners, electricians, and installers to identify inefficiencies, monitor heavy loads, and automate energy-intensive equipment.

Its non-invasive CT clamp design, dual wireless connectivity, and local-first architecture make it one of the most flexible and powerful energy monitoring solutions available.

Key Features & Benefits

Accurate Contactless Energy Monitoring

The Shelly EM Gen3 includes one high-precision 50A current transformer (CT clamp) that enables safe, non-invasive installation without cutting or rewiring existing circuits.

You can monitor:

• Voltage (V)
• Current (A)
• Active Power (W)
• Apparent Power (VA)
• Power Factor
• Energy Consumption (kWh)

For expanded applications, the system supports:

• Optional second CT input
• Compatibility with optional 80A CT clamps
• Single-phase monitoring flexibility
• Circuit-level or whole-home monitoring

This level of precision allows accurate measurement of energy usage across residential and light commercial environments.

Real-Time Data Monitoring & Historical Logging

Track your electricity consumption as it happens.

Using the Shelly Smart Control app or web interface, you can:

• View live power consumption
• Monitor energy trends
• Detect unusual usage spikes
• Optimise energy usage patterns

Data Storage Capabilities

• Up to 10 days of local data stored at 1-minute intervals
• Up to 365 days of cloud history
• Export data in:
  • CSV format
  • JSON format
• Ideal for:
  • Energy audits
  • Billing verification
  • Solar performance analysis

Local storage ensures your data remains accessible even during internet outages.

Built-In Smart Load Control (Dry Contact Output)

The Shelly EM Gen3 is more than just a meter—it can actively control high-power loads.

It includes a 2A / 240V dry contact output, allowing it to switch external contactors or relays safely.

Perfect for controlling:

• Electric geysers
• Pool pumps
• Heat pumps
• Air conditioners
• Underfloor heating
• Solar diversion loads

Use automation rules to switch loads based on:

• Energy consumption levels
• Solar production
• Time schedules
• Tariff periods

This capability enables meaningful energy savings through intelligent automation.

Smart Connectivity — No Hub Required

The Shelly EM Gen3 connects directly to your network using:

• WiFi (2.4GHz)
• Bluetooth (BLE)

No hub is required.

Bluetooth functionality also enables the device to act as a BLE gateway, extending smart home functionality by connecting additional Bluetooth devices to your network.

Seamless Smart Home Integration

The Shelly EM Gen3 integrates with popular smart home ecosystems and automation platforms.

Compatible systems include:

• Home Assistant
• MQTT-based systems
• Webhooks
• REST APIs
• Major voice assistants
• Smart automation workflows

This flexibility makes the device suitable for both hobbyists and professional installers.

Matter-Ready Future Compatibility

The Shelly EM Gen3 is Matter-ready, allowing compatibility with next-generation smart home ecosystems through future firmware updates.

Matter support ensures:

• Cross-platform compatibility
• Future-proof smart home integration
• Simplified device interoperability

This keeps your smart home investment relevant as technology evolves.

Compact Design for Flexible Installation

With its ultra-compact form factor, the Shelly EM Gen3 fits easily into:

• Standard electrical wall boxes
• Distribution boards
• DIN rail enclosures

Physical Highlights:

• Ultra-compact size: 37 x 42 x 16 mm
• Low power consumption: < 1.2W
• Wide voltage compatibility
• Robust operating temperature range

This makes installation straightforward in both new and existing electrical systems.

Perfect Applications in South Africa

The Shelly EM Gen3 is especially valuable in regions where electricity monitoring and load management are essential.

Ideal use cases include:

Whole-Home Energy Monitoring

Measure total household electricity consumption to:

• Track monthly usage
• Identify peak consumption times
• Reduce electricity costs
• Improve energy efficiency

Solar PV Production Monitoring

Monitor solar system output in real time.

Useful for:

• Solar generation tracking
• Net metering
• Export/import analysis
• Optimising battery usage

Appliance-Level Monitoring

Track individual high-load devices such as:

• Geysers
• Pool pumps
• Air conditioners
• Workshop equipment

This helps identify energy-heavy appliances and optimise usage patterns.

Smart Load Scheduling & Automation

Automate devices based on:

• Time-of-use tariffs
• Solar generation availability
• Load-shedding schedules
• Energy thresholds

This creates opportunities for real cost savings.

Reliable Local Operation & Privacy

The Shelly EM Gen3 supports local-first control, ensuring reliability even when cloud connectivity is unavailable.

Benefits include:

• Continued operation during internet outages
• Reduced dependency on external servers
• Increased privacy
• Faster response times

This makes it especially valuable for mission-critical automation environments.

Installation Options

Installation is flexible and suitable for:

• DIY installers with electrical knowledge
• Professional electricians
• Smart home integrators

The non-invasive CT clamp design makes installation safe and straightforward without cutting wires.

For complex installations or high-current circuits, professional installation is recommended.

Technical Specifications

Product: Shelly EM Gen3
Included CT Clamp: 1 × 50A
Optional CT Clamp: 80A supported

Power Supply:
110–240V~ 50/60Hz

Measurements:
Voltage
Current
Active Power
Apparent Power
Power Factor
Energy (kWh)

Connectivity:
WiFi: 2.4GHz
Bluetooth: Yes (BLE Gateway Supported)

Control Output:
Dry Contact: 2A / 240V

Local Storage:
Up to 10 days (1-minute intervals)

Cloud Storage:
Up to 365 days

Dimensions:
37 × 42 × 16 mm

Operating Temperature:
-20°C to +40°C

Power Consumption:
< 1.2W

What’s Included in the Box

• 1 × Shelly EM Gen3 Energy Meter
• 1 × 50A Current Transformer (CT Clamp)
• Installation Guide

Why Install an Energy Meter?

Installing an energy meter like the Shelly EM Gen3 enables smarter energy management and long-term cost savings.

Typical benefits include:

• Lower electricity bills
• Improved load management
• Faster identification of faulty appliances
• Optimised solar energy usage
• Reduced energy waste
• Greater control over electrical systems

Start Monitoring Smarter Today

Take control of your energy usage with the Shelly EM Gen3 1x50A CT Smart Energy Meter—a powerful, compact solution designed to deliver professional-level insights and automation capabilities in residential and light commercial environments.

Whether you’re upgrading a smart home, installing solar monitoring, or optimising energy consumption, the Shelly EM Gen3 delivers the data and control needed to make informed energy decisions.