Shelly PRO EM-50 DIN Rail Energy Meter with Wi-Fi & Bluetooth Control
The Shelly Pro EM-50 is a professional-grade DIN rail mountable two-channel, single-phase energy meter designed for accurate real-time monitoring and control of electrical consumption in homes, offices, retail stores, and industrial facilities. With 1% measurement accuracy, dual independent monitoring channels rated for 50A each, and an integrated dry contact relay for contactor control, it's the perfect solution for energy management, load control, and monitoring renewable energy systems.
Why You'll Love the Shelly Pro EM-50
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Dual-Channel Monitoring: Track two independent circuits on the same phase simultaneously with precision
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1% Measurement Accuracy: Professional-grade accuracy for active energy consumption monitoring
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60-Day Historical Data: Stores energy data locally in 1-minute intervals for detailed analysis
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Contactor Control: Built-in dry contact relay (2A) for controlling external contactors and larger loads
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Triple Connectivity: Wi-Fi, Ethernet (LAN), and Bluetooth 4.2 for maximum reliability and flexibility
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Advanced Scripting: Supports mjS scripting for complex automation scenes and custom functionality
Professional Energy Management Made Easy
Perfect for small to medium-sized businesses, the Shelly Pro EM-50 helps you monitor and control energy consumption with precision. Track power-hungry appliances like HVAC systems, air compressors, refrigeration units, and lighting circuits. Use the integrated contactor control to automatically shut down equipment during off-peak hours, reducing energy waste and costs. It's also ideal for home energy management, monitoring electric vehicle chargers, solar panel systems, and high-demand home appliances.
Smart Connectivity for Modern Installations
The Shelly Pro EM-50 offers simultaneous Ethernet and Wi-Fi connectivity, ensuring reliable operation even in environments with limited wireless coverage. With support for MQTT, HTTP, WebSocket, and TLS encryption, it integrates seamlessly with professional automation systems, home automation platforms like Home Assistant, and cloud-based monitoring services. No hub required - the device works standalone or as part of your existing smart home ecosystem.
Real-Time Monitoring & Historical Data
Monitor accumulated energy, instantaneous voltage, current, active power, and apparent power in real-time through the Shelly app or web interface. The device stores up to 60 days of energy data with 1-minute resolution in non-volatile memory, allowing you to analyze consumption patterns, identify energy waste, and optimize usage. The built-in real-time clock keeps accurate time even when disconnected from network time servers.
Renewable Energy & Solar Integration
For homes and businesses with photovoltaic (PV) systems, the Shelly Pro EM-50 can measure both grid-imported energy and energy generated from renewable sources. Configure load control to redirect excess solar energy to charge electric vehicles or power home appliances, maximizing your solar investment and reducing grid dependence.
Easy DIN Rail Installation
Designed for professional integrators, the compact DIN rail mounting allows fast deployment in breaker boxes and electrical panels. The device includes 2 x 50A current transformers (clamps) for safe, non-invasive installation around circuit cables. Supports conductor cross-sections from 0.5 to 2.5 mm² (20 to 14 AWG) for flexible wiring options.
Australian Smart Home & Business Applications
Whether you're managing energy costs in a commercial building, monitoring electrical circuits in a retail store, or optimizing home energy usage with solar panels, the Shelly Pro EM-50 delivers professional-grade monitoring and control. Perfect for Australian electricians, integrators, and energy-conscious homeowners looking for reliable, locally-controlled energy management without subscription fees.
What's in the Box
- Shelly Pro EM-50 Energy Meter (DIN rail mountable)
- 2 x 50A Current Transformers (clamps)
- User guide and safety documentation
Full Specifications
Physical
| Dimensions (H × W × D) |
94 × 19 × 69 mm (3.70 × 0.75 × 2.71 in) |
| Weight |
63 g (2.22 oz) |
| Mounting |
DIN rail |
| Shell Material |
Plastic |
| Color |
White |
Electrical
| Power Supply |
110-240 VAC, 50/60Hz |
| Power Consumption |
< 3 W |
| Voltage Range (Measurement) |
100-260 V RMS |
| Current Range (via CT) |
0-50 A per channel |
| Measurement Accuracy (Active Energy) |
1% |
| Voltage Meter Accuracy |
±1% |
| Current Meter Accuracy |
±1% (5-50 A), ±2% (0-5 A) |
| Max Switching Voltage (Relay) |
240 VAC |
| Relay Contact Rating |
2 A (dry contact for contactor control) |
| Conductor Cross Section |
0.5 to 2.5 mm² / 20 to 14 AWG |
| Screw Terminal Torque |
Max 0.4 Nm / 4.43 lbin |
Connectivity
| Wi-Fi |
802.11 b/g/n (2.4 GHz) |
| Ethernet |
Yes (LAN) |
| Bluetooth |
Bluetooth 4.2 |
| Protocols Supported |
MQTT, HTTP, WebSocket (inbound/outbound), UDP, mTLS, TLS |
| Cloud Integration |
Shelly Cloud (optional) |
Features
| Measurement Channels |
2 independent channels (single-phase) |
| Measurement Type |
4-Quadrant (active and apparent power) |
| Historical Data Storage |
60 days (1-minute resolution) |
| Real-Time Monitoring |
Voltage, current, active power, apparent power, energy consumption, power factor |
| Scripting Support |
mjS (JavaScript) scripting |
| Webhooks |
Up to 20 webhooks |
| Real-Time Clock |
Yes (maintains time if SNTP server unavailable) |
| Overheating Protection |
Yes |
| Optical Pulse Indicator |
Yes (LED flashes with energy usage) |
Environment
| Operating Temperature |
-20°C to 40°C (-5°F to 105°F) |
| Humidity Range |
30% to 70% RH |
| Max Altitude |
2000 m (6562 ft) |
Compliance & Warranty
| Certifications |
CE (EU Directive 2014/53/EU, 2014/35/EU, 2014/30/EU, 2011/65/EU) |
| Processor |
ESP32-D0WD (16 MB flash memory) |
| Model Number |
SPEM-002CEBEU50 |
| Manufacturer |
Shelly Europe Ltd., Bulgaria |
| Warranty |
5 years (hardware/firmware defects) |
What's in the Box
| Package Contents |
1 x Shelly Pro EM-50 meter, 2 x 50A current transformers, user guide |
Specifications are sourced from the manufacturer product page and may be updated.
