Updated November 2026
Data from the official Shelly site.
2026 verdict
Shelly EM Gen4 beats Shelly 3EM-63W Gen3 in 2026, with its clearest edge on price, rating, and connectivity.
What pushes it ahead is price, rating, and connectivity, and integrations and relay output keep the advantage from looking narrow. Pick Shelly 3EM-63W Gen3 only when metering is the deciding factor for your setup. That is why the final call still favors Shelly EM Gen4.
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| Feature | Shelly 3EM-63W Gen3 | Shelly EM Gen4 | Winner |
|---|---|---|---|
| Price | $114.99 | £63.84 | Shelly EM Gen4 |
| Rating | 4.5 | 4.8 | Shelly EM Gen4 |
| Metering | Three-Phase Support, Solar Net Metering, Power Factor Readings | Solar Net Metering, Power Factor Readings | Shelly 3EM-63W Gen3 |
| Connectivity | 2.4 GHz WiFi, Bluetooth | 2.4 GHz WiFi, Bluetooth, Zigbee | Shelly EM Gen4 |
| Integrations | Google Home, Alexa, Samsung SmartThings, Home Assistant | Google Home, Alexa, Apple HomeKit, Samsung SmartThings, Home Assistant, Matter | Shelly EM Gen4 |
| Relay Output | NO | YES | Shelly EM Gen4 |
| Warranty | 3 years | 3 years | Tie |
| Breaker Panel Install | YES | YES | Tie |
| Smart Meter Port | NO | NO | Tie |
| Data & Monitoring | Energy Cost Tracking, Time-of-Use Rates, Data Export, Usage Alerts | Energy Cost Tracking, Time-of-Use Rates, Data Export, Usage Alerts | Tie |
| Local Control | Local API, MQTT, Local Web Interface | Local API, MQTT, Local Web Interface | Tie |
| Load Management | YES | YES | Tie |
$114.99
- + Metering: Three-Phase Support, Solar Net Metering, Power Factor Readings
- - Price: $114.99 vs £63.84
- - Rating: 4.5 vs 4.8
Winner
£63.84
- + Price: £63.84
- + Rating: 4.8
- + Connectivity: 2.4 GHz WiFi, Bluetooth, Zigbee
- - Metering: Solar Net Metering, Power Factor Readings vs Three-Phase Support, Solar Net Metering, Power Factor Readings
Frequently Asked Questions
Which is better overall: Shelly 3EM-63W Gen3 or Shelly EM Gen4?
Shelly EM Gen4 has the stronger overall profile in this comparison, especially for price, rating, and connectivity.
What is the biggest difference between Shelly 3EM-63W Gen3 and Shelly EM Gen4?
Price is one of the clearest differences: Shelly 3EM-63W Gen3 lists $114.99, while Shelly EM Gen4 lists £63.84.
Which one looks better on price?
Shelly 3EM-63W Gen3 is listed at $114.99, while Shelly EM Gen4 is listed at £63.84. Shelly EM Gen4 (better spec).
Who should buy Shelly 3EM-63W Gen3?
Choose Shelly 3EM-63W Gen3 if your priority is metering and that matters more than price.
Who should buy Shelly EM Gen4?
Choose Shelly EM Gen4 if your priority is price and rating and that matters more than metering.
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