Data from Amazon and official Shelly site.
2026 verdict
Shelly Pro 3EM-400 edges out Shelly 3EM-63W Gen3 in 2026, led by connectivity. It has the clearer edge on connectivity, and it stays ahead on its broader overall balance. Choose Shelly 3EM-63W Gen3 only if price matters more to you than the broader advantage from Shelly Pro 3EM-400. That is why the final call still favors Shelly Pro 3EM-400.
| Feature | Shelly 3EM-63W Gen3 | Shelly Pro 3EM-400 | Winner |
|---|---|---|---|
| Price | €59.99 | $329.99 | Shelly 3EM-63W Gen3 |
| Connectivity | 2.4 GHz WiFi, Bluetooth | 2.4 GHz WiFi, Ethernet, Bluetooth, Other | Shelly Pro 3EM-400 |
| Warranty | 3 years | 3 years | Tie |
| Metering | Three-Phase Support, Solar Net Metering, Power Factor Readings | Three-Phase Support, Solar Net Metering, Power Factor Readings | Tie |
| Breaker Panel Install | YES | YES | Tie |
| Smart Meter Port | NO | NO | Tie |
| Integrations | Google Home, Alexa, Home Assistant | Google Home, Alexa, Home Assistant | 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 |
| Relay Output | NO | NO | Tie |
| Load Management | YES | YES | Tie |
16% OFF
€59.99
€71.28
- + Price: €59.99
- - Connectivity: 2.4 GHz WiFi, Bluetooth vs 2.4 GHz WiFi, Ethernet, Bluetooth, Other
Winner
$329.99
- + Connectivity: 2.4 GHz WiFi, Ethernet, Bluetooth, Other
- - Price: $329.99 vs €59.99
Frequently Asked Questions
Which is better overall: Shelly 3EM-63W Gen3 or Shelly Pro 3EM-400?
Shelly Pro 3EM-400 has the stronger overall profile in this comparison, especially for connectivity.
What is the biggest difference between Shelly 3EM-63W Gen3 and Shelly Pro 3EM-400?
Price is one of the clearest differences: Shelly 3EM-63W Gen3 lists €59.99, while Shelly Pro 3EM-400 lists $329.99.
Which one looks better on price?
Shelly 3EM-63W Gen3 is listed at €59.99, while Shelly Pro 3EM-400 is listed at $329.99. Shelly 3EM-63W Gen3 (better spec).
Who should buy Shelly 3EM-63W Gen3?
Choose Shelly 3EM-63W Gen3 if your priority is price and that matters more than connectivity.
Who should buy Shelly Pro 3EM-400?
Choose Shelly Pro 3EM-400 if your priority is connectivity and that matters more than price.
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