Energy Monitors · Head to head

Shelly 3EM-63W Gen3 vs Shelly Pro 3EM-400

Full Smart Energy Monitors comparison in 2026

Updated September 2026
Data from Amazon and official Shelly site.
2026 verdict
Shelly Pro 3EM-400 edges out Shelly 3EM-63W Gen3 in 2026, led by connectivity.
Shelly Pro 3EM-400
Winner
Shelly Pro 3EM-400
$329.99
Buy on Amazon USACheck price
It has the clearer edge on connectivity, and it stays ahead on its broader overall balance. Choose Shelly 3EM-63W Gen3 only if rating 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.
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FeatureShelly 3EM-63W Gen3Shelly Pro 3EM-400Winner
Rating4.64.3Shelly 3EM-63W Gen3
Connectivity2.4 GHz WiFi, Bluetooth2.4 GHz WiFi, Ethernet, Bluetooth, OtherShelly Pro 3EM-400
Warranty3 years3 yearsTie
MeteringThree-Phase Support, Solar Net Metering, Power Factor ReadingsThree-Phase Support, Solar Net Metering, Power Factor ReadingsTie
Breaker Panel InstallYESYESTie
Smart Meter PortNONOTie
IntegrationsGoogle Home, Alexa, Samsung SmartThings, Home AssistantGoogle Home, Alexa, Samsung SmartThings, Home AssistantTie
Data & MonitoringEnergy Cost Tracking, Time-of-Use Rates, Data Export, Usage AlertsEnergy Cost Tracking, Time-of-Use Rates, Data Export, Usage AlertsTie
Local ControlLocal API, MQTT, Local Web InterfaceLocal API, MQTT, Local Web InterfaceTie
Relay OutputNONOTie
Load ManagementYESYESTie

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?

Rating is one of the clearest differences: Shelly 3EM-63W Gen3 lists 4.6, while Shelly Pro 3EM-400 lists 4.3.

Who should buy Shelly 3EM-63W Gen3?

Choose Shelly 3EM-63W Gen3 if your priority is rating 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 rating.

Full comparison table

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  • 46 specs compared
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