Energy Monitors · Head to head

Shelly 3EM-63W Gen3 vs Shelly EM Gen3

Full Smart Energy Monitors comparison in 2026

Updated September 2026
Data from Amazon and official Shelly site.
2026 verdict
Shelly 3EM-63W Gen3 beats Shelly EM Gen3 in 2026, with its clearest edge on metering.
Shelly 3EM-63W Gen3
Winner
Shelly 3EM-63W Gen3
Buy on Amazon UKCheck price
What pushes it ahead is metering, and its broader overall balance keeps the advantage from looking narrow. Pick Shelly EM Gen3 only when relay output is the deciding factor for your setup. As a general recommendation, Shelly 3EM-63W Gen3 comes out on top.
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FeatureShelly 3EM-63W Gen3Shelly EM Gen3Winner
MeteringThree-Phase Support, Solar Net Metering, Power Factor ReadingsSolar Net Metering, Power Factor ReadingsShelly 3EM-63W Gen3
Relay OutputNOYESShelly EM Gen3
Rating4.64.6Tie
Warranty3 years3 yearsTie
Breaker Panel InstallYESYESTie
Smart Meter PortNONOTie
Connectivity2.4 GHz WiFi, Bluetooth2.4 GHz WiFi, BluetoothTie
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
Load ManagementYESYESTie

Frequently Asked Questions

Which is better overall: Shelly 3EM-63W Gen3 or Shelly EM Gen3?

Shelly 3EM-63W Gen3 has the stronger overall profile in this comparison, especially for metering.

What is the biggest difference between Shelly 3EM-63W Gen3 and Shelly EM Gen3?

Metering is one of the clearest differences: Shelly 3EM-63W Gen3 lists Three-Phase Support, Solar Net Metering, Power Factor Readings, while Shelly EM Gen3 lists Solar Net Metering, Power Factor Readings.

Who should buy Shelly 3EM-63W Gen3?

Choose Shelly 3EM-63W Gen3 if your priority is metering and that matters more than relay output.

Who should buy Shelly EM Gen3?

Choose Shelly EM Gen3 if your priority is relay output and that matters more than metering.

Full comparison table

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