Energy Monitors · Head to head

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

Full Smart Energy Monitors comparison in 2026

Updated October 2026
Data from Amazon and official Shelly site.
2026 verdict
Shelly 3EM-63W Gen3 edges out Shelly Pro 3EM-400 in 2026, led by price and rating.
Shelly 3EM-63W Gen3
Winner
Shelly 3EM-63W Gen3
$114.99

Last recorded price

Buy on Amazon USA
It has the clearer edge on price and rating, and it stays ahead on its broader overall balance. Choose Shelly Pro 3EM-400 only if connectivity matters more to you than the broader advantage from Shelly 3EM-63W Gen3. That is why the final call still favors Shelly 3EM-63W Gen3.
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FeatureShelly 3EM-63W Gen3Shelly Pro 3EM-400Winner
Price$114.99$329.99Shelly 3EM-63W Gen3
Rating4.54.3Shelly 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
Winner
Shelly

Shelly 3EM-63W Gen3

Prime exclusive deal
$114.99

Last recorded price

Buy on Amazon USA
  • + Price: $114.99
  • + Rating: 4.5
  • - Connectivity: 2.4 GHz WiFi, Bluetooth vs 2.4 GHz WiFi, Ethernet, Bluetooth, Other

Price history compared

Every price change of both, in the same store, so the gap between the two lines is what one costs more than the other.

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

Loading price history...

Frequently Asked Questions

Which is better overall: Shelly 3EM-63W Gen3 or Shelly Pro 3EM-400?

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

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 $114.99, while Shelly Pro 3EM-400 lists $329.99.

Which one looks better on price?

Shelly 3EM-63W Gen3 is listed at $114.99, 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 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 price.

Full comparison table

Compare all 25 Energy Monitors side by side

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  • 25 Energy Monitors
  • 46 specs compared
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