Energy Monitors · Head to head

NodOn 3CT Zigbee Energy Meter vs Shelly Pro 3EM-400

Full Smart Energy Monitors comparison in 2026

Updated November 2026
Data from the official NodOn and Shelly sites.
2026 verdict
Shelly Pro 3EM-400 has the better all-around case than NodOn 3CT Zigbee Energy Meter in 2026, starting with warranty, connectivity, and integrations.
Shelly Pro 3EM-400
Winner
Shelly Pro 3EM-400
$329.99
Buy on Amazon USA
Its strongest advantages show up in warranty, connectivity, and integrations, with data & monitoring and local control helping widen the gap. There is still a case for NodOn 3CT Zigbee Energy Meter, but mainly if its specific feature mix is what you value most. That is why Shelly Pro 3EM-400 wins the verdict here.
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FeatureNodOn 3CT Zigbee Energy MeterShelly Pro 3EM-400Winner
Warranty2 years3 yearsShelly Pro 3EM-400
ConnectivityZigbee, Other2.4 GHz WiFi, Ethernet, Bluetooth, OtherShelly Pro 3EM-400
IntegrationsHome AssistantGoogle Home, Alexa, Samsung SmartThings, Home AssistantShelly Pro 3EM-400
Data & MonitoringNoneEnergy Cost Tracking, Time-of-Use Rates, Data Export, Usage AlertsShelly Pro 3EM-400
Local ControlLocal APILocal API, MQTT, Local Web InterfaceShelly Pro 3EM-400
MeteringThree-Phase Support, Solar Net Metering, Power Factor ReadingsThree-Phase Support, Solar Net Metering, Power Factor ReadingsTie
Breaker Panel InstallYESYESTie
Smart Meter PortNONOTie
Relay OutputNONOTie
Load ManagementYESYESTie
Local ControlYESYESTie
Winner
Shelly

Shelly Pro 3EM-400

Prime exclusive deal
$329.99
Buy on Amazon USA
  • + Warranty: 3 years
  • + Connectivity: 2.4 GHz WiFi, Ethernet, Bluetooth, Other
  • + Integrations: Google Home, Alexa, Samsung SmartThings, Home Assistant

Frequently Asked Questions

Which is better overall: NodOn 3CT Zigbee Energy Meter or Shelly Pro 3EM-400?

Shelly Pro 3EM-400 has the stronger overall profile in this comparison, especially for warranty, connectivity, and integrations.

What is the biggest difference between NodOn 3CT Zigbee Energy Meter and Shelly Pro 3EM-400?

Warranty is one of the clearest differences: NodOn 3CT Zigbee Energy Meter lists 2 years, while Shelly Pro 3EM-400 lists 3 years.

Who should buy NodOn 3CT Zigbee Energy Meter?

Choose NodOn 3CT Zigbee Energy Meter if your priority is its specific strengths and that matters more than warranty.

Who should buy Shelly Pro 3EM-400?

Choose Shelly Pro 3EM-400 if your priority is warranty and connectivity and that matters more than the competing advantages.

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