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Energy Monitors · Head to head

NodOn 3CT Zigbee Energy Meter vs Shelly EM Gen3

Full Smart Energy Monitors comparison in 2026

Updated September 2026
Data from Amazon and official NodOn and Shelly sites.
2026 verdict
Shelly EM Gen3 beats NodOn 3CT Zigbee Energy Meter in 2026, with its clearest edge on warranty, integrations, and data & monitoring.
Shelly EM Gen3
Winner
Shelly EM Gen3
$69.99
Buy on Amazon USACheck price
It separates itself most clearly on warranty, integrations, and data & monitoring, while still looking better on local control and relay output. Pick NodOn 3CT Zigbee Energy Meter only when metering is the deciding factor for your setup. In practical terms, Shelly EM Gen3 is the easier product to recommend.
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FeatureNodOn 3CT Zigbee Energy MeterShelly EM Gen3Winner
Warranty2 years3 yearsShelly EM Gen3
MeteringThree-Phase Support, Solar Net Metering, Power Factor ReadingsSolar Net Metering, Power Factor ReadingsNodOn 3CT Zigbee Energy Meter
IntegrationsHome AssistantGoogle Home, Alexa, Samsung SmartThings, Home AssistantShelly EM Gen3
Data & MonitoringNoneEnergy Cost Tracking, Time-of-Use Rates, Data Export, Usage AlertsShelly EM Gen3
Local ControlLocal APILocal API, MQTT, Local Web InterfaceShelly EM Gen3
Relay OutputNOYESShelly EM Gen3
Breaker Panel InstallYESYESTie
Smart Meter PortNONOTie
ConnectivityZigbee, Other2.4 GHz WiFi, BluetoothTie
Load ManagementYESYESTie
Winner
Shelly

Shelly EM Gen3

$69.99
Buy on Amazon USACheck price
  • + Warranty: 3 years
  • + Integrations: Google Home, Alexa, Samsung SmartThings, Home Assistant
  • + Data & Monitoring: Energy Cost Tracking, Time-of-Use Rates, Data Export, Usage Alerts
  • - Metering: Solar Net Metering, Power Factor Readings vs Three-Phase Support, Solar Net Metering, Power Factor Readings

Frequently Asked Questions

Which is better overall: NodOn 3CT Zigbee Energy Meter or Shelly EM Gen3?

Shelly EM Gen3 has the stronger overall profile in this comparison, especially for warranty, integrations, and data & monitoring.

What is the biggest difference between NodOn 3CT Zigbee Energy Meter and Shelly EM Gen3?

Warranty is one of the clearest differences: NodOn 3CT Zigbee Energy Meter lists 2 years, while Shelly EM Gen3 lists 3 years.

Who should buy NodOn 3CT Zigbee Energy Meter?

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

Who should buy Shelly EM Gen3?

Choose Shelly EM Gen3 if your priority is warranty and integrations and that matters more than metering.

Full comparison table

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  • 25 Energy Monitors
  • 46 specs compared
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