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Energy Monitors · Head to head

NodOn Zigbee Smart Energy Monitor 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
In 2026, the recommendation leans toward Shelly EM Gen3 over NodOn Zigbee Smart Energy Monitor, driven by warranty, connectivity, and integrations.
Shelly EM Gen3
Winner
Shelly EM Gen3
$69.99
Buy on Amazon USACheck price
Its clearest strengths are warranty, connectivity, and integrations, and it still looks stronger on data & monitoring and local control. Pick NodOn Zigbee Smart Energy Monitor only when rating is the deciding factor for your setup. That is enough to make Shelly EM Gen3 the better pick for most buyers.
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FeatureNodOn Zigbee Smart Energy MonitorShelly EM Gen3Winner
Rating4.74.6NodOn Zigbee Smart Energy Monitor
Warranty2 years3 yearsShelly EM Gen3
ConnectivityZigbee2.4 GHz WiFi, BluetoothShelly EM Gen3
IntegrationsSamsung SmartThings, Home AssistantGoogle Home, Alexa, Samsung SmartThings, Home AssistantShelly EM Gen3
Data & MonitoringNoneEnergy Cost Tracking, Time-of-Use Rates, Data Export, Usage AlertsShelly EM Gen3
Local ControlNoneLocal API, MQTT, Local Web InterfaceShelly EM Gen3
Relay OutputNOYESShelly EM Gen3
MeteringSolar Net Metering, Power Factor ReadingsSolar Net Metering, Power Factor ReadingsTie
Breaker Panel InstallYESYESTie
Smart Meter PortNONOTie
Load ManagementYESYESTie

Frequently Asked Questions

Which is better overall: NodOn Zigbee Smart Energy Monitor or Shelly EM Gen3?

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

What is the biggest difference between NodOn Zigbee Smart Energy Monitor and Shelly EM Gen3?

Rating is one of the clearest differences: NodOn Zigbee Smart Energy Monitor lists 4.7, while Shelly EM Gen3 lists 4.6.

Who should buy NodOn Zigbee Smart Energy Monitor?

Choose NodOn Zigbee Smart Energy Monitor if your priority is rating and that matters more than warranty.

Who should buy Shelly EM Gen3?

Choose Shelly EM Gen3 if your priority is warranty and connectivity and that matters more than rating.

Full comparison table

Compare all 25 Energy Monitors side by side

You are looking at two of them. The full table lines up all Energy Monitors in the catalog with the same specs, so you can filter by what you need and sort by price or rating.

  • 25 Energy Monitors
  • 46 specs compared
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