Energy Monitors · Head to head

Shelly EM Gen3 vs Zemismart SPM02

Full Smart Energy Monitors comparison in 2026

Data from Amazon and official Shelly and Zemismart sites.
2026 verdict
For most buyers in 2026, Shelly EM Gen3 is the safer pick over Zemismart SPM02 because of connectivity, integrations, and data & monitoring. What pushes it ahead is connectivity, integrations, and data & monitoring, and local control and relay output keep the advantage from looking narrow. Choose Zemismart SPM02 only if price matters more to you than the broader advantage from Shelly EM Gen3. That is enough to make Shelly EM Gen3 the better pick for most buyers.
vs
FeatureShelly EM Gen3Zemismart SPM02Winner
Price$69.99$42.60Zemismart SPM02
Connectivity2.4 GHz WiFi, BluetoothZigbeeShelly EM Gen3
IntegrationsGoogle Home, Alexa, Samsung SmartThings, Home AssistantHome AssistantShelly EM Gen3
Data & MonitoringEnergy Cost Tracking, Time-of-Use Rates, Data Export, Usage AlertsUsage AlertsShelly EM Gen3
Local ControlLocal API, MQTT, Local Web InterfaceNoneShelly EM Gen3
Relay OutputYESNOShelly EM Gen3
Load ManagementYESNOShelly EM Gen3
MeteringSolar Net Metering, Power Factor ReadingsThree-Phase Support, Solar Net MeteringTie
Breaker Panel InstallYESYESTie
Smart Meter PortNONOTie

Frequently Asked Questions

Which is better overall: Shelly EM Gen3 or Zemismart SPM02?

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

What is the biggest difference between Shelly EM Gen3 and Zemismart SPM02?

Price is one of the clearest differences: Shelly EM Gen3 lists $69.99, while Zemismart SPM02 lists $42.60.

Which one looks better on price?

Shelly EM Gen3 is listed at $69.99, while Zemismart SPM02 is listed at $42.60. Zemismart SPM02 (better spec).

Who should buy Shelly EM Gen3?

Choose Shelly EM Gen3 if your priority is connectivity and integrations and that matters more than price.

Who should buy Zemismart SPM02?

Choose Zemismart SPM02 if your priority is price and that matters more than connectivity.

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