Shelly EM Gen3 vs Zemismart SPM01 comparison

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 SPM01 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 SPM01 only if price matters more to you than the broader advantage from Shelly EM Gen3. In practical terms, Shelly EM Gen3 is the easier product to recommend.

Winner

Shelly

Shelly EM Gen3

$69.99

Buy on Amazon USA

Zemismart

Zemismart SPM01

40% OFF

$26.00

$43.33

Buy on Official Store

Feature	Shelly EM Gen3	Zemismart SPM01	Winner
Price	$69.99	$26.00	Zemismart SPM01
Connectivity	2.4 GHz WiFi, Bluetooth	Zigbee	Shelly EM Gen3
Integrations	Google Home, Alexa, Samsung SmartThings, Home Assistant	Samsung SmartThings, Home Assistant	Shelly EM Gen3
Data & Monitoring	Energy Cost Tracking, Time-of-Use Rates, Data Export, Usage Alerts	None	Shelly EM Gen3
Local Control	Local API, MQTT, Local Web Interface	None	Shelly EM Gen3
Relay Output	YES	NO	Shelly EM Gen3
Load Management	YES	NO	Shelly EM Gen3
Metering	Solar Net Metering, Power Factor Readings	Solar Net Metering, Power Factor Readings	Tie
Breaker Panel Install	YES	YES	Tie
Smart Meter Port	NO	NO	Tie

Winner

Shelly

Shelly EM Gen3

$69.99

Buy on Amazon USA

+ Connectivity: 2.4 GHz WiFi, Bluetooth
+ Integrations: Google Home, Alexa, Samsung SmartThings, Home Assistant
+ Data & Monitoring: Energy Cost Tracking, Time-of-Use Rates, Data Export, Usage Alerts
- Price: $69.99 vs $26.00

Zemismart

Zemismart SPM01

40% OFF

$26.00

$43.33

Buy on Official Store

+ Price: $26.00
- Connectivity: Zigbee vs 2.4 GHz WiFi, Bluetooth
- Integrations: Samsung SmartThings, Home Assistant vs Google Home, Alexa, Samsung SmartThings, Home Assistant

Frequently Asked Questions

Which is better overall: Shelly EM Gen3 or Zemismart SPM01?

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 SPM01?

Price is one of the clearest differences: Shelly EM Gen3 lists $69.99, while Zemismart SPM01 lists $26.00.

Which one looks better on price?

Shelly EM Gen3 is listed at $69.99, while Zemismart SPM01 is listed at $26.00. Zemismart SPM01 (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 SPM01?

Choose Zemismart SPM01 if your priority is price and that matters more than connectivity.

More Energy Monitors

Top Energy Monitors to compare next

Compare smart energy monitors by monitored circuits, CT sensor ratings, accuracy, solar net metering, three-phase support, local API and integrations.

Compare Energy Monitors