Winner
Updated October 2026
Data from Amazon and official Shelly and Zemismart sites.
2026 verdict
In 2026, the recommendation leans toward Shelly Pro EM-50 over Zemismart SPM02, driven by connectivity, integrations, and local control.
It wins the broader comparison through connectivity, integrations, and local control, while relay output and load management help confirm the result. Pick Zemismart SPM02 only when price and metering are the deciding factor for your setup. Overall, Shelly Pro EM-50 makes more sense for most people.
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| Feature | Shelly Pro EM-50 | Zemismart SPM02 | Winner |
|---|---|---|---|
| Price | $119.99 | $42.60 | Zemismart SPM02 |
| Metering | Solar Net Metering, Power Factor Readings | Three-Phase Support, Solar Net Metering | Zemismart SPM02 |
| Connectivity | 2.4 GHz WiFi, Ethernet, Bluetooth, Other | Zigbee | Shelly Pro EM-50 |
| Integrations | Google Home, Alexa, Samsung SmartThings, Home Assistant | Home Assistant | Shelly Pro EM-50 |
| Local Control | Local API, MQTT, Local Web Interface | None | Shelly Pro EM-50 |
| Relay Output | YES | NO | Shelly Pro EM-50 |
| Load Management | YES | NO | Shelly Pro EM-50 |
| Breaker Panel Install | YES | YES | Tie |
| Smart Meter Port | NO | NO | Tie |
| Data & Monitoring | Energy Cost Tracking, Time-of-Use Rates, Data Export, Usage Alerts | Usage Alerts | Tie |
Winner
$119.99
- + Connectivity: 2.4 GHz WiFi, Ethernet, Bluetooth, Other
- + Integrations: Google Home, Alexa, Samsung SmartThings, Home Assistant
- + Local Control: Local API, MQTT, Local Web Interface
- - Price: $119.99 vs $42.60
- - Metering: Solar Net Metering, Power Factor Readings vs Three-Phase Support, Solar Net Metering
40% OFF
$42.60
$70.99
- + Price: $42.60
- + Metering: Three-Phase Support, Solar Net Metering
- - Connectivity: Zigbee vs 2.4 GHz WiFi, Ethernet, Bluetooth, Other
- - Integrations: Home Assistant vs Google Home, Alexa, Samsung SmartThings, Home Assistant
Frequently Asked Questions
Which is better overall: Shelly Pro EM-50 or Zemismart SPM02?
Shelly Pro EM-50 has the stronger overall profile in this comparison, especially for connectivity, integrations, and local control.
What is the biggest difference between Shelly Pro EM-50 and Zemismart SPM02?
Price is one of the clearest differences: Shelly Pro EM-50 lists $119.99, while Zemismart SPM02 lists $42.60.
Which one looks better on price?
Shelly Pro EM-50 is listed at $119.99, while Zemismart SPM02 is listed at $42.60. Zemismart SPM02 (better spec).
Who should buy Shelly Pro EM-50?
Choose Shelly Pro EM-50 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 metering and that matters more than connectivity.
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
- 43 filters
SonoffMINI PM Matter Over WiFi Power Meter (Non-Switch)
$15.90
NodOnZigbee Smart Energy Monitor
$59.15- Shelly
Pro EM-50
$119.99 
EmporiaVue 3
$199.99
ShellyEM Gen3
$69.99
Shelly3EM-63W Gen3
16% OFF€71.28€59.99
EmporiaVue 3 3-Phase
$209.99
ShellyEM Gen4
3% OFF€67.00€65.12
SonoffPOWCT
$38.19
ShellyEM Mini Gen4
$24.99
RefossEM06P
ShellyPro 3EM v2
$154.99
ShellyPro 3EM 3CT63
$150.99
MerossEM16P
10% OFF$199.99$179.99
ShellyPro 3EM-400
$329.99
RefossEM16P
$199.99
MerossEM06P
€93.46
SonoffMINI PM Zigbee Power Meter (Non-Switch)
$15.90
AeotecHome Energy Meter 8
$95.99
RefossEM01P
CamerasShellyCamera
DisplaysShellyWall Display X1i
€188.90
DisplaysShellyWall Display XL
4.1(64)$349.99
DisplaysShellyWall Display
4.4(434)€127.99
Door & Window SensorsShellyBLU Door/Window ZB
4.5(40)- Energy MonitorsShelly
3EM-63W Gen3
4.6(137)16% OFF€71.28€59.99 - Energy MonitorsShelly
EM Gen3
4.6(268)$69.99 - Energy MonitorsShelly
EM Gen4
3% OFF€67.00€65.12 - Energy MonitorsShelly
EM Mini Gen4
4.5(135)$24.99 - Energy MonitorsShelly
Pro 3EM 3CT63
4.4(347)$150.99 - Energy MonitorsShelly
Pro 3EM-400
4.3(21)$329.99 - Energy MonitorsShelly
Pro 3EM v2
4.5(78)$154.99 - Energy MonitorsShelly
Pro EM-50
4.6(952)$119.99 
Gas DetectorsShellyGAS (CNG)
4.2(45)14% OFF€64.99€55.84
Gas DetectorsShellyGAS (LPG)
LED BulbsShellyMulticolor Bulb E27 Gen3
4.2(29)€9.90
Motion SensorsShellyBLU Motion ZB
4.5(43)$26.99
Motion SensorsShellyBlu Motion
4.0(1,034)
PlugsShellyPlug M Gen3
4.5(791)€12.90
PlugsShellyPlug PM Gen3
€25.60
Energy MonitorsZemismartSDM01
50% OFF$165.22$82.61
Energy MonitorsZemismartSPM01
40% OFF$43.33$26.00
Energy MonitorsZemismartSPM02
40% OFF$70.99$42.60
Gas DetectorsZemismartZM-GA100 Zigbee Gas Detector
30% OFF$37.14$26.00
IR Remote ControlsZemismartZMCIR01 Matter WiFi IR Thermostat
50% OFF$69.90$34.95
Window CoveringsZemismartMT03B Matter Thread Curtain Motor
$170.00