Winner
20% OFF
Prime exclusive deal$55.99
$69.99
Join Prime to buy it at $55.99
Join Prime to buy it at C$78.96
Updated October 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 local control.
What pushes it ahead is connectivity, integrations, and local control, and relay output and load management keep the advantage from looking narrow. Choose Zemismart SPM02 only if price and metering matter 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
40% OFF
$42.60
$70.99
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| Feature | Shelly EM Gen3 | Zemismart SPM02 | Winner |
|---|---|---|---|
| Price | $55.99 | $42.60 | Zemismart SPM02 |
| Metering | Solar Net Metering, Power Factor Readings | Three-Phase Support, Solar Net Metering | Zemismart SPM02 |
| Connectivity | 2.4 GHz WiFi, Bluetooth | Zigbee | Shelly EM Gen3 |
| Integrations | Google Home, Alexa, Samsung SmartThings, Home Assistant | Home Assistant | 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 |
| 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
20% OFF
Prime exclusive deal$55.99
$69.99
- + Connectivity: 2.4 GHz WiFi, Bluetooth
- + Integrations: Google Home, Alexa, Samsung SmartThings, Home Assistant
- + Local Control: Local API, MQTT, Local Web Interface
- - Price: $55.99 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, Bluetooth
- - Integrations: Home Assistant vs Google Home, Alexa, Samsung SmartThings, Home Assistant
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 local control.
What is the biggest difference between Shelly EM Gen3 and Zemismart SPM02?
Price is one of the clearest differences: Shelly EM Gen3 lists $55.99, while Zemismart SPM02 lists $42.60.
Which one looks better on price?
Shelly EM Gen3 is listed at $55.99, 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 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
$61.27
ShellyPro EM-50
$119.99
EmporiaVue 3
$199.99- Shelly
EM Gen3
20% OFF$69.99$55.99 
Shelly3EM-63W Gen3
20% OFF$114.99$91.99
EmporiaVue 3 3-Phase
$209.99
ShellyEM Gen4
3% OFF€67.00€65.12
SonoffPOWCT
20% OFF$38.19$30.55
ShellyEM Mini Gen4
20% OFF$24.99$19.99
RefossEM06P
Unavailable
ShellyPro 3EM v2
$154.99
ShellyPro 3EM 3CT63
20% OFF$150.99$120.79
MerossEM16P
20% OFF$199.99$159.99
ShellyPro 3EM-400
20% OFF$329.99$263.99
RefossEM16P
24% OFF$199.99$151.98
MerossEM06P
€94.99
SonoffMINI PM Zigbee Power Meter (Non-Switch)
20% OFF$15.90$12.72
AeotecHome Energy Meter 8
15% OFF$95.99$81.59
RefossEM01P
Unavailable
CamerasShellyCamera
DisplaysShellyWall Display X1i
€188.90
DisplaysShellyWall Display XL
4.1(64)20% OFF$349.99$279.99
DisplaysShellyWall Display
4.4(434)€126.53
Door & Window SensorsShellyBLU Door/Window Outdoor ZB
Door & Window SensorsShellyBLU Door/Window ZB
4.5(40)Unavailable- Energy MonitorsShelly
3EM-63W Gen3
4.6(137)20% OFF$114.99$91.99 - Energy MonitorsShelly
EM Gen3
4.6(268)20% OFF$69.99$55.99 - Energy MonitorsShelly
EM Gen4
3% OFF€67.00€65.12 - Energy MonitorsShelly
EM Mini Gen4
4.5(135)20% OFF$24.99$19.99 - Energy MonitorsShelly
Pro 3EM 3CT63
4.4(347)20% OFF$150.99$120.79 - Energy MonitorsShelly
Pro 3EM-400
4.3(21)20% OFF$329.99$263.99 - 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)Last priceMay 1, 2026$25.99
Unavailable
PlugsShellyPlug M Gen3
4.5(791)€12.90
Energy MonitorsZemismartSDM01
50% OFF$165.22$82.61
Energy MonitorsZemismartSPM01
40% OFF$43.33$26.00- Energy MonitorsZemismart
SPM02
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
Window CoveringsZemismartZM25WB WiFi Rechargeable Roller Shade Motor
40% OFF$103.33$62.00