Winner
Updated October 2026
Data from Amazon and official Sonoff and Zemismart sites.
2026 verdict
SONOFF POWCT beats Zemismart SPM01 in 2026, with its clearest edge on integrations, relay output, and load management.
It separates itself most clearly on integrations, relay output, and load management, while still looking better on its broader overall balance. You should still consider Zemismart SPM01 if price and metering matter more than raw overall balance. That makes SONOFF POWCT the clearer recommendation in 2026.
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| Feature | SONOFF POWCT | Zemismart SPM01 | Winner |
|---|---|---|---|
| Price | $38.19 | $26.00 | Zemismart SPM01 |
| Metering | Solar Net Metering | Solar Net Metering, Power Factor Readings | Zemismart SPM01 |
| Integrations | Google Home, Alexa, Apple HomeKit, Samsung SmartThings, Home Assistant, Matter | Samsung SmartThings, Home Assistant | SONOFF POWCT |
| Relay Output | YES | NO | SONOFF POWCT |
| Load Management | YES | NO | SONOFF POWCT |
| Breaker Panel Install | YES | YES | Tie |
| Smart Meter Port | NO | NO | Tie |
| Connectivity | 2.4 GHz WiFi | Zigbee | Tie |
| Data & Monitoring | Data Export, Usage Alerts | None | Tie |
Winner
$38.19
- + Integrations: Google Home, Alexa, Apple HomeKit, Samsung SmartThings, Home Assistant, Matter
- + Relay Output: YES
- + Load Management: YES
- - Price: $38.19 vs $26.00
- - Metering: Solar Net Metering vs Solar Net Metering, Power Factor Readings
40% OFF
$26.00
$43.33
- + Price: $26.00
- + Metering: Solar Net Metering, Power Factor Readings
- - Integrations: Samsung SmartThings, Home Assistant vs Google Home, Alexa, Apple HomeKit, Samsung SmartThings, Home Assistant, Matter
- - Relay Output: NO vs YES
Frequently Asked Questions
Which is better overall: SONOFF POWCT or Zemismart SPM01?
SONOFF POWCT has the stronger overall profile in this comparison, especially for integrations, relay output, and load management.
What is the biggest difference between SONOFF POWCT and Zemismart SPM01?
Price is one of the clearest differences: SONOFF POWCT lists $38.19, while Zemismart SPM01 lists $26.00.
Which one looks better on price?
SONOFF POWCT is listed at $38.19, while Zemismart SPM01 is listed at $26.00. Zemismart SPM01 (better spec).
Who should buy SONOFF POWCT?
Choose SONOFF POWCT if your priority is integrations and relay output and that matters more than price.
Who should buy Zemismart SPM01?
Choose Zemismart SPM01 if your priority is price and metering and that matters more than integrations.
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
ShellyPro 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- Sonoff
POWCT
$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
Air Quality MonitorsSonoffSAWF-07P Air Quality Monitor
3.7(193)$39.90
Air Quality MonitorsSonoffSAWF-08P Air Quality Monitor
4.3(169)$49.90
CamerasSonoffCAM GlassView
4.4(30)$34.90
CamerasSonoffCam Outdoor DUO
$79.90
CamerasSonoffCam Slim Gen2
4.4(176)$19.90
CamerasSonoffGK-200MP2-B
4.0(149)
DisplaysSonoffNSPanel Pro Gen2
3.4(11)€149.90
DisplaysSonoffNSPanel Pro
4.1(75)$129.90
DonglesSonoffDongle Lite MG21
4.5(452)
DonglesSonoffDongle Max
4.3(603)18% OFF
€38.99€32.13
DonglesSonoffDongle Plus MG24
4.7(690)$38.35
DonglesSonoffDongle Plus PP10
4.6(99)$35.90
DonglesSonoffDongle-PZG23
4.6(175)$39.90
DonglesSonoffZ-Wave 800 PoE Dongle Max
4.5(26)$44.90
DonglesSonoffZBDongle-E
4.7(3,743)$24.90
DonglesSonoffZBDongle-P
4.6(5,678)16% OFF$39.99$33.47
Door & Window SensorsSonoffDW2-WIFI
3.8(1,058)
Door & Window SensorsSonoffSNZB-04 ZigBee Wireless Door/Window Sensor
3.7(101)
Door & Window SensorsSonoffSNZB-04P ZigBee Door/Window Sensor
4.0(13)
Door & Window SensorsSonoffSenseGuard DW Gen2
4.4(203)€40.91
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