Winner
Updated September 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, data & monitoring, and relay output.
It separates itself most clearly on integrations, data & monitoring, and relay output, while still looking better on load management. 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.
Price alerts
Energy Monitor prices change while you decide
We check the price of every Energy Monitor in the catalog daily and email you the drops, whichever one you pick.
| 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 |
| Data & Monitoring | Data Export, Usage Alerts | None | 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 |
Winner
- + Integrations: Google Home, Alexa, Apple HomeKit, Samsung SmartThings, Home Assistant, Matter
- + Data & Monitoring: Data Export, Usage Alerts
- + Relay Output: 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
- - Data & Monitoring: None vs Data Export, Usage Alerts
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, data & monitoring, and relay output.
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 data & monitoring 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 23 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.
- 23 Energy Monitors
- 46 specs compared
- 43 filters
SonoffMINI PM Matter Over WiFi Power Meter (Non-Switch)
$15.90
ShellyPro EM-50
$119.99
EmporiaVue 3
$199.99
ShellyEM Gen3
$69.99
Shelly3EM-63W Gen3
EmporiaVue 3 3-Phase
$209.99
RefossEM01P
16% OFF$82.99$69.99
ShellyEM Gen4
- Sonoff
POWCT
$38.19 
ShellyEM Mini Gen4
$24.99
RefossEM06P
ShellyPro 3EM v2
$154.99
ShellyPro 3EM 3CT63
$150.99
MerossEM16P
20% OFF$199.99$159.98
ShellyPro 3EM-400
$329.99
RefossEM16P
15% OFF$199.99$169.99
MerossEM06P
AeotecHome Energy Meter 8
$95.99
SonoffMINI PM Zigbee Power Meter (Non-Switch)
$15.90
EmporiaVue Utility Connect
$39.99
Air Quality MonitorsSonoffSAWF-07P Air Quality Monitor
3.7(188)$39.90
Air Quality MonitorsSonoffSAWF-08P Air Quality Monitor
4.3(169)$49.90
CamerasSonoffCAM GlassView
4.4(10)$34.90
CamerasSonoffCam Outdoor DUO
$79.90
CamerasSonoffCam Slim Gen2
4.4(170)$19.90
CamerasSonoffGK-200MP2-B
4.0(149)30% OFF$9.99$6.99
DisplaysSonoffNSPanel Pro Gen2
3.3(10)€149.90
DisplaysSonoffNSPanel Pro
4.1(72)$129.90
DonglesSonoffDongle Lite MG21
4.5(436)$24.90
DonglesSonoffDongle Max
4.3(595)
DonglesSonoffDongle Plus MG24
4.7(669)$35.90
DonglesSonoffDongle Plus PP10
4.6(78)$35.90
DonglesSonoffDongle-PZG23
4.6(171)10% OFF$39.90$35.91
DonglesSonoffZBDongle-E
4.6(3,729)$24.90
DonglesSonoffZBDongle-P
4.6(5,671)15% OFF$39.99$33.96
Door & Window SensorsSonoffDW2-WIFI
3.8(1,061)$12.23
Door & Window SensorsSonoffSNZB-04 ZigBee Wireless Door/Window Sensor
3.7(101)$17.99
Door & Window SensorsSonoffSNZB-04P ZigBee Door/Window Sensor
4.0(13)$18.99
Door & Window SensorsSonoffSenseGuard DW Gen2
4.4(185)- Energy MonitorsSonoff
MINI PM Matter Over WiFi Power Meter (Non-Switch)
5.0(1)$15.90
