Winner
Updated November 2026
Data from the official Sonoff and Zemismart sites.
2026 verdict
SONOFF POWCT beats Zemismart SPM02 in 2026, with its clearest edge on price, integrations, and relay output.
It separates itself most clearly on price, integrations, and relay output, while still looking better on load management. You should still consider Zemismart SPM02 if metering matters more than raw overall balance. For the average buyer, SONOFF POWCT is the safer choice.
Connectivity
- Wi-Fi 2.4 GHz
vs
40% OFF
$42.60
$70.99
Works with
Connectivity
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| Feature | SONOFF POWCT | Zemismart SPM02 | Winner |
|---|---|---|---|
| Price | $38.19 | $42.60 | SONOFF POWCT |
| Metering | Solar Net Metering | Three-Phase Support, Solar Net Metering | Zemismart SPM02 |
| Integrations | Google Home, Alexa, Apple HomeKit, Samsung SmartThings, Home Assistant, Matter | 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 | Usage Alerts | Tie |
Winner
$38.19
- + Price: $38.19
- + Integrations: Google Home, Alexa, Apple HomeKit, Samsung SmartThings, Home Assistant, Matter
- + Relay Output: YES
- - Metering: Solar Net Metering vs Three-Phase Support, Solar Net Metering
40% OFF
$42.60
$70.99
- + Metering: Three-Phase Support, Solar Net Metering
- - Price: $42.60 vs $38.19
- - Integrations: Home Assistant vs Google Home, Alexa, Apple HomeKit, Samsung SmartThings, Home Assistant, Matter
Frequently Asked Questions
Which is better overall: SONOFF POWCT or Zemismart SPM02?
SONOFF POWCT has the stronger overall profile in this comparison, especially for price, integrations, and relay output.
What is the biggest difference between SONOFF POWCT and Zemismart SPM02?
Price is one of the clearest differences: SONOFF POWCT lists $38.19, while Zemismart SPM02 lists $42.60.
Which one looks better on price?
SONOFF POWCT is listed at $38.19, while Zemismart SPM02 is listed at $42.60. SONOFF POWCT (better spec).
Who should buy SONOFF POWCT?
Choose SONOFF POWCT if your priority is price and integrations and that matters more than metering.
Who should buy Zemismart SPM02?
Choose Zemismart SPM02 if your priority is metering and that matters more than price.
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