Winner
Updated November 2026
Data from the official Shelly and Sonoff sites.
2026 verdict
Across the 2026 comparison, Shelly 3EM-63W Gen3 earns the nod over SONOFF POWCT on the strength of warranty, metering, and connectivity.
It has the clearer edge on warranty, metering, and connectivity, and it stays ahead on local control. SONOFF POWCT is the better fit only for buyers who prioritize price, integrations, and relay output above everything else here. Overall, Shelly 3EM-63W Gen3 makes more sense for most people.
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| Feature | Shelly 3EM-63W Gen3 | SONOFF POWCT | Winner |
|---|---|---|---|
| Price | $114.99 | $38.19 | SONOFF POWCT |
| Warranty | 3 years | 1 year | Shelly 3EM-63W Gen3 |
| Metering | Three-Phase Support, Solar Net Metering, Power Factor Readings | Solar Net Metering | Shelly 3EM-63W Gen3 |
| Connectivity | 2.4 GHz WiFi, Bluetooth | 2.4 GHz WiFi | Shelly 3EM-63W Gen3 |
| Integrations | Google Home, Alexa, Samsung SmartThings, Home Assistant | Google Home, Alexa, Apple HomeKit, Samsung SmartThings, Home Assistant, Matter | SONOFF POWCT |
| Local Control | Local API, MQTT, Local Web Interface | None | Shelly 3EM-63W Gen3 |
| Relay Output | NO | YES | SONOFF POWCT |
| Rating | 4.5 | 4.5 | Tie |
| 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 | Data Export, Usage Alerts | Tie |
| Load Management | YES | YES | Tie |
Winner
$114.99
- + Warranty: 3 years
- + Metering: Three-Phase Support, Solar Net Metering, Power Factor Readings
- + Connectivity: 2.4 GHz WiFi, Bluetooth
- - Price: $114.99 vs $38.19
- - Integrations: Google Home, Alexa, Samsung SmartThings, Home Assistant vs Google Home, Alexa, Apple HomeKit, Samsung SmartThings, Home Assistant, Matter
$38.19
- + Price: $38.19
- + Integrations: Google Home, Alexa, Apple HomeKit, Samsung SmartThings, Home Assistant, Matter
- + Relay Output: YES
- - Warranty: 1 year vs 3 years
- - Metering: Solar Net Metering vs Three-Phase Support, Solar Net Metering, Power Factor Readings
Frequently Asked Questions
Which is better overall: Shelly 3EM-63W Gen3 or SONOFF POWCT?
Shelly 3EM-63W Gen3 has the stronger overall profile in this comparison, especially for warranty, metering, and connectivity.
What is the biggest difference between Shelly 3EM-63W Gen3 and SONOFF POWCT?
Price is one of the clearest differences: Shelly 3EM-63W Gen3 lists $114.99, while SONOFF POWCT lists $38.19.
Which one looks better on price?
Shelly 3EM-63W Gen3 is listed at $114.99, while SONOFF POWCT is listed at $38.19. SONOFF POWCT (better spec).
Who should buy Shelly 3EM-63W Gen3?
Choose Shelly 3EM-63W Gen3 if your priority is warranty and metering and that matters more than price.
Who should buy SONOFF POWCT?
Choose SONOFF POWCT if your priority is price and integrations and that matters more than warranty.
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