Shelly 3EM-63W Gen3 vs SONOFF POWCT comparison

Data from Amazon and 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 data & monitoring and 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.

Winner

Shelly

Shelly 3EM-63W Gen3

16% OFF

€59.99

€71.28

Buy on Amazon Germany Buy on Official Store

Sonoff

SONOFF POWCT

$38.19

Buy on Amazon USA

Feature	Shelly 3EM-63W Gen3	SONOFF POWCT	Winner
Price	€59.99	$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, Home Assistant	Google Home, Alexa, Samsung SmartThings, Home Assistant, IFTTT	SONOFF POWCT
Data & Monitoring	Energy Cost Tracking, Time-of-Use Rates, Data Export, Usage Alerts	Data Export, Usage Alerts	Shelly 3EM-63W Gen3
Local Control	Local API, MQTT, Local Web Interface	None	Shelly 3EM-63W Gen3
Relay Output	NO	YES	SONOFF POWCT
Breaker Panel Install	YES	YES	Tie
Smart Meter Port	NO	NO	Tie
Load Management	YES	YES	Tie

Winner

Shelly

Shelly 3EM-63W Gen3

16% OFF

€59.99

€71.28

Buy on Amazon Germany Buy on Official Store

+ Warranty: 3 years
+ Metering: Three-Phase Support, Solar Net Metering, Power Factor Readings
+ Connectivity: 2.4 GHz WiFi, Bluetooth
- Price: €59.99 vs $38.19
- Integrations: Google Home, Alexa, Home Assistant vs Google Home, Alexa, Samsung SmartThings, Home Assistant, IFTTT

Sonoff

SONOFF POWCT

$38.19

Buy on Amazon USA

+ Price: $38.19
+ Integrations: Google Home, Alexa, Samsung SmartThings, Home Assistant, IFTTT
+ 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 €59.99, while SONOFF POWCT lists $38.19.

Which one looks better on price?

Shelly 3EM-63W Gen3 is listed at €59.99, 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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