Refoss EM16P vs Shelly EM Gen4 comparison

Data from Amazon and official Refoss and Shelly sites.

2026 verdict

For most buyers in 2026, Shelly EM Gen4 is the safer pick over Refoss EM16P because of rating, warranty, and connectivity. It separates itself most clearly on rating, warranty, and connectivity, while still looking better on integrations and data & monitoring. The only strong reason to choose Refoss EM16P is if metering is more important to you than the overall verdict. That keeps the verdict firmly in favor of Shelly EM Gen4.

Refoss

Refoss EM16P

25% OFF

$179.99

$239.99

Buy on Amazon USA

Winner

Shelly

Shelly EM Gen4

Price unavailable right now

Buy on Amazon Germany Buy on Official Store

Feature	Refoss EM16P	Shelly EM Gen4	Winner
Rating	4.3	4.7	Shelly EM Gen4
Warranty	2 years	3 years	Shelly EM Gen4
Metering	Split-Phase Support, Three-Phase Support, Solar Net Metering, Power Factor Readings	Solar Net Metering, Power Factor Readings	Refoss EM16P
Connectivity	2.4 GHz WiFi, Bluetooth	2.4 GHz WiFi, Bluetooth, Zigbee	Shelly EM Gen4
Integrations	Home Assistant	Google Home, Alexa, Apple HomeKit, Samsung SmartThings, Home Assistant, Matter	Shelly EM Gen4
Data & Monitoring	Energy Cost Tracking, Data Export, Usage Alerts	Energy Cost Tracking, Time-of-Use Rates, Data Export, Usage Alerts	Shelly EM Gen4
Relay Output	NO	YES	Shelly EM Gen4
Breaker Panel Install	YES	YES	Tie
Smart Meter Port	NO	NO	Tie
Local Control	Local API, MQTT, Local Web Interface	Local API, MQTT, Local Web Interface	Tie
Load Management	YES	YES	Tie

Refoss

Refoss EM16P

25% OFF

$179.99

$239.99

Buy on Amazon USA

+ Metering: Split-Phase Support, Three-Phase Support, Solar Net Metering, Power Factor Readings
- Rating: 4.3 vs 4.7
- Warranty: 2 years vs 3 years

Winner

Shelly

Shelly EM Gen4

Price unavailable right now

Buy on Amazon Germany Buy on Official Store

+ Rating: 4.7
+ Warranty: 3 years
+ Connectivity: 2.4 GHz WiFi, Bluetooth, Zigbee
- Metering: Solar Net Metering, Power Factor Readings vs Split-Phase Support, Three-Phase Support, Solar Net Metering, Power Factor Readings

Frequently Asked Questions

Which is better overall: Refoss EM16P or Shelly EM Gen4?

Shelly EM Gen4 has the stronger overall profile in this comparison, especially for rating, warranty, and connectivity.

What is the biggest difference between Refoss EM16P and Shelly EM Gen4?

Rating is one of the clearest differences: Refoss EM16P lists 4.3, while Shelly EM Gen4 lists 4.7.

Who should buy Refoss EM16P?

Choose Refoss EM16P if your priority is metering and that matters more than rating.

Who should buy Shelly EM Gen4?

Choose Shelly EM Gen4 if your priority is rating and warranty and that matters more than metering.

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