Updated September 2026
Data from Amazon and official Refoss and Shelly sites.
2026 verdict
Between Shelly Pro 3EM-400 and Refoss EM16P, Shelly Pro 3EM-400 is the better overall pick in 2026, leading on rating, warranty, and connectivity.
It has the clearer edge on rating, warranty, and connectivity, and it stays ahead on integrations and data & monitoring. Choose Refoss EM16P only if price and metering matter more to you than the broader advantage from Shelly Pro 3EM-400. That is enough to make Shelly Pro 3EM-400 the better pick for most buyers.
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| Feature | Refoss EM16P | Shelly Pro 3EM-400 | Winner |
|---|---|---|---|
| Price | $169.99 | $329.99 | Refoss EM16P |
| Rating | 4.2 | 4.3 | Shelly Pro 3EM-400 |
| Warranty | 2 years | 3 years | Shelly Pro 3EM-400 |
| Metering | Split-Phase Support, Three-Phase Support, Solar Net Metering, Power Factor Readings | Three-Phase Support, Solar Net Metering, Power Factor Readings | Refoss EM16P |
| Connectivity | 2.4 GHz WiFi, Bluetooth | 2.4 GHz WiFi, Ethernet, Bluetooth, Other | Shelly Pro 3EM-400 |
| Integrations | Home Assistant | Google Home, Alexa, Samsung SmartThings, Home Assistant | Shelly Pro 3EM-400 |
| Data & Monitoring | Energy Cost Tracking, Data Export, Usage Alerts | Energy Cost Tracking, Time-of-Use Rates, Data Export, Usage Alerts | Shelly Pro 3EM-400 |
| 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 |
| Relay Output | NO | NO | Tie |
| Load Management | YES | YES | Tie |
15% OFF
$169.99
$199.99
- + Price: $169.99
- + Metering: Split-Phase Support, Three-Phase Support, Solar Net Metering, Power Factor Readings
- - Rating: 4.2 vs 4.3
- - Warranty: 2 years vs 3 years
Winner
$329.99
- + Rating: 4.3
- + Warranty: 3 years
- + Connectivity: 2.4 GHz WiFi, Ethernet, Bluetooth, Other
- - Price: $329.99 vs $169.99
- - Metering: Three-Phase Support, 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 Pro 3EM-400?
Shelly Pro 3EM-400 has the stronger overall profile in this comparison, especially for rating, warranty, and connectivity.
What is the biggest difference between Refoss EM16P and Shelly Pro 3EM-400?
Price is one of the clearest differences: Refoss EM16P lists $169.99, while Shelly Pro 3EM-400 lists $329.99.
Which one looks better on price?
Refoss EM16P is listed at $169.99, while Shelly Pro 3EM-400 is listed at $329.99. Refoss EM16P (better spec).
Who should buy Refoss EM16P?
Choose Refoss EM16P if your priority is price and metering and that matters more than rating.
Who should buy Shelly Pro 3EM-400?
Choose Shelly Pro 3EM-400 if your priority is rating and warranty and that matters more than price.
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
SonoffPOWCT
$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- Refoss
EM16P
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
CamerasShellyCamera
DisplaysShellyWall Display X1i
DisplaysShellyWall Display XL
4.2(62)$349.99
DisplaysShellyWall Display
4.4(434)18% OFF€147.56€121.33
Door & Window SensorsShellyBLU Door/Window ZB
4.6(23)$22.99- Energy MonitorsShelly
3EM-63W Gen3
4.6(137) - Energy MonitorsShelly
EM Gen3
4.6(262)$69.99 - Energy MonitorsShelly
EM Gen4
- Energy MonitorsShelly
EM Mini Gen4
4.5(120)$24.99 - Energy MonitorsShelly
Pro 3EM 3CT63
4.4(330)$150.99 - Energy MonitorsShelly
Pro 3EM-400
4.3(21)$329.99 - Energy MonitorsShelly
Pro 3EM v2
4.5(69)$154.99 - Energy MonitorsShelly
Pro EM-50
4.6(957)$119.99 
Gas DetectorsShellyGAS (CNG)
4.2(45)
Gas DetectorsShellyGAS (LPG)
LED BulbsShellyMulticolor Bulb E27 Gen3
4.3(28)
Motion SensorsShellyBLU Motion ZB
4.6(36)$26.99
Motion SensorsShellyBlu Motion
4.0(1,032)$25.99
PlugsShellyPlug M Gen3
4.5(757)$14.99
PlugsShellyPlug PM Gen3