Winner
Updated September 2026
Data from Amazon and official Refoss and Zemismart sites.
2026 verdict
Refoss EM16P wins the 2026 matchup against Zemismart SDM01, mainly on metering, connectivity, and data & monitoring.
The main reason it wins is metering, connectivity, and data & monitoring, and local control and load management strengthen that case. Choose Zemismart SDM01 only if price matters more to you than the broader advantage from Refoss EM16P. That is why the final call still favors Refoss EM16P.
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| Feature | Refoss EM16P | Zemismart SDM01 | Winner |
|---|---|---|---|
| Price | $169.99 | $82.61 | Zemismart SDM01 |
| 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 | Zigbee | Refoss EM16P |
| Data & Monitoring | Energy Cost Tracking, Data Export, Usage Alerts | Usage Alerts | Refoss EM16P |
| Local Control | Local API, MQTT, Local Web Interface | None | Refoss EM16P |
| Load Management | YES | NO | Refoss EM16P |
| Breaker Panel Install | YES | YES | Tie |
| Smart Meter Port | NO | NO | Tie |
| Integrations | Home Assistant | Home Assistant | Tie |
| Relay Output | NO | NO | Tie |
Winner
15% OFF
$169.99
$199.99
- + Metering: Split-Phase Support, Three-Phase Support, Solar Net Metering, Power Factor Readings
- + Connectivity: 2.4 GHz WiFi, Bluetooth
- + Data & Monitoring: Energy Cost Tracking, Data Export, Usage Alerts
- - Price: $169.99 vs $82.61
50% OFF
$82.61
$165.22
- + Price: $82.61
- - Metering: Three-Phase Support, Solar Net Metering, Power Factor Readings vs Split-Phase Support, Three-Phase Support, Solar Net Metering, Power Factor Readings
- - Connectivity: Zigbee vs 2.4 GHz WiFi, Bluetooth
Frequently Asked Questions
Which is better overall: Refoss EM16P or Zemismart SDM01?
Refoss EM16P has the stronger overall profile in this comparison, especially for metering, connectivity, and data & monitoring.
What is the biggest difference between Refoss EM16P and Zemismart SDM01?
Price is one of the clearest differences: Refoss EM16P lists $169.99, while Zemismart SDM01 lists $82.61.
Which one looks better on price?
Refoss EM16P is listed at $169.99, while Zemismart SDM01 is listed at $82.61. Zemismart SDM01 (better spec).
Who should buy Refoss EM16P?
Choose Refoss EM16P if your priority is metering and connectivity and that matters more than price.
Who should buy Zemismart SDM01?
Choose Zemismart SDM01 if your priority is price and that matters more than metering.
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
