Winner
24% OFF
Prime exclusive deal$151.98
$199.99
Ends in --
Join Prime to buy it at $151.98
Ends in --
Join Prime to buy it at C$196.64
Updated October 2026
Data from Amazon and official Refoss and Zemismart sites.
2026 verdict
Between Refoss EM16P and Zemismart SPM02, Refoss EM16P is the better overall pick in 2026, leading on connectivity, local control, and load management.
Its clearest strengths are connectivity, local control, and load management, and it still looks stronger on its broader overall balance. Choose Zemismart SPM02 only if price matters more to you than the broader advantage from Refoss EM16P. For the average buyer, Refoss EM16P is the safer choice.
vs
40% OFF
$42.60
$70.99
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| Feature | Refoss EM16P | Zemismart SPM02 | Winner |
|---|---|---|---|
| Price | $151.98 | $42.60 | Zemismart SPM02 |
| Connectivity | 2.4 GHz WiFi, Bluetooth | Zigbee | Refoss EM16P |
| Local Control | Local API, MQTT, Local Web Interface | None | Refoss EM16P |
| Load Management | YES | NO | Refoss EM16P |
| Metering | Split-Phase Support, Three-Phase Support, Solar Net Metering, Power Factor Readings | Three-Phase Support, Solar Net Metering | Tie |
| Breaker Panel Install | YES | YES | Tie |
| Smart Meter Port | NO | NO | Tie |
| Integrations | Home Assistant | Home Assistant | Tie |
| Data & Monitoring | Energy Cost Tracking, Data Export, Usage Alerts | Usage Alerts | Tie |
| Relay Output | NO | NO | Tie |
Winner
24% OFF
Prime exclusive deal$151.98
$199.99
- + Connectivity: 2.4 GHz WiFi, Bluetooth
- + Local Control: Local API, MQTT, Local Web Interface
- + Load Management: YES
- - Price: $151.98 vs $42.60
40% OFF
$42.60
$70.99
- + Price: $42.60
- - Connectivity: Zigbee vs 2.4 GHz WiFi, Bluetooth
- - Local Control: None vs Local API, MQTT, Local Web Interface
Frequently Asked Questions
Which is better overall: Refoss EM16P or Zemismart SPM02?
Refoss EM16P has the stronger overall profile in this comparison, especially for connectivity, local control, and load management.
What is the biggest difference between Refoss EM16P and Zemismart SPM02?
Price is one of the clearest differences: Refoss EM16P lists $151.98, while Zemismart SPM02 lists $42.60.
Which one looks better on price?
Refoss EM16P is listed at $151.98, while Zemismart SPM02 is listed at $42.60. Zemismart SPM02 (better spec).
Who should buy Refoss EM16P?
Choose Refoss EM16P if your priority is connectivity and local control and that matters more than price.
Who should buy Zemismart SPM02?
Choose Zemismart SPM02 if your priority is price and that matters more than connectivity.
Full comparison table
Compare all 25 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.
- 25 Energy Monitors
- 46 specs compared
- 43 filters
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EM16P
24% OFF$199.99$151.98 
MerossEM06P
€94.99
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Unavailable
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Energy MonitorsZemismartSPM01
40% OFF$43.33$26.00- Energy MonitorsZemismart
SPM02
40% OFF$70.99$42.60 
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$170.00
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40% OFF$103.33$62.00