Refoss EM16P vs Zemismart SDM01 comparison

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.

Winner

Refoss

Refoss EM16P

25% OFF

$179.99

$239.99

Buy on Amazon USA

Zemismart

Zemismart SDM01

50% OFF

$82.61

$165.22

Buy on Official Store

Feature	Refoss EM16P	Zemismart SDM01	Winner
Price	$179.99	$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

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
+ Connectivity: 2.4 GHz WiFi, Bluetooth
+ Data & Monitoring: Energy Cost Tracking, Data Export, Usage Alerts
- Price: $179.99 vs $82.61

Zemismart

Zemismart SDM01

50% OFF

$82.61

$165.22

Buy on Official Store

+ 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 $179.99, while Zemismart SDM01 lists $82.61.

Which one looks better on price?

Refoss EM16P is listed at $179.99, 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.

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