The Smart Device Compare comparison

Shelly Pro EM-50 vs Zemismart SDM01

Understand the differences. Decide what matters to your home.

Before you compare every specification

Key differences between Shelly Pro EM-50 and Zemismart SDM01

A summary of selected recorded differences between these energy monitors. Check the full specification table below for details and conditions.

Feature differences among your selected devices

2.4 GHz Wi-Fi (connectivity): Shelly Pro EM-50 — Yes; Zemismart SDM01 — No.
Bluetooth (connectivity): Shelly Pro EM-50 — Yes (Bluetooth 4.2, also works as a Bluetooth gateway); Zemismart SDM01 — No.
Ethernet (connectivity): Shelly Pro EM-50 — Yes; Zemismart SDM01 — No.
Load Management (features): Shelly Pro EM-50 — Yes (Configurable load control to divert surplus PV production); Zemismart SDM01 — No.

Specifications to check side by side

Other (connectivity): Shelly Pro EM-50 — Modbus; Zemismart SDM01 — No.
Zigbee (connectivity): Shelly Pro EM-50 — No; Zemismart SDM01 — Zigbee Hub required (Zigbee 3.0 on a Tuya ZS3L module, acts as a Zigbee router).
Power Supply (installation): Shelly Pro EM-50 — Mains (100-260 V); Zemismart SDM01 — Mains (120-240 V).
Included Ct Sensors (metering): Shelly Pro EM-50 — 2 (2 x 50 A current transformers); Zemismart SDM01 — 3 (3 x 120 A split-core current transformers).

Information still to confirm

8 of 39 comparison fields lack a resolved value for at least one selected device. Missing information is not evidence that a feature is absent.
Check the full table and manufacturer documentation before ruling out a device.

These observations are derived from recorded catalog data and have not all been independently verified. Confirm details with the manufacturer before purchasing.

Compare capabilities, compatibility and setup requirements.

Option 1 · Shelly

Shelly Pro EM-50

Last updated October 2026

View full device profile

Option 2 · Zemismart

Zemismart SDM01

Catalog update date not recorded

View full device profile

What the catalog tells us

Understand the tradeoffs.

These counts describe the available data, not a quality score. More features do not automatically make a better device.

17differences with recorded values for every device

8rows with missing or unspecified information

Your priorities, side by side

Focus on what changes.

Mark the specifications you care about. Open manufacturer sources for verification scope; fields without citations remain catalog data. Expand notes for other qualifications.

Differences onlyMy priorities (0)

Showing 39 of 39 rows. “Not recorded” does not mean “No”.

Reading layout

Connectivity

2.4 GHz Wi-Fi

Shelly Pro EM-50: Yes
Zemismart SDM01: No

5 GHz Wi-Fi

Shelly Pro EM-50: No
Zemismart SDM01: No

Bluetooth

Shelly Pro EM-50: Yes
Catalog note
Bluetooth 4.2, also works as a Bluetooth gateway
Zemismart SDM01: No

Ethernet

Shelly Pro EM-50: Yes
Zemismart SDM01: No

Other

Shelly Pro EM-50: Modbus
Zemismart SDM01: No

Thread

Shelly Pro EM-50: No
Zemismart SDM01: No

Z Wave

Shelly Pro EM-50: No
Zemismart SDM01: No

Zigbee

Shelly Pro EM-50: No
Zemismart SDM01: Zigbee Hub required
Catalog note
Zigbee 3.0 on a Tuya ZS3L module, acts as a Zigbee router

Data Monitoring

Data Export

Shelly Pro EM-50: Yes
Catalog note
CSV export of the consumption chart
Zemismart SDM01: Not recorded

Data History

Shelly Pro EM-50: 60 days
Catalog note
At least 60 days of 1-minute data stored on the device
Zemismart SDM01: Not applicable / unspecified

Energy Cost Tracking

Shelly Pro EM-50: Yes
Zemismart SDM01: Not recorded

Real Time Updates

Shelly Pro EM-50: Not recorded
Zemismart SDM01: 5 s

Time Of Use Rates

Shelly Pro EM-50: Yes
Catalog note
Cost periods and tariff distribution in the Shelly Smart Control app
Zemismart SDM01: Not recorded

Usage Alerts

Shelly Pro EM-50: Yes
Zemismart SDM01: Yes
Catalog note
Alarm messages for abnormal or unbalanced load

Features

Automations

Shelly Pro EM-50: Yes
Zemismart SDM01: Yes
Catalog note
Through the Zigbee hub or Home Assistant, not the device itself

Load Management

Shelly Pro EM-50: Yes
Catalog note
Configurable load control to divert surplus PV production
Zemismart SDM01: No

Relay Output

Shelly Pro EM-50: Yes
Catalog note
Integrated switch with potential-free contacts, 2 A at 240 V
Zemismart SDM01: No

Installation

Breaker Panel Install

Shelly Pro EM-50: Yes
Zemismart SDM01: Yes

Din Rail Mount

Shelly Pro EM-50

Yes

Catalog note

One DIN module wide

Zemismart SDM01

Yes

Manufacturer source

DIN rail installation is supported.

Zemismart SDM01 manufacturer product page →

Source section: Product description
Model: Zemismart SDM01
Region: Manufacturer product page; no universal regional compatibility implied
Firmware: Not specified by this source
Checked: 2026-10-04

Applies to the SDM01-TZ0-12-ZM variant named in the source.

Document check only; not a hands-on test or verification of every regional or firmware variant.

Catalog note

One 18 mm DIN module

Power Supply

Shelly Pro EM-50: Mains (100-260 V)
Zemismart SDM01: Mains (120-240 V)

Smart Meter Port

Shelly Pro EM-50: No
Zemismart SDM01: No

Integrations

Alexa

Shelly Pro EM-50: Yes
Zemismart SDM01: No
Catalog note
Alexa has no energy meter device type and this meter has no relay to expose as a switch, so a skill has nothing to publish

Apple Home

Shelly Pro EM-50: No
Zemismart SDM01: No

Google Home

Shelly Pro EM-50: Yes
Zemismart SDM01: Not recorded

Home Assistant

Shelly Pro EM-50: Yes
Zemismart SDM01: Yes
Catalog note
Via Zigbee2MQTT, exposed as TS0601 _TZE204_ugekduaj

Matter

Shelly Pro EM-50: No
Zemismart SDM01: No

SmartThings

Shelly Pro EM-50: Yes
Catalog note
Via the official Shelly Cloud integration
Zemismart SDM01: No

Local Control

Local Api

Shelly Pro EM-50: Yes
Catalog note
RPC over HTTPS and WebSocket, UDP, webhooks, scripting and Modbus TCP
Zemismart SDM01: No

Local Web Interface

Shelly Pro EM-50: Yes
Zemismart SDM01: No

Mqtt

Shelly Pro EM-50: Yes
Zemismart SDM01: No
Catalog note
No native MQTT, though Zigbee2MQTT republishes the readings

Metering

Accuracy

Shelly Pro EM-50: ±1%
Catalog note
Accuracy Class B for active energy, ±1% from 5 A to 50 A
Zemismart SDM01: ±1%

Bidirectional Metering

Shelly Pro EM-50

Yes

Catalog note

4 quadrant measurement with a returned energy counter

Zemismart SDM01

Yes

Manufacturer source

Bidirectional energy measurement is supported.

Zemismart SDM01 manufacturer product page →

Source section: Product description
Model: Zemismart SDM01
Region: Manufacturer product page; no universal regional compatibility implied
Firmware: Not specified by this source
Checked: 2026-10-04

Applies to the SDM01-TZ0-12-ZM variant named in the source.

Document check only; not a hands-on test or verification of every regional or firmware variant.

Catalog note

Consumed and produced energy reported per phase

Branch Ct Rating

Shelly Pro EM-50: Not applicable / unspecified
Zemismart SDM01: Not applicable / unspecified

Included Ct Sensors

Shelly Pro EM-50: 2
Catalog note
2 x 50 A current transformers
Zemismart SDM01: 3
Catalog note
3 x 120 A split-core current transformers

Main Ct Rating

Shelly Pro EM-50

50 A

Zemismart SDM01

120 A

Manufacturer source

The stated maximum measurement current is 120 A.

Zemismart SDM01 manufacturer product page →

Source section: Product description
Model: Zemismart SDM01
Region: Manufacturer product page; no universal regional compatibility implied
Firmware: Not specified by this source
Checked: 2026-10-04

Applies to the SDM01-TZ0-12-ZM variant named in the source.

Document check only; not a hands-on test or verification of every regional or firmware variant.

Monitored Circuits

Shelly Pro EM-50

Zemismart SDM01

Manufacturer source

Three current-transformer channels are specified.

Zemismart SDM01 manufacturer product page →

Source section: Product description
Model: Zemismart SDM01
Region: Manufacturer product page; no universal regional compatibility implied
Firmware: Not specified by this source
Checked: 2026-10-04

Applies to the SDM01-TZ0-12-ZM variant named in the source.

Document check only; not a hands-on test or verification of every regional or firmware variant.

Catalog note

Three phases, or three single-phase circuits

Power Factor

Shelly Pro EM-50: Yes
Catalog note
Active and apparent power, power factor, frequency and voltage
Zemismart SDM01: Yes
Catalog note
Voltage, current, power, power factor and frequency per phase

Split Phase

Shelly Pro EM-50: No
Catalog note
Single-phase device with two current channels
Zemismart SDM01: Not recorded

Three Phase

Shelly Pro EM-50

Zemismart SDM01

Yes

Manufacturer source

Three-phase measurement is supported.

Zemismart SDM01 manufacturer product page →

Source section: Product description
Model: Zemismart SDM01
Region: Manufacturer product page; no universal regional compatibility implied
Firmware: Not specified by this source
Checked: 2026-10-04

Applies to the SDM01-TZ0-12-ZM variant named in the source.

Document check only; not a hands-on test or verification of every regional or firmware variant.

Specifications for Shelly Pro EM-50 versus Zemismart SDM01
Specification	Shelly Pro EM-50	Zemismart SDM01
Connectivity
2.4 GHz Wi-Fi	Yes	No
5 GHz Wi-Fi	No	No
Bluetooth	Yes Catalog note Bluetooth 4.2, also works as a Bluetooth gateway	No
Ethernet	Yes	No
Other	Modbus	No
Thread	No	No
Z Wave	No	No
Zigbee	No	Zigbee Hub required Catalog note Zigbee 3.0 on a Tuya ZS3L module, acts as a Zigbee router
Data Monitoring
Data Export	Yes Catalog note CSV export of the consumption chart	Not recorded
Data History	60 days Catalog note At least 60 days of 1-minute data stored on the device	Not applicable / unspecified
Energy Cost Tracking	Yes	Not recorded
Real Time Updates	Not recorded	5 s
Time Of Use Rates	Yes Catalog note Cost periods and tariff distribution in the Shelly Smart Control app	Not recorded
Usage Alerts	Yes	Yes Catalog note Alarm messages for abnormal or unbalanced load
Features
Automations	Yes	Yes Catalog note Through the Zigbee hub or Home Assistant, not the device itself
Load Management	Yes Catalog note Configurable load control to divert surplus PV production	No
Relay Output	Yes Catalog note Integrated switch with potential-free contacts, 2 A at 240 V	No
Installation
Breaker Panel Install	Yes	Yes
Din Rail Mount	Yes Catalog note One DIN module wide	Yes Manufacturer source DIN rail installation is supported. Zemismart SDM01 manufacturer product page → Source section Product description Model Zemismart SDM01 Region Manufacturer product page; no universal regional compatibility implied Firmware Not specified by this source Checked 2026-10-04 Applies to the SDM01-TZ0-12-ZM variant named in the source. Document check only; not a hands-on test or verification of every regional or firmware variant. Catalog note One 18 mm DIN module
Power Supply	Mains (100-260 V)	Mains (120-240 V)
Smart Meter Port	No	No
Integrations
Alexa	Yes	No Catalog note Alexa has no energy meter device type and this meter has no relay to expose as a switch, so a skill has nothing to publish
Apple Home	No	No
Google Home	Yes	Not recorded
Home Assistant	Yes	Yes Catalog note Via Zigbee2MQTT, exposed as TS0601 _TZE204_ugekduaj
Matter	No	No
SmartThings	Yes Catalog note Via the official Shelly Cloud integration	No
Local Control
Local Api	Yes Catalog note RPC over HTTPS and WebSocket, UDP, webhooks, scripting and Modbus TCP	No
Local Web Interface	Yes	No
Mqtt	Yes	No Catalog note No native MQTT, though Zigbee2MQTT republishes the readings
Metering
Accuracy	±1% Catalog note Accuracy Class B for active energy, ±1% from 5 A to 50 A	±1%
Bidirectional Metering	Yes Catalog note 4 quadrant measurement with a returned energy counter	Yes Manufacturer source Bidirectional energy measurement is supported. Zemismart SDM01 manufacturer product page → Source section Product description Model Zemismart SDM01 Region Manufacturer product page; no universal regional compatibility implied Firmware Not specified by this source Checked 2026-10-04 Applies to the SDM01-TZ0-12-ZM variant named in the source. Document check only; not a hands-on test or verification of every regional or firmware variant. Catalog note Consumed and produced energy reported per phase
Branch Ct Rating	Not applicable / unspecified	Not applicable / unspecified
Included Ct Sensors	2 Catalog note 2 x 50 A current transformers	3 Catalog note 3 x 120 A split-core current transformers
Main Ct Rating	50 A	120 A Manufacturer source The stated maximum measurement current is 120 A. Zemismart SDM01 manufacturer product page → Source section Product description Model Zemismart SDM01 Region Manufacturer product page; no universal regional compatibility implied Firmware Not specified by this source Checked 2026-10-04 Applies to the SDM01-TZ0-12-ZM variant named in the source. Document check only; not a hands-on test or verification of every regional or firmware variant.
Monitored Circuits	2	3 Manufacturer source Three current-transformer channels are specified. Zemismart SDM01 manufacturer product page → Source section Product description Model Zemismart SDM01 Region Manufacturer product page; no universal regional compatibility implied Firmware Not specified by this source Checked 2026-10-04 Applies to the SDM01-TZ0-12-ZM variant named in the source. Document check only; not a hands-on test or verification of every regional or firmware variant. Catalog note Three phases, or three single-phase circuits
Power Factor	Yes Catalog note Active and apparent power, power factor, frequency and voltage	Yes Catalog note Voltage, current, power, power factor and frequency per phase
Split Phase	No Catalog note Single-phase device with two current channels	Not recorded
Three Phase	No	Yes Manufacturer source Three-phase measurement is supported. Zemismart SDM01 manufacturer product page → Source section Product description Model Zemismart SDM01 Region Manufacturer product page; no universal regional compatibility implied Firmware Not specified by this source Checked 2026-10-04 Applies to the SDM01-TZ0-12-ZM variant named in the source. Document check only; not a hands-on test or verification of every regional or firmware variant.

Know what’s behind the comparison.

The table matches specifications by section and field. It preserves notes, separates missing data from explicit “No” values, and keeps qualifications attached to their values. No overall winner is assigned from feature counts.

Read our comparison methodology