The Smart Device Compare comparison

Shelly EM Gen4 vs Shelly Pro EM-50

Understand the differences. Decide what matters to your home.

Before you compare every specification

Key differences between Shelly EM Gen4 and Shelly Pro EM-50

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

Ethernet (connectivity): Shelly EM Gen4 — No; Shelly Pro EM-50 — Yes.
Din Rail Mount (installation): Shelly EM Gen4 — No; Shelly Pro EM-50 — Yes (One DIN module wide).
Apple Home (integrations): Shelly EM Gen4 — Yes (Via Matter); Shelly Pro EM-50 — No.
Matter (integrations): Shelly EM Gen4 — Yes (Matter-certified out of the box); Shelly Pro EM-50 — No.

Specifications to check side by side

Other (connectivity): Shelly EM Gen4 — No; Shelly Pro EM-50 — Modbus.
Zigbee (connectivity): Shelly EM Gen4 — Zigbee Hub required (Zigbee 802.15.4 and acts as a Zigbee repeater); Shelly Pro EM-50 — No.
Data History (data monitoring): Shelly EM Gen4 — 30 days (At least 30 days of 1-minute records stored on the device); Shelly Pro EM-50 — 60 days (At least 60 days of 1-minute data stored on the device).
Power Supply (installation): Shelly EM Gen4 — Mains (110-240 V); Shelly Pro EM-50 — Mains (100-260 V).

Information still to confirm

2 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 EM Gen4

Catalog update date not recorded

View full device profile

Option 2 · Shelly

Shelly Pro EM-50

Last updated October 2026

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.

10differences with recorded values for every device

2rows with missing or unspecified information

Consider your setup

Apple Home

Shelly EM Gen4Yes
Shelly Pro EM-50No

Confirm which features appear in Apple Home and whether extra hardware or a subscription is needed for your intended use.

Inspect the specifications

Consider your setup

Matter

Shelly EM Gen4Yes
Shelly Pro EM-50No

Confirm the exact device type and the features exposed in your chosen platform. Protocol support does not establish feature parity across apps.

Inspect the specifications

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 EM Gen4: Yes
Catalog note
Wi-Fi 6 (802.11 b/g/n/ax) on 2.4 GHz
Shelly Pro EM-50: Yes

5 GHz Wi-Fi

Shelly EM Gen4: No
Shelly Pro EM-50: No

Bluetooth

Shelly EM Gen4

Yes

Manufacturer source

Bluetooth connectivity is documented.

Shelly EM Gen4 manufacturer product page →

Source section: Technical details: device description and main features
Model: Shelly EM Gen4
Region: Manufacturer product page; no universal regional compatibility implied
Firmware: Not specified by this source
Checked: 2026-10-04

The relay controls a contactor; its existence does not establish a suitable rating for directly switching a high-power load.

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

Catalog note

Bluetooth 5 LE

Shelly Pro EM-50

Yes

Catalog note

Bluetooth 4.2, also works as a Bluetooth gateway

Ethernet

Shelly EM Gen4: No
Shelly Pro EM-50: Yes

Other

Shelly EM Gen4: No
Shelly Pro EM-50: Modbus

Thread

Shelly EM Gen4: No
Shelly Pro EM-50: No

Z Wave

Shelly EM Gen4: No
Shelly Pro EM-50: No

Zigbee

Shelly EM Gen4: Zigbee Hub required
Catalog note
Zigbee 802.15.4 and acts as a Zigbee repeater
Shelly Pro EM-50: No

Data Monitoring

Data Export

Shelly EM Gen4: Yes
Catalog note
CSV for power quality values and JSON through RPC
Shelly Pro EM-50: Yes
Catalog note
CSV export of the consumption chart

Data History

Shelly EM Gen4

30 days

Manufacturer source

Local storage retains at least 30 days of one-minute records.

Shelly EM Gen4 manufacturer product page →

Source section: Technical details: device description and main features
Model: Shelly EM Gen4
Region: Manufacturer product page; no universal regional compatibility implied
Firmware: Not specified by this source
Checked: 2026-10-04

The relay controls a contactor; its existence does not establish a suitable rating for directly switching a high-power load.

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

Catalog note

At least 30 days of 1-minute records stored on the device

Shelly Pro EM-50

60 days

Catalog note

At least 60 days of 1-minute data stored on the device

Energy Cost Tracking

Shelly EM Gen4: Yes
Shelly Pro EM-50: Yes

Real Time Updates

Shelly EM Gen4: Not recorded
Shelly Pro EM-50: Not recorded

Time Of Use Rates

Shelly EM Gen4: Yes
Catalog note
Cost periods and tariff distribution in the Shelly Smart Control app
Shelly Pro EM-50: Yes
Catalog note
Cost periods and tariff distribution in the Shelly Smart Control app

Usage Alerts

Shelly EM Gen4: Yes
Shelly Pro EM-50: Yes

Features

Automations

Shelly EM Gen4: Yes
Shelly Pro EM-50: Yes

Load Management

Shelly EM Gen4: Yes
Catalog note
Switch a contactor from consumption thresholds or schedules
Shelly Pro EM-50: Yes
Catalog note
Configurable load control to divert surplus PV production

Relay Output

Shelly EM Gen4

Yes

Manufacturer source

A dry-contact relay can control an external contactor.

Shelly EM Gen4 manufacturer product page →

Source section: Technical details: device description and main features
Model: Shelly EM Gen4
Region: Manufacturer product page; no universal regional compatibility implied
Firmware: Not specified by this source
Checked: 2026-10-04

The relay controls a contactor; its existence does not establish a suitable rating for directly switching a high-power load.

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

Catalog note

Dry contact rated 2 A at 240 V for contactor control

Shelly Pro EM-50

Yes

Catalog note

Integrated switch with potential-free contacts, 2 A at 240 V

Installation

Breaker Panel Install

Shelly EM Gen4: Yes
Catalog note
Also fits inside a wall box or an appliance control box
Shelly Pro EM-50: Yes

Din Rail Mount

Shelly EM Gen4: No
Shelly Pro EM-50: Yes
Catalog note
One DIN module wide

Power Supply

Shelly EM Gen4: Mains (110-240 V)
Shelly Pro EM-50: Mains (100-260 V)

Smart Meter Port

Shelly EM Gen4: No
Shelly Pro EM-50: No

Integrations

Alexa

Shelly EM Gen4: Yes
Shelly Pro EM-50: Yes

Apple Home

Shelly EM Gen4: Yes
Catalog note
Via Matter
Shelly Pro EM-50: No

Google Home

Shelly EM Gen4: Yes
Shelly Pro EM-50: Yes

Home Assistant

Shelly EM Gen4: Yes
Shelly Pro EM-50: Yes

Matter

Shelly EM Gen4

Yes

Manufacturer source

The manufacturer specifies Matter compatibility.

Shelly EM Gen4 manufacturer product page →

Source section: Technical details: device description and main features
Model: Shelly EM Gen4
Region: Manufacturer product page; no universal regional compatibility implied
Firmware: Not specified by this source
Checked: 2026-10-04

The relay controls a contactor; its existence does not establish a suitable rating for directly switching a high-power load.

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

Catalog note

Matter-certified out of the box

Shelly Pro EM-50

SmartThings

Shelly EM Gen4: Yes
Shelly Pro EM-50: Yes
Catalog note
Via the official Shelly Cloud integration

Local Control

Local Api

Shelly EM Gen4: Yes
Catalog note
RPC over HTTP and WebSocket, plus webhooks and scripting
Shelly Pro EM-50: Yes
Catalog note
RPC over HTTPS and WebSocket, UDP, webhooks, scripting and Modbus TCP

Local Web Interface

Shelly EM Gen4

Yes

Manufacturer source

The meter has an embedded web interface.

Shelly EM Gen4 manufacturer product page →

Source section: Technical details: device description and main features
Model: Shelly EM Gen4
Region: Manufacturer product page; no universal regional compatibility implied
Firmware: Not specified by this source
Checked: 2026-10-04

The relay controls a contactor; its existence does not establish a suitable rating for directly switching a high-power load.

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

Shelly Pro EM-50

Yes

Mqtt

Shelly EM Gen4: Yes
Shelly Pro EM-50: Yes

Metering

Accuracy

Shelly EM Gen4: ±2%
Shelly Pro EM-50: ±1%
Catalog note
Accuracy Class B for active energy, ±1% from 5 A to 50 A

Bidirectional Metering

Shelly EM Gen4: Yes
Shelly Pro EM-50: Yes
Catalog note
4 quadrant measurement with a returned energy counter

Branch Ct Rating

Shelly EM Gen4: Not applicable / unspecified
Shelly Pro EM-50: Not applicable / unspecified

Included Ct Sensors

Shelly EM Gen4: 1
Catalog note
One 50 A clamp in the box, a second CT is sold separately
Shelly Pro EM-50: 2
Catalog note
2 x 50 A current transformers

Main Ct Rating

Shelly EM Gen4: 50 A
Catalog note
80 A and 120 A current transformers also supported
Shelly Pro EM-50: 50 A

Monitored Circuits

Shelly EM Gen4

Manufacturer source

Two current-transformer channels measure a single-phase supply.

Shelly EM Gen4 manufacturer product page →

Source section: Technical details: device description and main features
Model: Shelly EM Gen4
Region: Manufacturer product page; no universal regional compatibility implied
Firmware: Not specified by this source
Checked: 2026-10-04

The relay controls a contactor; its existence does not establish a suitable rating for directly switching a high-power load.

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

Shelly Pro EM-50

Power Factor

Shelly EM Gen4: Yes
Catalog note
Active and apparent power and energy, plus power factor
Shelly Pro EM-50: Yes
Catalog note
Active and apparent power, power factor, frequency and voltage

Split Phase

Shelly EM Gen4: No
Catalog note
Single-phase device with two current channels
Shelly Pro EM-50: No
Catalog note
Single-phase device with two current channels

Three Phase

Shelly EM Gen4: No
Shelly Pro EM-50: No

Specifications for Shelly EM Gen4 versus Shelly Pro EM-50
Specification	Shelly EM Gen4	Shelly Pro EM-50
Connectivity
2.4 GHz Wi-Fi	Yes Catalog note Wi-Fi 6 (802.11 b/g/n/ax) on 2.4 GHz	Yes
5 GHz Wi-Fi	No	No
Bluetooth	Yes Manufacturer source Bluetooth connectivity is documented. Shelly EM Gen4 manufacturer product page → Source section Technical details: device description and main features Model Shelly EM Gen4 Region Manufacturer product page; no universal regional compatibility implied Firmware Not specified by this source Checked 2026-10-04 The relay controls a contactor; its existence does not establish a suitable rating for directly switching a high-power load. Document check only; not a hands-on test or verification of every regional or firmware variant. Catalog note Bluetooth 5 LE	Yes Catalog note Bluetooth 4.2, also works as a Bluetooth gateway
Ethernet	No	Yes
Other	No	Modbus
Thread	No	No
Z Wave	No	No
Zigbee	Zigbee Hub required Catalog note Zigbee 802.15.4 and acts as a Zigbee repeater	No
Data Monitoring
Data Export	Yes Catalog note CSV for power quality values and JSON through RPC	Yes Catalog note CSV export of the consumption chart
Data History	30 days Manufacturer source Local storage retains at least 30 days of one-minute records. Shelly EM Gen4 manufacturer product page → Source section Technical details: device description and main features Model Shelly EM Gen4 Region Manufacturer product page; no universal regional compatibility implied Firmware Not specified by this source Checked 2026-10-04 The relay controls a contactor; its existence does not establish a suitable rating for directly switching a high-power load. Document check only; not a hands-on test or verification of every regional or firmware variant. Catalog note At least 30 days of 1-minute records stored on the device	60 days Catalog note At least 60 days of 1-minute data stored on the device
Energy Cost Tracking	Yes	Yes
Real Time Updates	Not recorded	Not recorded
Time Of Use Rates	Yes Catalog note Cost periods and tariff distribution in the Shelly Smart Control app	Yes Catalog note Cost periods and tariff distribution in the Shelly Smart Control app
Usage Alerts	Yes	Yes
Features
Automations	Yes	Yes
Load Management	Yes Catalog note Switch a contactor from consumption thresholds or schedules	Yes Catalog note Configurable load control to divert surplus PV production
Relay Output	Yes Manufacturer source A dry-contact relay can control an external contactor. Shelly EM Gen4 manufacturer product page → Source section Technical details: device description and main features Model Shelly EM Gen4 Region Manufacturer product page; no universal regional compatibility implied Firmware Not specified by this source Checked 2026-10-04 The relay controls a contactor; its existence does not establish a suitable rating for directly switching a high-power load. Document check only; not a hands-on test or verification of every regional or firmware variant. Catalog note Dry contact rated 2 A at 240 V for contactor control	Yes Catalog note Integrated switch with potential-free contacts, 2 A at 240 V
Installation
Breaker Panel Install	Yes Catalog note Also fits inside a wall box or an appliance control box	Yes
Din Rail Mount	No	Yes Catalog note One DIN module wide
Power Supply	Mains (110-240 V)	Mains (100-260 V)
Smart Meter Port	No	No
Integrations
Alexa	Yes	Yes
Apple Home	Yes Catalog note Via Matter	No
Google Home	Yes	Yes
Home Assistant	Yes	Yes
Matter	Yes Manufacturer source The manufacturer specifies Matter compatibility. Shelly EM Gen4 manufacturer product page → Source section Technical details: device description and main features Model Shelly EM Gen4 Region Manufacturer product page; no universal regional compatibility implied Firmware Not specified by this source Checked 2026-10-04 The relay controls a contactor; its existence does not establish a suitable rating for directly switching a high-power load. Document check only; not a hands-on test or verification of every regional or firmware variant. Catalog note Matter-certified out of the box	No
SmartThings	Yes	Yes Catalog note Via the official Shelly Cloud integration
Local Control
Local Api	Yes Catalog note RPC over HTTP and WebSocket, plus webhooks and scripting	Yes Catalog note RPC over HTTPS and WebSocket, UDP, webhooks, scripting and Modbus TCP
Local Web Interface	Yes Manufacturer source The meter has an embedded web interface. Shelly EM Gen4 manufacturer product page → Source section Technical details: device description and main features Model Shelly EM Gen4 Region Manufacturer product page; no universal regional compatibility implied Firmware Not specified by this source Checked 2026-10-04 The relay controls a contactor; its existence does not establish a suitable rating for directly switching a high-power load. Document check only; not a hands-on test or verification of every regional or firmware variant.	Yes
Mqtt	Yes	Yes
Metering
Accuracy	±2%	±1% Catalog note Accuracy Class B for active energy, ±1% from 5 A to 50 A
Bidirectional Metering	Yes	Yes Catalog note 4 quadrant measurement with a returned energy counter
Branch Ct Rating	Not applicable / unspecified	Not applicable / unspecified
Included Ct Sensors	1 Catalog note One 50 A clamp in the box, a second CT is sold separately	2 Catalog note 2 x 50 A current transformers
Main Ct Rating	50 A Catalog note 80 A and 120 A current transformers also supported	50 A
Monitored Circuits	2 Manufacturer source Two current-transformer channels measure a single-phase supply. Shelly EM Gen4 manufacturer product page → Source section Technical details: device description and main features Model Shelly EM Gen4 Region Manufacturer product page; no universal regional compatibility implied Firmware Not specified by this source Checked 2026-10-04 The relay controls a contactor; its existence does not establish a suitable rating for directly switching a high-power load. Document check only; not a hands-on test or verification of every regional or firmware variant.	2
Power Factor	Yes Catalog note Active and apparent power and energy, plus power factor	Yes Catalog note Active and apparent power, power factor, frequency and voltage
Split Phase	No Catalog note Single-phase device with two current channels	No Catalog note Single-phase device with two current channels
Three Phase	No	No

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