The Smart Device Compare comparison

Shelly 3EM-63W Gen3 vs Shelly Pro EM-50

Understand the differences. Decide what matters to your home.

Before you compare every specification

Key differences between Shelly 3EM-63W Gen3 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 3EM-63W Gen3 — No; Shelly Pro EM-50 — Yes.
Relay Output (features): Shelly 3EM-63W Gen3 — No; Shelly Pro EM-50 — Yes (Integrated switch with potential-free contacts, 2 A at 240 V).
Din Rail Mount (installation): Shelly 3EM-63W Gen3 — No (Sits above or below the DIN-rail circuit breakers instead of clipping onto the rail); Shelly Pro EM-50 — Yes (One DIN module wide).
Three Phase (metering): Shelly 3EM-63W Gen3 — Yes; Shelly Pro EM-50 — No.

Specifications to check side by side

Other (connectivity): Shelly 3EM-63W Gen3 — No; Shelly Pro EM-50 — Modbus.
Data History (data monitoring): Shelly 3EM-63W Gen3 — 7 days (At least 7 days of 1-minute data in non-volatile memory); Shelly Pro EM-50 — 60 days (At least 60 days of 1-minute data stored on the device).
Power Supply (installation): Shelly 3EM-63W Gen3 — Mains (220-240 V); Shelly Pro EM-50 — Mains (100-260 V).
Main Ct Rating (metering): Shelly 3EM-63W Gen3 — 63 A (0 to 63 A per phase, saturation at 130 A); Shelly Pro EM-50 — 50 A.

Information still to confirm

3 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 3EM-63W Gen3

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.

9differences with recorded values for every device

3rows 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 3EM-63W Gen3: Yes
Shelly Pro EM-50: Yes

5 GHz Wi-Fi

Shelly 3EM-63W Gen3: No
Shelly Pro EM-50: No

Bluetooth

Shelly 3EM-63W Gen3: Yes
Catalog note
Bluetooth 4.2
Shelly Pro EM-50: Yes
Catalog note
Bluetooth 4.2, also works as a Bluetooth gateway

Ethernet

Shelly 3EM-63W Gen3: No
Shelly Pro EM-50: Yes

Other

Shelly 3EM-63W Gen3: No
Shelly Pro EM-50: Modbus

Thread

Shelly 3EM-63W Gen3: No
Shelly Pro EM-50: No

Z Wave

Shelly 3EM-63W Gen3: No
Shelly Pro EM-50: No

Zigbee

Shelly 3EM-63W Gen3: No
Shelly Pro EM-50: No

Data Monitoring

Data Export

Shelly 3EM-63W Gen3: 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 3EM-63W Gen3

7 days

Manufacturer source

Local records cover up to seven days at one-minute intervals.

Shelly 3EM-63W Gen3 manufacturer product page →

Source section: Technical details: device description and main features
Model: Shelly 3EM-63W Gen3
Region: Manufacturer product page; no universal regional compatibility implied
Firmware: Not specified by this source
Checked: 2026-10-04

The page covers the 63W wire and 63T terminal variants. Above-breaker mounting is specific to the 63W; installation details are not interchangeable.

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

Catalog note

At least 7 days of 1-minute data in non-volatile memory

Shelly Pro EM-50

60 days

Catalog note

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

Energy Cost Tracking

Shelly 3EM-63W Gen3: Yes
Shelly Pro EM-50: Yes

Real Time Updates

Shelly 3EM-63W Gen3: Not recorded
Shelly Pro EM-50: Not recorded

Time Of Use Rates

Shelly 3EM-63W Gen3: 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 3EM-63W Gen3: Yes
Shelly Pro EM-50: Yes

Features

Automations

Shelly 3EM-63W Gen3: Yes
Shelly Pro EM-50: Yes

Load Management

Shelly 3EM-63W Gen3: Yes
Catalog note
Scripts and webhooks can drive other devices from the readings
Shelly Pro EM-50: Yes
Catalog note
Configurable load control to divert surplus PV production

Relay Output

Shelly 3EM-63W Gen3: No
Shelly Pro EM-50: Yes
Catalog note
Integrated switch with potential-free contacts, 2 A at 240 V

Installation

Breaker Panel Install

Shelly 3EM-63W Gen3: Yes
Shelly Pro EM-50: Yes

Din Rail Mount

Shelly 3EM-63W Gen3: No
Catalog note
Sits above or below the DIN-rail circuit breakers instead of clipping onto the rail
Shelly Pro EM-50: Yes
Catalog note
One DIN module wide

Power Supply

Shelly 3EM-63W Gen3: Mains (220-240 V)
Shelly Pro EM-50: Mains (100-260 V)

Smart Meter Port

Shelly 3EM-63W Gen3: No
Shelly Pro EM-50: No

Integrations

Alexa

Shelly 3EM-63W Gen3: Yes
Shelly Pro EM-50: Yes

Apple Home

Shelly 3EM-63W Gen3: No
Shelly Pro EM-50: No

Google Home

Shelly 3EM-63W Gen3: Yes
Shelly Pro EM-50: Yes

Home Assistant

Shelly 3EM-63W Gen3: Yes
Shelly Pro EM-50: Yes

Matter

Shelly 3EM-63W Gen3: No
Shelly Pro EM-50: No

SmartThings

Shelly 3EM-63W Gen3: Yes
Catalog note
Via the official Shelly Cloud integration
Shelly Pro EM-50: Yes
Catalog note
Via the official Shelly Cloud integration

Local Control

Local Api

Shelly 3EM-63W Gen3: Yes
Catalog note
RPC over HTTP and WebSocket with TLS, 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 3EM-63W Gen3

Yes

Manufacturer source

An embedded web interface provides local access.

Shelly 3EM-63W Gen3 manufacturer product page →

Source section: Technical details: device description and main features
Model: Shelly 3EM-63W Gen3
Region: Manufacturer product page; no universal regional compatibility implied
Firmware: Not specified by this source
Checked: 2026-10-04

The page covers the 63W wire and 63T terminal variants. Above-breaker mounting is specific to the 63W; installation details are not interchangeable.

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

Shelly Pro EM-50

Yes

Mqtt

Shelly 3EM-63W Gen3

Yes

Manufacturer source

MQTT communication is documented.

Shelly 3EM-63W Gen3 manufacturer product page →

Source section: Technical details: device description and main features
Model: Shelly 3EM-63W Gen3
Region: Manufacturer product page; no universal regional compatibility implied
Firmware: Not specified by this source
Checked: 2026-10-04

The page covers the 63W wire and 63T terminal variants. Above-breaker mounting is specific to the 63W; installation details are not interchangeable.

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

Shelly Pro EM-50

Yes

Metering

Accuracy

Shelly 3EM-63W Gen3: ±1%
Catalog note
Accuracy Class B for active energy, ±1% from 2 A to 63 A
Shelly Pro EM-50: ±1%
Catalog note
Accuracy Class B for active energy, ±1% from 5 A to 50 A

Bidirectional Metering

Shelly 3EM-63W Gen3: Yes
Catalog note
4 quadrant measurement, direction can be reversed per phase in software
Shelly Pro EM-50: Yes
Catalog note
4 quadrant measurement with a returned energy counter

Branch Ct Rating

Shelly 3EM-63W Gen3: Not applicable / unspecified
Shelly Pro EM-50: Not applicable / unspecified

Included Ct Sensors

Shelly 3EM-63W Gen3: Not applicable / unspecified
Catalog note
Current transformers are built into the body, conductor aperture 8 mm
Shelly Pro EM-50: 2
Catalog note
2 x 50 A current transformers

Main Ct Rating

Shelly 3EM-63W Gen3: 63 A
Catalog note
0 to 63 A per phase, saturation at 130 A
Shelly Pro EM-50: 50 A

Monitored Circuits

Shelly 3EM-63W Gen3

Manufacturer source

Three measurement channels support separate single-phase circuits.

Shelly 3EM-63W Gen3 manufacturer product page →

Source section: Technical details: device description and main features
Model: Shelly 3EM-63W Gen3
Region: Manufacturer product page; no universal regional compatibility implied
Firmware: Not specified by this source
Checked: 2026-10-04

The page covers the 63W wire and 63T terminal variants. Above-breaker mounting is specific to the 63W; installation details are not interchangeable.

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

Catalog note

Three phases, or three independent single-phase circuits

Shelly Pro EM-50

Power Factor

Shelly 3EM-63W Gen3: Yes
Catalog note
Active and apparent power and energy, power factor, fundamental reactive energy
Shelly Pro EM-50: Yes
Catalog note
Active and apparent power, power factor, frequency and voltage

Split Phase

Shelly 3EM-63W Gen3: No
Catalog note
220-240 V only, so a 120/240 V split-phase service is out of scope
Shelly Pro EM-50: No
Catalog note
Single-phase device with two current channels

Three Phase

Shelly 3EM-63W Gen3

Yes

Manufacturer source

The meter also supports a three-phase installation.

Shelly 3EM-63W Gen3 manufacturer product page →

Source section: Technical details: device description and main features
Model: Shelly 3EM-63W Gen3
Region: Manufacturer product page; no universal regional compatibility implied
Firmware: Not specified by this source
Checked: 2026-10-04

The page covers the 63W wire and 63T terminal variants. Above-breaker mounting is specific to the 63W; installation details are not interchangeable.

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

Shelly Pro EM-50

Specifications for Shelly 3EM-63W Gen3 versus Shelly Pro EM-50
Specification	Shelly 3EM-63W Gen3	Shelly Pro EM-50
Connectivity
2.4 GHz Wi-Fi	Yes	Yes
5 GHz Wi-Fi	No	No
Bluetooth	Yes Catalog note Bluetooth 4.2	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	No	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	7 days Manufacturer source Local records cover up to seven days at one-minute intervals. Shelly 3EM-63W Gen3 manufacturer product page → Source section Technical details: device description and main features Model Shelly 3EM-63W Gen3 Region Manufacturer product page; no universal regional compatibility implied Firmware Not specified by this source Checked 2026-10-04 The page covers the 63W wire and 63T terminal variants. Above-breaker mounting is specific to the 63W; installation details are not interchangeable. Document check only; not a hands-on test or verification of every regional or firmware variant. Catalog note At least 7 days of 1-minute data in non-volatile memory	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 Scripts and webhooks can drive other devices from the readings	Yes Catalog note Configurable load control to divert surplus PV production
Relay Output	No	Yes Catalog note Integrated switch with potential-free contacts, 2 A at 240 V
Installation
Breaker Panel Install	Yes	Yes
Din Rail Mount	No Catalog note Sits above or below the DIN-rail circuit breakers instead of clipping onto the rail	Yes Catalog note One DIN module wide
Power Supply	Mains (220-240 V)	Mains (100-260 V)
Smart Meter Port	No	No
Integrations
Alexa	Yes	Yes
Apple Home	No	No
Google Home	Yes	Yes
Home Assistant	Yes	Yes
Matter	No	No
SmartThings	Yes Catalog note Via the official Shelly Cloud integration	Yes Catalog note Via the official Shelly Cloud integration
Local Control
Local Api	Yes Catalog note RPC over HTTP and WebSocket with TLS, plus webhooks and scripting	Yes Catalog note RPC over HTTPS and WebSocket, UDP, webhooks, scripting and Modbus TCP
Local Web Interface	Yes Manufacturer source An embedded web interface provides local access. Shelly 3EM-63W Gen3 manufacturer product page → Source section Technical details: device description and main features Model Shelly 3EM-63W Gen3 Region Manufacturer product page; no universal regional compatibility implied Firmware Not specified by this source Checked 2026-10-04 The page covers the 63W wire and 63T terminal variants. Above-breaker mounting is specific to the 63W; installation details are not interchangeable. Document check only; not a hands-on test or verification of every regional or firmware variant.	Yes
Mqtt	Yes Manufacturer source MQTT communication is documented. Shelly 3EM-63W Gen3 manufacturer product page → Source section Technical details: device description and main features Model Shelly 3EM-63W Gen3 Region Manufacturer product page; no universal regional compatibility implied Firmware Not specified by this source Checked 2026-10-04 The page covers the 63W wire and 63T terminal variants. Above-breaker mounting is specific to the 63W; installation details are not interchangeable. Document check only; not a hands-on test or verification of every regional or firmware variant.	Yes
Metering
Accuracy	±1% Catalog note Accuracy Class B for active energy, ±1% from 2 A to 63 A	±1% Catalog note Accuracy Class B for active energy, ±1% from 5 A to 50 A
Bidirectional Metering	Yes Catalog note 4 quadrant measurement, direction can be reversed per phase in software	Yes Catalog note 4 quadrant measurement with a returned energy counter
Branch Ct Rating	Not applicable / unspecified	Not applicable / unspecified
Included Ct Sensors	Not applicable / unspecified Catalog note Current transformers are built into the body, conductor aperture 8 mm	2 Catalog note 2 x 50 A current transformers
Main Ct Rating	63 A Catalog note 0 to 63 A per phase, saturation at 130 A	50 A
Monitored Circuits	3 Manufacturer source Three measurement channels support separate single-phase circuits. Shelly 3EM-63W Gen3 manufacturer product page → Source section Technical details: device description and main features Model Shelly 3EM-63W Gen3 Region Manufacturer product page; no universal regional compatibility implied Firmware Not specified by this source Checked 2026-10-04 The page covers the 63W wire and 63T terminal variants. Above-breaker mounting is specific to the 63W; installation details are not interchangeable. Document check only; not a hands-on test or verification of every regional or firmware variant. Catalog note Three phases, or three independent single-phase circuits	2
Power Factor	Yes Catalog note Active and apparent power and energy, power factor, fundamental reactive energy	Yes Catalog note Active and apparent power, power factor, frequency and voltage
Split Phase	No Catalog note 220-240 V only, so a 120/240 V split-phase service is out of scope	No Catalog note Single-phase device with two current channels
Three Phase	Yes Manufacturer source The meter also supports a three-phase installation. Shelly 3EM-63W Gen3 manufacturer product page → Source section Technical details: device description and main features Model Shelly 3EM-63W Gen3 Region Manufacturer product page; no universal regional compatibility implied Firmware Not specified by this source Checked 2026-10-04 The page covers the 63W wire and 63T terminal variants. Above-breaker mounting is specific to the 63W; installation details are not interchangeable. Document check only; not a hands-on test or verification of every regional or firmware variant.	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