The Smart Device Compare comparison

Shelly Pro EM-50 vs SONOFF POWCT

Understand the differences. Decide what matters to your home.

Before you compare every specification

Key differences between Shelly Pro EM-50 and SONOFF POWCT

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

Bluetooth (connectivity): Shelly Pro EM-50 — Yes (Bluetooth 4.2, also works as a Bluetooth gateway); SONOFF POWCT — No.
Ethernet (connectivity): Shelly Pro EM-50 — Yes; SONOFF POWCT — No.
Local Api (local control): Shelly Pro EM-50 — Yes (RPC over HTTPS and WebSocket, UDP, webhooks, scripting and Modbus TCP); SONOFF POWCT — No (eWeLink LAN mode keeps control working without internet, but there is no documented device API).
Local Web Interface (local control): Shelly Pro EM-50 — Yes; SONOFF POWCT — No.

Specifications to check side by side

Other (connectivity): Shelly Pro EM-50 — Modbus; SONOFF POWCT — No.
Data History (data monitoring): Shelly Pro EM-50 — 60 days (At least 60 days of 1-minute data stored on the device); SONOFF POWCT — 6 months (Hour-by-hour records kept on the device, survives power cuts).
Power Supply (installation): Shelly Pro EM-50 — Mains (100-260 V); SONOFF POWCT — Mains (100-240 V).
Apple Home (integrations): Shelly Pro EM-50 — No; SONOFF POWCT — SONOFF Hub required (SONOFF lists this model among the eWeLink Wi-Fi devices its Matter bridges (Zigbee Bridge Ultra, iHost, NSPanel Pro) publish to Matter, which is how it reaches the Apple Home app.).

Information still to confirm

5 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 · Sonoff

SONOFF POWCT

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.

14differences with recorded values for every device

5rows with missing or unspecified information

Consider your setup

Apple Home

Shelly Pro EM-50No
SONOFF POWCTSONOFF Hub required

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 Pro EM-50No
SONOFF POWCTSONOFF Hub required

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 Pro EM-50: Yes
SONOFF POWCT: Yes
Catalog note
External antenna on a lead so it can sit outside the panel

5 GHz Wi-Fi

Shelly Pro EM-50: No
SONOFF POWCT: No

Bluetooth

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

Ethernet

Shelly Pro EM-50: Yes
SONOFF POWCT: No

Other

Shelly Pro EM-50: Modbus
SONOFF POWCT: No

Thread

Shelly Pro EM-50: No
SONOFF POWCT: No

Z Wave

Shelly Pro EM-50: No
SONOFF POWCT: No

Zigbee

Shelly Pro EM-50: No
SONOFF POWCT: No

Data Monitoring

Data Export

Shelly Pro EM-50

Yes

Catalog note

CSV export of the consumption chart

SONOFF POWCT

Yes

Manufacturer source

Historical data can be exported.

SONOFF POWCT manufacturer product page →

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

The dry contact is not a 100 A load-switching output. Follow the electrical installation instructions.

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

Catalog note

History can be exported to a file from the eWeLink app

Data History

Shelly Pro EM-50

60 days

Catalog note

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

SONOFF POWCT

6 months

Manufacturer source

Hourly history is available for up to six months.

SONOFF POWCT manufacturer product page →

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

The dry contact is not a 100 A load-switching output. Follow the electrical installation instructions.

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

Catalog note

Hour-by-hour records kept on the device, survives power cuts

Energy Cost Tracking

Shelly Pro EM-50: Yes
SONOFF POWCT: Not recorded

Real Time Updates

Shelly Pro EM-50: Not recorded
SONOFF POWCT: Not recorded

Time Of Use Rates

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

Usage Alerts

Shelly Pro EM-50: Yes
SONOFF POWCT: Yes
Catalog note
Overload alerts and protection thresholds

Features

Automations

Shelly Pro EM-50: Yes
SONOFF POWCT: Yes

Load Management

Shelly Pro EM-50: Yes
Catalog note
Configurable load control to divert surplus PV production
SONOFF POWCT: Yes
Catalog note
Overload protection switches the contactor off above the configured threshold

Relay Output

Shelly Pro EM-50

Yes

Catalog note

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

SONOFF POWCT

Yes

Manufacturer source

A 2 A dry-contact output can control an external contactor.

SONOFF POWCT manufacturer product page →

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

The dry contact is not a 100 A load-switching output. Follow the electrical installation instructions.

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

Catalog note

Dry contact rated 2 A for contactor control

Installation

Breaker Panel Install

Shelly Pro EM-50: Yes
SONOFF POWCT: Yes

Din Rail Mount

Shelly Pro EM-50: Yes
Catalog note
One DIN module wide
SONOFF POWCT: Yes

Power Supply

Shelly Pro EM-50: Mains (100-260 V)
SONOFF POWCT: Mains (100-240 V)

Smart Meter Port

Shelly Pro EM-50: No
SONOFF POWCT: No

Integrations

Alexa

Shelly Pro EM-50: Yes
SONOFF POWCT: Yes

Apple Home

Shelly Pro EM-50: No
SONOFF POWCT: SONOFF Hub required
Catalog note
SONOFF lists this model among the eWeLink Wi-Fi devices its Matter bridges (Zigbee Bridge Ultra, iHost, NSPanel Pro) publish to Matter, which is how it reaches the Apple Home app.

Google Home

Shelly Pro EM-50: Yes
SONOFF POWCT: Yes

Home Assistant

Shelly Pro EM-50: Yes
SONOFF POWCT: Yes

Matter

Shelly Pro EM-50: No
SONOFF POWCT: SONOFF Hub required
Catalog note
The device is not Matter itself: SONOFF lists it among the eWeLink Wi-Fi models its Matter bridges (Zigbee Bridge Ultra, iHost, NSPanel Pro) republish into Matter.

SmartThings

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

Local Control

Local Api

Shelly Pro EM-50: Yes
Catalog note
RPC over HTTPS and WebSocket, UDP, webhooks, scripting and Modbus TCP
SONOFF POWCT: No
Catalog note
eWeLink LAN mode keeps control working without internet, but there is no documented device API

Local Web Interface

Shelly Pro EM-50: Yes
SONOFF POWCT: No

Mqtt

Shelly Pro EM-50: Yes
SONOFF POWCT: No

Metering

Accuracy

Shelly Pro EM-50: ±1%
Catalog note
Accuracy Class B for active energy, ±1% from 5 A to 50 A
SONOFF POWCT: Not recorded

Bidirectional Metering

Shelly Pro EM-50

Yes

Catalog note

4 quadrant measurement with a returned energy counter

SONOFF POWCT

Yes

Manufacturer source

The meter measures imported and exported energy.

SONOFF POWCT manufacturer product page →

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

The dry contact is not a 100 A load-switching output. Follow the electrical installation instructions.

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

Catalog note

Separate counter for exported energy

Branch Ct Rating

Shelly Pro EM-50: Not applicable / unspecified
SONOFF POWCT: Not applicable / unspecified

Included Ct Sensors

Shelly Pro EM-50: 2
Catalog note
2 x 50 A current transformers
SONOFF POWCT: 1
Catalog note
One split-core 100 A clamp

Main Ct Rating

Shelly Pro EM-50

50 A

SONOFF POWCT

100 A

Manufacturer source

The split-core current transformer measures up to 100 A.

SONOFF POWCT manufacturer product page →

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

The dry contact is not a 100 A load-switching output. Follow the electrical installation instructions.

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

Monitored Circuits

Shelly Pro EM-50: 2
SONOFF POWCT: 1

Power Factor

Shelly Pro EM-50: Yes
Catalog note
Active and apparent power, power factor, frequency and voltage
SONOFF POWCT: No
Catalog note
Reports voltage, current, power and energy, but no power factor

Split Phase

Shelly Pro EM-50: No
Catalog note
Single-phase device with two current channels
SONOFF POWCT: No
Catalog note
Single clamp and one voltage input, so a 120/240 V split-phase service is out of scope

Three Phase

Shelly Pro EM-50: No
SONOFF POWCT: No

Specifications for Shelly Pro EM-50 versus SONOFF POWCT
Specification	Shelly Pro EM-50	SONOFF POWCT
Connectivity
2.4 GHz Wi-Fi	Yes	Yes Catalog note External antenna on a lead so it can sit outside the panel
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	No
Data Monitoring
Data Export	Yes Catalog note CSV export of the consumption chart	Yes Manufacturer source Historical data can be exported. SONOFF POWCT manufacturer product page → Source section Product description Model SONOFF POWCT Region Manufacturer product page; no universal regional compatibility implied Firmware Not specified by this source Checked 2026-10-04 The dry contact is not a 100 A load-switching output. Follow the electrical installation instructions. Document check only; not a hands-on test or verification of every regional or firmware variant. Catalog note History can be exported to a file from the eWeLink app
Data History	60 days Catalog note At least 60 days of 1-minute data stored on the device	6 months Manufacturer source Hourly history is available for up to six months. SONOFF POWCT manufacturer product page → Source section Product description Model SONOFF POWCT Region Manufacturer product page; no universal regional compatibility implied Firmware Not specified by this source Checked 2026-10-04 The dry contact is not a 100 A load-switching output. Follow the electrical installation instructions. Document check only; not a hands-on test or verification of every regional or firmware variant. Catalog note Hour-by-hour records kept on the device, survives power cuts
Energy Cost Tracking	Yes	Not recorded
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	Not recorded
Usage Alerts	Yes	Yes Catalog note Overload alerts and protection thresholds
Features
Automations	Yes	Yes
Load Management	Yes Catalog note Configurable load control to divert surplus PV production	Yes Catalog note Overload protection switches the contactor off above the configured threshold
Relay Output	Yes Catalog note Integrated switch with potential-free contacts, 2 A at 240 V	Yes Manufacturer source A 2 A dry-contact output can control an external contactor. SONOFF POWCT manufacturer product page → Source section Product description Model SONOFF POWCT Region Manufacturer product page; no universal regional compatibility implied Firmware Not specified by this source Checked 2026-10-04 The dry contact is not a 100 A load-switching output. Follow the electrical installation instructions. Document check only; not a hands-on test or verification of every regional or firmware variant. Catalog note Dry contact rated 2 A for contactor control
Installation
Breaker Panel Install	Yes	Yes
Din Rail Mount	Yes Catalog note One DIN module wide	Yes
Power Supply	Mains (100-260 V)	Mains (100-240 V)
Smart Meter Port	No	No
Integrations
Alexa	Yes	Yes
Apple Home	No	SONOFF Hub required Catalog note SONOFF lists this model among the eWeLink Wi-Fi devices its Matter bridges (Zigbee Bridge Ultra, iHost, NSPanel Pro) publish to Matter, which is how it reaches the Apple Home app.
Google Home	Yes	Yes
Home Assistant	Yes	Yes
Matter	No	SONOFF Hub required Catalog note The device is not Matter itself: SONOFF lists it among the eWeLink Wi-Fi models its Matter bridges (Zigbee Bridge Ultra, iHost, NSPanel Pro) republish into Matter.
SmartThings	Yes Catalog note Via the official Shelly Cloud integration	Yes
Local Control
Local Api	Yes Catalog note RPC over HTTPS and WebSocket, UDP, webhooks, scripting and Modbus TCP	No Catalog note eWeLink LAN mode keeps control working without internet, but there is no documented device API
Local Web Interface	Yes	No
Mqtt	Yes	No
Metering
Accuracy	±1% Catalog note Accuracy Class B for active energy, ±1% from 5 A to 50 A	Not recorded
Bidirectional Metering	Yes Catalog note 4 quadrant measurement with a returned energy counter	Yes Manufacturer source The meter measures imported and exported energy. SONOFF POWCT manufacturer product page → Source section Product description Model SONOFF POWCT Region Manufacturer product page; no universal regional compatibility implied Firmware Not specified by this source Checked 2026-10-04 The dry contact is not a 100 A load-switching output. Follow the electrical installation instructions. Document check only; not a hands-on test or verification of every regional or firmware variant. Catalog note Separate counter for exported energy
Branch Ct Rating	Not applicable / unspecified	Not applicable / unspecified
Included Ct Sensors	2 Catalog note 2 x 50 A current transformers	1 Catalog note One split-core 100 A clamp
Main Ct Rating	50 A	100 A Manufacturer source The split-core current transformer measures up to 100 A. SONOFF POWCT manufacturer product page → Source section Product description Model SONOFF POWCT Region Manufacturer product page; no universal regional compatibility implied Firmware Not specified by this source Checked 2026-10-04 The dry contact is not a 100 A load-switching output. Follow the electrical installation instructions. Document check only; not a hands-on test or verification of every regional or firmware variant.
Monitored Circuits	2	1
Power Factor	Yes Catalog note Active and apparent power, power factor, frequency and voltage	No Catalog note Reports voltage, current, power and energy, but no power factor
Split Phase	No Catalog note Single-phase device with two current channels	No Catalog note Single clamp and one voltage input, so a 120/240 V split-phase service is out of scope
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