The Smart Device Compare comparison

Refoss EM01P vs Shelly Pro EM-50

Understand the differences. Decide what matters to your home.

Before you compare every specification

Key differences between Refoss EM01P 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): Refoss EM01P — No; Shelly Pro EM-50 — Yes.
Time Of Use Rates (data monitoring): Refoss EM01P — No; Shelly Pro EM-50 — Yes (Cost periods and tariff distribution in the Shelly Smart Control app).
Load Management (features): Refoss EM01P — No; Shelly Pro EM-50 — Yes (Configurable load control to divert surplus PV production).
Relay Output (features): Refoss EM01P — No; Shelly Pro EM-50 — Yes (Integrated switch with potential-free contacts, 2 A at 240 V).

Specifications to check side by side

Other (connectivity): Refoss EM01P — No; Shelly Pro EM-50 — Modbus.
Data History (data monitoring): Refoss EM01P — 5 years (Local storage plus free cloud, daily data kept up to 5 years); Shelly Pro EM-50 — 60 days (At least 60 days of 1-minute data stored on the device).
Power Supply (installation): Refoss EM01P — USB; Shelly Pro EM-50 — Mains (100-260 V).
Monitored Circuits (metering): Refoss EM01P — 1 (Whole-house totals as reported by the utility meter, no per-circuit detail); Shelly Pro EM-50 — 2.

Information still to confirm

9 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 · Refoss

Refoss EM01P

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.

15differences with recorded values for every device

9rows 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

Refoss EM01P: Yes
Shelly Pro EM-50: Yes

5 GHz Wi-Fi

Refoss EM01P: No
Shelly Pro EM-50: No

Bluetooth

Refoss EM01P: Not recorded
Shelly Pro EM-50: Yes
Catalog note
Bluetooth 4.2, also works as a Bluetooth gateway

Ethernet

Refoss EM01P: No
Shelly Pro EM-50: Yes

Other

Refoss EM01P: No
Shelly Pro EM-50: Modbus

Thread

Refoss EM01P: No
Shelly Pro EM-50: No

Z Wave

Refoss EM01P: No
Shelly Pro EM-50: No

Zigbee

Refoss EM01P: No
Shelly Pro EM-50: No

Data Monitoring

Data Export

Refoss EM01P: Yes
Catalog note
Daily, weekly and monthly reports for consumption and feed-in
Shelly Pro EM-50: Yes
Catalog note
CSV export of the consumption chart

Data History

Refoss EM01P: 5 years
Catalog note
Local storage plus free cloud, daily data kept up to 5 years
Shelly Pro EM-50: 60 days
Catalog note
At least 60 days of 1-minute data stored on the device

Energy Cost Tracking

Refoss EM01P: Yes
Shelly Pro EM-50: Yes

Real Time Updates

Refoss EM01P: 1 min
Catalog note
Minute-level real-time power data
Shelly Pro EM-50: Not recorded

Time Of Use Rates

Refoss EM01P: No
Shelly Pro EM-50: Yes
Catalog note
Cost periods and tariff distribution in the Shelly Smart Control app

Usage Alerts

Refoss EM01P: Not recorded
Shelly Pro EM-50: Yes

Features

Automations

Refoss EM01P: Yes
Shelly Pro EM-50: Yes

Load Management

Refoss EM01P: No
Shelly Pro EM-50: Yes
Catalog note
Configurable load control to divert surplus PV production

Relay Output

Refoss EM01P: No
Shelly Pro EM-50: Yes
Catalog note
Integrated switch with potential-free contacts, 2 A at 240 V

Installation

Breaker Panel Install

Refoss EM01P: No
Catalog note
Magnetic mount on the meter face, no wiring and no panel work
Shelly Pro EM-50: Yes

Din Rail Mount

Refoss EM01P: No
Shelly Pro EM-50: Yes
Catalog note
One DIN module wide

Power Supply

Refoss EM01P: USB
Shelly Pro EM-50: Mains (100-260 V)

Smart Meter Port

Refoss EM01P: Yes
Catalog note
Optical head for SML and IEC 62056 smart meters, some need a PIN from the utility
Shelly Pro EM-50: No

Integrations

Alexa

Refoss EM01P: 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
Shelly Pro EM-50: Yes

Apple Home

Refoss EM01P: No
Shelly Pro EM-50: No

Google Home

Refoss EM01P: No
Shelly Pro EM-50: Yes

Home Assistant

Refoss EM01P

Yes

Manufacturer source

Home Assistant integration is documented.

Refoss EM01P manufacturer product page →

Source section: Product description
Model: Refoss EM01P
Region: Manufacturer product page; no universal regional compatibility implied
Firmware: Not specified by this source
Checked: 2026-10-04

This optical reading head requires a compatible European smart meter; it is not a universal clamp meter.

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

Catalog note

Plug-and-play, no custom plugins required

Shelly Pro EM-50

Yes

Matter

Refoss EM01P: No
Shelly Pro EM-50: No

SmartThings

Refoss EM01P: No
Shelly Pro EM-50: Yes
Catalog note
Via the official Shelly Cloud integration

Local Control

Local Api

Refoss EM01P

Yes

Manufacturer source

A local API is available.

Refoss EM01P manufacturer product page →

Source section: Product description
Model: Refoss EM01P
Region: Manufacturer product page; no universal regional compatibility implied
Firmware: Not specified by this source
Checked: 2026-10-04

This optical reading head requires a compatible European smart meter; it is not a universal clamp meter.

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

Catalog note

Refoss Open API with JSON-RPC 2.0, works with the cloud switched off

Shelly Pro EM-50

Yes

Catalog note

RPC over HTTPS and WebSocket, UDP, webhooks, scripting and Modbus TCP

Local Web Interface

Refoss EM01P: Yes
Catalog note
Built-in web interface for configuration and live readings
Shelly Pro EM-50: Yes

Mqtt

Refoss EM01P

Yes

Manufacturer source

MQTT is supported.

Refoss EM01P manufacturer product page →

Source section: Product description
Model: Refoss EM01P
Region: Manufacturer product page; no universal regional compatibility implied
Firmware: Not specified by this source
Checked: 2026-10-04

This optical reading head requires a compatible European smart meter; it is not a universal clamp meter.

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

Shelly Pro EM-50

Yes

Metering

Accuracy

Refoss EM01P: Not applicable / unspecified
Catalog note
Reads the utility meter's own registers, so accuracy is the meter's
Shelly Pro EM-50: ±1%
Catalog note
Accuracy Class B for active energy, ±1% from 5 A to 50 A

Bidirectional Metering

Refoss EM01P: Yes
Catalog note
Reports both consumption and feed-in registers
Shelly Pro EM-50: Yes
Catalog note
4 quadrant measurement with a returned energy counter

Branch Ct Rating

Refoss EM01P: Not applicable / unspecified
Shelly Pro EM-50: Not applicable / unspecified

Included Ct Sensors

Refoss EM01P: Not applicable / unspecified
Catalog note
Optical reading head, no current transformers involved
Shelly Pro EM-50: 2
Catalog note
2 x 50 A current transformers

Main Ct Rating

Refoss EM01P: Not applicable / unspecified
Shelly Pro EM-50: 50 A

Monitored Circuits

Refoss EM01P: 1
Catalog note
Whole-house totals as reported by the utility meter, no per-circuit detail
Shelly Pro EM-50: 2

Power Factor

Refoss EM01P: No
Shelly Pro EM-50: Yes
Catalog note
Active and apparent power, power factor, frequency and voltage

Split Phase

Refoss EM01P: Not applicable / unspecified
Shelly Pro EM-50: No
Catalog note
Single-phase device with two current channels

Three Phase

Refoss EM01P: Not applicable / unspecified
Shelly Pro EM-50: No

Specifications for Refoss EM01P versus Shelly Pro EM-50
Specification	Refoss EM01P	Shelly Pro EM-50
Connectivity
2.4 GHz Wi-Fi	Yes	Yes
5 GHz Wi-Fi	No	No
Bluetooth	Not recorded	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 Daily, weekly and monthly reports for consumption and feed-in	Yes Catalog note CSV export of the consumption chart
Data History	5 years Catalog note Local storage plus free cloud, daily data kept up to 5 years	60 days Catalog note At least 60 days of 1-minute data stored on the device
Energy Cost Tracking	Yes	Yes
Real Time Updates	1 min Catalog note Minute-level real-time power data	Not recorded
Time Of Use Rates	No	Yes Catalog note Cost periods and tariff distribution in the Shelly Smart Control app
Usage Alerts	Not recorded	Yes
Features
Automations	Yes	Yes
Load Management	No	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	No Catalog note Magnetic mount on the meter face, no wiring and no panel work	Yes
Din Rail Mount	No	Yes Catalog note One DIN module wide
Power Supply	USB	Mains (100-260 V)
Smart Meter Port	Yes Catalog note Optical head for SML and IEC 62056 smart meters, some need a PIN from the utility	No
Integrations
Alexa	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	Yes
Apple Home	No	No
Google Home	No	Yes
Home Assistant	Yes Manufacturer source Home Assistant integration is documented. Refoss EM01P manufacturer product page → Source section Product description Model Refoss EM01P Region Manufacturer product page; no universal regional compatibility implied Firmware Not specified by this source Checked 2026-10-04 This optical reading head requires a compatible European smart meter; it is not a universal clamp meter. Document check only; not a hands-on test or verification of every regional or firmware variant. Catalog note Plug-and-play, no custom plugins required	Yes
Matter	No	No
SmartThings	No	Yes Catalog note Via the official Shelly Cloud integration
Local Control
Local Api	Yes Manufacturer source A local API is available. Refoss EM01P manufacturer product page → Source section Product description Model Refoss EM01P Region Manufacturer product page; no universal regional compatibility implied Firmware Not specified by this source Checked 2026-10-04 This optical reading head requires a compatible European smart meter; it is not a universal clamp meter. Document check only; not a hands-on test or verification of every regional or firmware variant. Catalog note Refoss Open API with JSON-RPC 2.0, works with the cloud switched off	Yes Catalog note RPC over HTTPS and WebSocket, UDP, webhooks, scripting and Modbus TCP
Local Web Interface	Yes Catalog note Built-in web interface for configuration and live readings	Yes
Mqtt	Yes Manufacturer source MQTT is supported. Refoss EM01P manufacturer product page → Source section Product description Model Refoss EM01P Region Manufacturer product page; no universal regional compatibility implied Firmware Not specified by this source Checked 2026-10-04 This optical reading head requires a compatible European smart meter; it is not a universal clamp meter. Document check only; not a hands-on test or verification of every regional or firmware variant.	Yes
Metering
Accuracy	Not applicable / unspecified Catalog note Reads the utility meter's own registers, so accuracy is the meter's	±1% Catalog note Accuracy Class B for active energy, ±1% from 5 A to 50 A
Bidirectional Metering	Yes Catalog note Reports both consumption and feed-in registers	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 Optical reading head, no current transformers involved	2 Catalog note 2 x 50 A current transformers
Main Ct Rating	Not applicable / unspecified	50 A
Monitored Circuits	1 Catalog note Whole-house totals as reported by the utility meter, no per-circuit detail	2
Power Factor	No	Yes Catalog note Active and apparent power, power factor, frequency and voltage
Split Phase	Not applicable / unspecified	No Catalog note Single-phase device with two current channels
Three Phase	Not applicable / unspecified	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