The Smart Device Compare comparison

NodOn Zigbee Smart Energy Monitor vs Shelly Pro 3EM v2

Understand the differences. Decide what matters to your home.

Before you compare every specification

Key differences between NodOn Zigbee Smart Energy Monitor and Shelly Pro 3EM v2

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): NodOn Zigbee Smart Energy Monitor — No (The 2.4 GHz radio is Zigbee (IEEE 802.15.4), not Wi-Fi); Shelly Pro 3EM v2 — Yes.
Bluetooth (connectivity): NodOn Zigbee Smart Energy Monitor — No; Shelly Pro 3EM v2 — Yes (Also works as a Bluetooth gateway).
Ethernet (connectivity): NodOn Zigbee Smart Energy Monitor — No; Shelly Pro 3EM v2 — Yes.
Data Export (data monitoring): NodOn Zigbee Smart Energy Monitor — No (Not a native NodOn feature. Exporting the readings is a function of the home automation platform.); Shelly Pro 3EM v2 — Yes (CSV for power quality values and JSON through RPC).

Specifications to check side by side

Other (connectivity): NodOn Zigbee Smart Energy Monitor — No; Shelly Pro 3EM v2 — Modbus.
Zigbee (connectivity): NodOn Zigbee Smart Energy Monitor — Zigbee Hub required (Zigbee 3.0 certified, 2.4 GHz, maximum radio power +10 dBm, so it joins an existing Zigbee network and needs a compatible coordinator or gateway | NodOn lists Home Assistant, SmartThings, Jeedom and Zigbee2MQTT as compatible gateways for this model); Shelly Pro 3EM v2 — No.
Power Supply (installation): NodOn Zigbee Smart Energy Monitor — Mains (110-240 V); Shelly Pro 3EM v2 — Mains (100-260 V).
Monitored Circuits (metering): NodOn Zigbee Smart Energy Monitor — 1 (One 1P+N circuit: the line is wired through the meter's own terminals and the neutral passes alongside, so it meters a single circuit up to 63 A); Shelly Pro 3EM v2 — 3 (Three phases, or three single-phase circuits).

Information still to confirm

6 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 · NodOn

NodOn Zigbee Smart Energy Monitor

Last updated October 2026

View full device profile

Option 2 · Shelly

Shelly Pro 3EM v2

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.

19differences with recorded values for every device

6rows with missing or unspecified information

Consider your setup

Apple Home

NodOn Zigbee Smart Energy MonitorNo
Shelly Pro 3EM v2Yes

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

NodOn Zigbee Smart Energy MonitorNo
Shelly Pro 3EM v2Yes

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

NodOn Zigbee Smart Energy Monitor: No
Catalog note
The 2.4 GHz radio is Zigbee (IEEE 802.15.4), not Wi-Fi
Shelly Pro 3EM v2: Yes

5 GHz Wi-Fi

NodOn Zigbee Smart Energy Monitor: No
Shelly Pro 3EM v2: No

Bluetooth

NodOn Zigbee Smart Energy Monitor: No
Shelly Pro 3EM v2: Yes
Catalog note
Also works as a Bluetooth gateway

Ethernet

NodOn Zigbee Smart Energy Monitor: No
Shelly Pro 3EM v2: Yes

Other

NodOn Zigbee Smart Energy Monitor: No
Shelly Pro 3EM v2: Modbus

Thread

NodOn Zigbee Smart Energy Monitor: No
Shelly Pro 3EM v2: No

Z Wave

NodOn Zigbee Smart Energy Monitor: No
Shelly Pro 3EM v2: No

Zigbee

NodOn Zigbee Smart Energy Monitor: Zigbee Hub required
Catalog note
Zigbee 3.0 certified, 2.4 GHz, maximum radio power +10 dBm, so it joins an existing Zigbee network and needs a compatible coordinator or gateway | NodOn lists Home Assistant, SmartThings, Jeedom and Zigbee2MQTT as compatible gateways for this model
Shelly Pro 3EM v2: No

Data Monitoring

Data Export

NodOn Zigbee Smart Energy Monitor: No
Catalog note
Not a native NodOn feature. Exporting the readings is a function of the home automation platform.
Shelly Pro 3EM v2: Yes
Catalog note
CSV for power quality values and JSON through RPC

Data History

NodOn Zigbee Smart Energy Monitor: Not applicable / unspecified
Catalog note
The meter keeps no history of its own beyond its cumulative energy registers, and NodOn ships no app: retention is whatever the host gateway or Home Assistant keeps
Shelly Pro 3EM v2: 45 days
Catalog note
At least 45 days of 1-minute data in non-volatile memory

Energy Cost Tracking

NodOn Zigbee Smart Energy Monitor: No
Catalog note
Not a native NodOn feature. Any cost figure is calculated by the home automation platform from the readings.
Shelly Pro 3EM v2: Yes

Real Time Updates

NodOn Zigbee Smart Energy Monitor: Yes
Catalog note
NodOn advertises real-time monitoring of voltage, current, power and energy but publishes no reporting interval for this model
Shelly Pro 3EM v2: Not recorded

Time Of Use Rates

NodOn Zigbee Smart Energy Monitor: No
Catalog note
Not a native NodOn feature. Time-of-use pricing is a function of the home automation platform.
Shelly Pro 3EM v2: Yes
Catalog note
Cost periods and tariff distribution in the Shelly Smart Control app

Usage Alerts

NodOn Zigbee Smart Energy Monitor: No
Catalog note
Not a native NodOn feature. Usage alerts are built in the home automation platform from the readings.
Shelly Pro 3EM v2: Yes

Features

Automations

NodOn Zigbee Smart Energy Monitor: Yes
Catalog note
Through the compatible Zigbee gateway or Home Assistant, not on the device itself
Shelly Pro 3EM v2: Yes

Load Management

NodOn Zigbee Smart Energy Monitor: Yes
Catalog note
NodOn lists load shedding on overconsumption among the meter's uses, driven by its readings | The switching itself is done by the compatible gateway or home automation system, not by the meter, which has no relay
Shelly Pro 3EM v2: Yes
Catalog note
Scripts and webhooks shed or enable loads from PV production

Relay Output

NodOn Zigbee Smart Energy Monitor: No
Catalog note
No switching output: the meter measures only and has no relay to cut a load
Shelly Pro 3EM v2: No
Catalog note
No built-in relay, contactor control needs the Shelly 3EM Switch Add-on

Installation

Breaker Panel Install

NodOn Zigbee Smart Energy Monitor: Yes
Catalog note
Installed in-line inside the electrical panel on an existing circuit, next to the upstream protection device
Shelly Pro 3EM v2: Yes

Din Rail Mount

NodOn Zigbee Smart Energy Monitor: Yes
Catalog note
One 17.8 mm wide DIN module that clips onto the standard 35 mm rail inside the switchboard
Shelly Pro 3EM v2: Yes
Catalog note
One DIN module wide

Power Supply

NodOn Zigbee Smart Energy Monitor: Mains (110-240 V)
Shelly Pro 3EM v2: Mains (100-260 V)

Smart Meter Port

NodOn Zigbee Smart Energy Monitor: No
Shelly Pro 3EM v2: No

Integrations

Alexa

NodOn Zigbee Smart Energy Monitor: No
Catalog note
Not compatible with Amazon Alexa.
Shelly Pro 3EM v2: Yes

Apple Home

NodOn Zigbee Smart Energy Monitor: No
Catalog note
Not compatible with Apple Home.
Shelly Pro 3EM v2: Yes
Catalog note
Via Matter

Google Home

NodOn Zigbee Smart Energy Monitor: No
Catalog note
Not compatible with Google Home.
Shelly Pro 3EM v2: Yes

Home Assistant

NodOn Zigbee Smart Energy Monitor: Yes
Catalog note
Zigbee2MQTT supports this exact model, the SEM-4-1-00, and exposes power, voltage, current, AC frequency, power factor, apparent power and both consumed and produced energy | NodOn also lists Home Assistant among the compatible gateways for this model | Works with Home Assistant through ZHA and through Zigbee2MQTT.
Shelly Pro 3EM v2: Yes

Matter

NodOn Zigbee Smart Energy Monitor: No
Catalog note
The radio is Zigbee 3.0 only, with no Matter certification or Matter path documented for this model
Shelly Pro 3EM v2: Yes
Catalog note
Matter-ready, enabled from the device settings

SmartThings

NodOn Zigbee Smart Energy Monitor: Yes
Catalog note
NodOn lists SmartThings among the compatible gateways for this model, so it pairs with a SmartThings hub as a standard Zigbee 3.0 device
Shelly Pro 3EM v2: Yes

Local Control

Local Api

NodOn Zigbee Smart Energy Monitor: No
Catalog note
A Zigbee end device with no IP stack and no documented serial interface, so there is nothing on the module itself to call directly; the data path belongs to whichever gateway hosts it
Shelly Pro 3EM v2: Yes
Catalog note
RPC over HTTP and WebSocket with TLS, plus webhooks and scripting

Local Web Interface

NodOn Zigbee Smart Energy Monitor: No
Catalog note
Nothing runs on the module itself: it is paired and configured from the Zigbee gateway, and it has only a status LED and a reset/pairing button
Shelly Pro 3EM v2: Yes

Mqtt

NodOn Zigbee Smart Energy Monitor: No
Catalog note
No native MQTT, though Zigbee2MQTT republishes the readings
Shelly Pro 3EM v2: Yes

Metering

Accuracy

NodOn Zigbee Smart Energy Monitor

±1%

Manufacturer source

The stated energy-measurement tolerance is one percent.

NodOn Zigbee Smart Energy Monitor manufacturer product page →

Source section: SEM-4-1-00 features and technical data
Model: NodOn Zigbee Smart Energy Monitor
Region: Manufacturer product page; no universal regional compatibility implied
Firmware: Not specified by this source
Checked: 2026-10-04

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

Catalog note

Class 1.0 to IEC 61557-12, stated as a 1% tolerance, over a measurement range of 50 mA to 63 A and a base current of 10 A

Shelly Pro 3EM v2

±1%

Catalog note

Accuracy Class B for active energy, ±1% voltage and ±1% current from 2 A to 120 A

Bidirectional Metering

NodOn Zigbee Smart Energy Monitor

Yes

Manufacturer source

Bidirectional measurement is specified.

NodOn Zigbee Smart Energy Monitor manufacturer product page →

Source section: SEM-4-1-00 features and technical data
Model: NodOn Zigbee Smart Energy Monitor
Region: Manufacturer product page; no universal regional compatibility implied
Firmware: Not specified by this source
Checked: 2026-10-04

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

Catalog note

Bidirectional measurement reports consumption and production separately, which is what makes solar self-consumption and export readable | Zigbee2MQTT exposes the consumed total as energy and the production side as produced_energy for this exact model

Shelly Pro 3EM v2

Yes

Catalog note

4 quadrant measurement, imported and exported energy per phase

Branch Ct Rating

NodOn Zigbee Smart Energy Monitor: Not applicable / unspecified
Shelly Pro 3EM v2: Not applicable / unspecified

Included Ct Sensors

NodOn Zigbee Smart Energy Monitor: Not applicable / unspecified
Catalog note
Inline measurement through the module's own terminals, with no current transformer involved
Shelly Pro 3EM v2: 3
Catalog note
3 x 120 A current transformers

Main Ct Rating

NodOn Zigbee Smart Energy Monitor: Not applicable / unspecified
Catalog note
Rated up to 63 A directly on the circuit, without a current transformer
Shelly Pro 3EM v2: 120 A

Monitored Circuits

NodOn Zigbee Smart Energy Monitor

Manufacturer source

The meter monitors one circuit.

NodOn Zigbee Smart Energy Monitor manufacturer product page →

Source section: SEM-4-1-00 features and technical data
Model: NodOn Zigbee Smart Energy Monitor
Region: Manufacturer product page; no universal regional compatibility implied
Firmware: Not specified by this source
Checked: 2026-10-04

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

Catalog note

One 1P+N circuit: the line is wired through the meter's own terminals and the neutral passes alongside, so it meters a single circuit up to 63 A

Shelly Pro 3EM v2

Catalog note

Three phases, or three single-phase circuits

Power Factor

NodOn Zigbee Smart Energy Monitor: Yes
Catalog note
Reports voltage, current, active power, apparent power, power factor and AC frequency alongside the energy totals | Zigbee2MQTT exposes power_factor, power_apparent and ac_frequency for this exact model
Shelly Pro 3EM v2: Yes
Catalog note
Active and apparent power and energy, power factor, fundamental reactive energy

Split Phase

NodOn Zigbee Smart Energy Monitor: No
Catalog note
Rated 110-240 V AC 50/60 Hz as a 1P+N single-phase meter, so a 120/240 V North American split-phase service with two hot legs is out of scope
Shelly Pro 3EM v2: Not recorded

Three Phase

NodOn Zigbee Smart Energy Monitor: No
Shelly Pro 3EM v2: Yes

Specifications for NodOn Zigbee Smart Energy Monitor versus Shelly Pro 3EM v2
Specification	NodOn Zigbee Smart Energy Monitor	Shelly Pro 3EM v2
Connectivity
2.4 GHz Wi-Fi	No Catalog note The 2.4 GHz radio is Zigbee (IEEE 802.15.4), not Wi-Fi	Yes
5 GHz Wi-Fi	No	No
Bluetooth	No	Yes Catalog note 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 3.0 certified, 2.4 GHz, maximum radio power +10 dBm, so it joins an existing Zigbee network and needs a compatible coordinator or gateway \| NodOn lists Home Assistant, SmartThings, Jeedom and Zigbee2MQTT as compatible gateways for this model	No
Data Monitoring
Data Export	No Catalog note Not a native NodOn feature. Exporting the readings is a function of the home automation platform.	Yes Catalog note CSV for power quality values and JSON through RPC
Data History	Not applicable / unspecified Catalog note The meter keeps no history of its own beyond its cumulative energy registers, and NodOn ships no app: retention is whatever the host gateway or Home Assistant keeps	45 days Catalog note At least 45 days of 1-minute data in non-volatile memory
Energy Cost Tracking	No Catalog note Not a native NodOn feature. Any cost figure is calculated by the home automation platform from the readings.	Yes
Real Time Updates	Yes Catalog note NodOn advertises real-time monitoring of voltage, current, power and energy but publishes no reporting interval for this model	Not recorded
Time Of Use Rates	No Catalog note Not a native NodOn feature. Time-of-use pricing is a function of the home automation platform.	Yes Catalog note Cost periods and tariff distribution in the Shelly Smart Control app
Usage Alerts	No Catalog note Not a native NodOn feature. Usage alerts are built in the home automation platform from the readings.	Yes
Features
Automations	Yes Catalog note Through the compatible Zigbee gateway or Home Assistant, not on the device itself	Yes
Load Management	Yes Catalog note NodOn lists load shedding on overconsumption among the meter's uses, driven by its readings \| The switching itself is done by the compatible gateway or home automation system, not by the meter, which has no relay	Yes Catalog note Scripts and webhooks shed or enable loads from PV production
Relay Output	No Catalog note No switching output: the meter measures only and has no relay to cut a load	No Catalog note No built-in relay, contactor control needs the Shelly 3EM Switch Add-on
Installation
Breaker Panel Install	Yes Catalog note Installed in-line inside the electrical panel on an existing circuit, next to the upstream protection device	Yes
Din Rail Mount	Yes Catalog note One 17.8 mm wide DIN module that clips onto the standard 35 mm rail inside the switchboard	Yes Catalog note One DIN module wide
Power Supply	Mains (110-240 V)	Mains (100-260 V)
Smart Meter Port	No	No
Integrations
Alexa	No Catalog note Not compatible with Amazon Alexa.	Yes
Apple Home	No Catalog note Not compatible with Apple Home.	Yes Catalog note Via Matter
Google Home	No Catalog note Not compatible with Google Home.	Yes
Home Assistant	Yes Catalog note Zigbee2MQTT supports this exact model, the SEM-4-1-00, and exposes power, voltage, current, AC frequency, power factor, apparent power and both consumed and produced energy \| NodOn also lists Home Assistant among the compatible gateways for this model \| Works with Home Assistant through ZHA and through Zigbee2MQTT.	Yes
Matter	No Catalog note The radio is Zigbee 3.0 only, with no Matter certification or Matter path documented for this model	Yes Catalog note Matter-ready, enabled from the device settings
SmartThings	Yes Catalog note NodOn lists SmartThings among the compatible gateways for this model, so it pairs with a SmartThings hub as a standard Zigbee 3.0 device	Yes
Local Control
Local Api	No Catalog note A Zigbee end device with no IP stack and no documented serial interface, so there is nothing on the module itself to call directly; the data path belongs to whichever gateway hosts it	Yes Catalog note RPC over HTTP and WebSocket with TLS, plus webhooks and scripting
Local Web Interface	No Catalog note Nothing runs on the module itself: it is paired and configured from the Zigbee gateway, and it has only a status LED and a reset/pairing button	Yes
Mqtt	No Catalog note No native MQTT, though Zigbee2MQTT republishes the readings	Yes
Metering
Accuracy	±1% Manufacturer source The stated energy-measurement tolerance is one percent. NodOn Zigbee Smart Energy Monitor manufacturer product page → Source section SEM-4-1-00 features and technical data Model NodOn Zigbee Smart Energy Monitor Region Manufacturer product page; no universal regional compatibility implied Firmware Not specified by this source Checked 2026-10-04 Document check only; not a hands-on test or verification of every regional or firmware variant. Catalog note Class 1.0 to IEC 61557-12, stated as a 1% tolerance, over a measurement range of 50 mA to 63 A and a base current of 10 A	±1% Catalog note Accuracy Class B for active energy, ±1% voltage and ±1% current from 2 A to 120 A
Bidirectional Metering	Yes Manufacturer source Bidirectional measurement is specified. NodOn Zigbee Smart Energy Monitor manufacturer product page → Source section SEM-4-1-00 features and technical data Model NodOn Zigbee Smart Energy Monitor Region Manufacturer product page; no universal regional compatibility implied Firmware Not specified by this source Checked 2026-10-04 Document check only; not a hands-on test or verification of every regional or firmware variant. Catalog note Bidirectional measurement reports consumption and production separately, which is what makes solar self-consumption and export readable \| Zigbee2MQTT exposes the consumed total as energy and the production side as produced_energy for this exact model	Yes Catalog note 4 quadrant measurement, imported and exported energy per phase
Branch Ct Rating	Not applicable / unspecified	Not applicable / unspecified
Included Ct Sensors	Not applicable / unspecified Catalog note Inline measurement through the module's own terminals, with no current transformer involved	3 Catalog note 3 x 120 A current transformers
Main Ct Rating	Not applicable / unspecified Catalog note Rated up to 63 A directly on the circuit, without a current transformer	120 A
Monitored Circuits	1 Manufacturer source The meter monitors one circuit. NodOn Zigbee Smart Energy Monitor manufacturer product page → Source section SEM-4-1-00 features and technical data Model NodOn Zigbee Smart Energy Monitor Region Manufacturer product page; no universal regional compatibility implied Firmware Not specified by this source Checked 2026-10-04 Document check only; not a hands-on test or verification of every regional or firmware variant. Catalog note One 1P+N circuit: the line is wired through the meter's own terminals and the neutral passes alongside, so it meters a single circuit up to 63 A	3 Catalog note Three phases, or three single-phase circuits
Power Factor	Yes Catalog note Reports voltage, current, active power, apparent power, power factor and AC frequency alongside the energy totals \| Zigbee2MQTT exposes power_factor, power_apparent and ac_frequency for this exact model	Yes Catalog note Active and apparent power and energy, power factor, fundamental reactive energy
Split Phase	No Catalog note Rated 110-240 V AC 50/60 Hz as a 1P+N single-phase meter, so a 120/240 V North American split-phase service with two hot legs is out of scope	Not recorded
Three Phase	No	Yes

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