NodOn 3CT Zigbee Energy Meter vs Sonoff MINI PM Matter Over WiFi Power Meter (Non-Switch)

The 2.4 GHz radio is Zigbee (IEEE 802.15.4), not Wi-Fi

IEEE 802.11 b/g/n on 2.4 GHz, from an ESP32-C6

The spec sheet lists Wi-Fi only, while the FCC grant authorises a second 2402-2480 MHz transmitter, so the radio is there but SONOFF never documents it as a feature

The datasheet and user guide document a Modbus RTU interface on RS-485 communication terminals, alongside the Zigbee radio

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, Jeedom, Zigbee2MQTT and Edalso as compatible gateways for this model

The Zigbee version of this meter is a separate model, the MINI-ZB1GP

Not a native NodOn feature. Exporting the readings is a function of the home automation platform.

Energy data and electricity bills export to a spreadsheet, from the app and from the local console

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

Up to one year of energy data, and going offline does not interrupt the recording

Not a native NodOn feature. Any cost figure is calculated by the home automation platform from the readings.

Custom currency and electricity rate, with the bill broken down in charts

NodOn advertises real-time monitoring of voltage, current, power and energy but publishes no reporting interval for this model

Not a native NodOn feature. Time-of-use pricing is a function of the home automation platform.

Fixed or time-of-use pricing, with consumption shown per rate band

Not a native NodOn feature. Usage alerts are built in the home automation platform from the readings.

Overcurrent, overpower, overvoltage and undervoltage thresholds, plus a run completion alert and a maintenance reminder based on accumulated runtime

NodOn lists load shedding on overconsumption, PV surplus diversion and EV-charge control 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

With no relay it can raise a threshold alert but cannot shed the load itself

One 18 mm DIN module, with the snap-in split-core clamps closing around the phase wires

Indoor flush mounting only, with no rail clip

Not compatible with Amazon Alexa.

Reached by adding the meter to eWeLink and linking the account, the path SONOFF documents for this model

Not compatible with Apple Home.

The meter is a Matter over Wi-Fi device, but SONOFF's own platform table marks Apple Home as not yet able to add it: the Home app still does not accept the Matter energy meter device type. Nothing on SONOFF's side is missing, so the meter gets in once Apple supports that type.

Not compatible with Google Home.

Reached by adding the meter to eWeLink and linking the account, the path SONOFF documents for this model

The radio is Zigbee 3.0 only, with no Matter certification or Matter path documented for this model

Matter over Wi-Fi: the device carries a Matter QR code and is commissioned by scanning it from a Matter app | Home Assistant is the one Matter controller that accepts it today, because the energy meter device type is not yet handled by the other ecosystems

Not compatible with Samsung SmartThings.

Reached through eWeLink account linking, and SONOFF notes SmartThings also reads the power consumption figures

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

The OpenEdge web console runs on the device and needs no app and no account

No native MQTT, though Zigbee2MQTT republishes the readings

MQTT is configured from the device itself and is how Home Assistant reads the meter with no cloud in the path

Class 1.0 to IEC 61557-12, stated as a 1% tolerance, with a measurement range of 50 mA to 70 A/120 A per phase

Three split-core current transformers, rated 70 A (SEM-4-3-20_70A) or 120 A (SEM-4-3-20_120A) depending on the variant | The clamps snap around the phase conductors, so no circuit has to be rewired through the meter

Inline measurement, no current transformer involved

120 A per phase on the SEM-4-3-20_120A variant, or 70 A on the SEM-4-3-20_70A variant

Three phases on one 3P+N supply, or three independent single-phase circuits

One circuit, the load wired through its L and L Out terminals

Voltage, current, active and reactive power, apparent power and power factor per phase, plus AC frequency | Zigbee2MQTT exposes power_factor, power_reactive and power_apparent for phases A, B and C

SONOFF documents real-time voltage, current, power and accumulated energy, with no power factor reading

3P+N wiring with one current clamp per phase (IA, IB, IC) and phase-to-neutral or phase-to-phase voltage taps