Shelly 3EM WiFi Energiemeter
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With the Shelly 3EM WiFi Energy Meter, you can easily and accurately monitor and record energy consumption wirelessly, for 3-phase or 3x 1-phase systems, such as your solar panels. Using the output relay, you can connect the Shelly 3EM to a Contactor and create smart switches in case of overload, preset consumption levels, or for example, through time schedules. Connect a 120A clamp to the neutral wire and monitor each phase for leakage or theft. The open-source nature ensures that you can integrate your Shelly 3EM with almost any home automation system. Shelly also offers a free app, allowing you to easily and affordably set up a smart home system without the cost of a gateway/hub.
The Shelly 3EM can monitor 3 phases or up to 3 groups;
Measure 3x Consumption (W)
Measure 3x Energy (Wh)
Measure 3x Load (max. 120A)
Measure 3x Load quality
Measure 1x Voltage (V)
Additionally;
365 days of built-in Energy (Wh) history
230VAC/10A Relay output for Contactor.
1x 120A N-clamp connection for theft or leakage detection (sold separately)
Install Shelly 3EM according to the user manual, connect via WiFi with the free Shelly app, and pair the module. It couldn't be simpler! Optionally, a 120A clamp for the phase N clamp connection can be supplied. Handy for monitoring theft or leakage. See the Downloads section for the manual on how to calibrate this N-clamp.
The Shelly 3EM Energy Meter with Contactor relay switch supports 110-230VAC and features a built-in ESP8266 with 4MB flash chip. This allows you to flash your own or alternative firmware, such as Tasmota. However, this requires a USB-to-UART 3.3V and a minimum 350mA adapter, such as our FTDI adapter. The great thing is, you don't even need to open the Shelly. Flashing is easy via the pins accessible on the outside.
NOTE: Never connect the Shelly 3EM to the power grid while flashing!
Also works with
If you prefer not to use the free Shelly cloud service but still want to control your devices remotely, no problem. Shelly 3EM also supports basic MQTT (Message Queue Telemetry Transport) for reliable connections through a central broker. The connected devices only communicate with the broker and do not know each other directly. Therefore, they don’t need to know the IP addresses or technical details of the other participants. This ensures safe and reliable communication, with real-time monitoring and easy integration. Want to learn more? Read our Shelly WiFi Switch Blog.
FEATURES
Pros and Cons
Open source | |
Works stand-alone via WiFi 2.4 GHz | |
Built-in web server | |
Access Point and Client Mode | |
Supports HTTP and/or UDP | |
Energy meter with Contactor Relay switch | |
Power supply 110-230VAC | |
Contactor Output Relay max. 230V/10A | |
Free Android or iOS App | |
Free Shelly cloud | |
Works with MQTT | |
Easy installation | |
Built-in, e.g., in meter box | |
Scene activation via App | |
ESP8266 with 4MB flash/debug chip | |
OTA firmware updates | |
Current measurement, stored locally for up to 365 days | |
3x120A clamps included | |
2-Year Carry-in warranty | |
Requires a Blue Neutral Wire | |
HomeKit requires Homebridge | |
4th N-Clamp not yet available |
DOWNLOADS
Shelly 3EM Manual (ENG) | |
How to calibrate Shelly N-clamp 120A (ENG) | |
Fibaro, Homey, Home Assistant integration | |
Add Shelly to App (NL) | |
Shelly REST API (ENG) |
Voltage: | |
Power: | |
Usage: | |
Protocol: | |
Dimension: |
Na 6 maanden de Shelly3EM in gebruik hebben gehad was ik verplicht om de firmware te updaten. Daarna werkten de metingen niet meer. Na verschillende keren down-en upgraden deed hij het helemaal niet meer. Gelukkig kon ik op de goede support van Home2Link rekenen en werd mij een nieuwe Shelly3EM toegestuurd die wel werkte zoals bedoeld.
Prima device om gezamenlijke of afzonderlijke fasen te meten of aparte groepen in je 3-fase meterkast.
Heeft me al veel inzicht in (sluip)verbruik per groep gegeven, omdat de klemmen vrij eenvoudig omgezet kunnen worden naar n andere groep en je zo je hele huis kunt doorlichten.
De extra (optionele) slimme schakelaar kan tevens handig zijn om bv een garagedeur of ander apparaat mee aan te sturen.
+ Gebruiksvriendelijk.
+/- Installatie vereist enige Elektro kennis!
Handig voor als je geen Slimme meter hebt (of wilt), maar toch je energieverbruik nauwkeurig wilt monitoren. Deze 3EM komt het best tot zijn recht als je hem monteert in je groepenkast. Wil je de 3EM gebruiken om een 3 fase aansluiting te monitoren? Let erop dat de 3EM dan een eigen 3fase voeding nodig heeft, afkomstig van een krachtgroep.
De meegeleverde CT's klik je om de te meten kabels heen. De klemmen zijn vrij groot, dus dat is even puzzelen voordat het past.
Eenmaal aangesloten is het een eitje, koppelen met WiFi en je kunt meteen per fase je verbruik/teruglevering inzien. In mijn geval gekoppeld met Home Assistant via MQTT. Werkt allemaal feilloos!