NexWattEnergy Intelligence
PLEN Sign in Create account

Shelly — relays, plugs and meters

You can connect Shelly in two ways: locally via an ESP32 connector on the same network (read every 15 s, works without internet) or via Shelly Cloud from the HEMS server (no connector, read every minute or less often). HEMS switches relays and plugs on and off with a command through the Command Gateway.

6 steps approx. 10 min connector or cloudcontrol
Create account

Step by step

  1. Locally: set a fixed IP address and disable the password

    Assign Shelly a fixed IP address in your router. In the Shelly app or in a browser (the device's IP address) disable authentication: Gen2–Gen4 — Settings → Authentication, Gen1 — Internet & Security → Restrict login. The connector does not support logging in to Shelly.

  2. Locally: add the device behind a connector

    Devices → Add → choose the driver: “Shelly relay / plug (Gen2, Gen3, Gen4)”, “Shelly Gen1 relay / plug”, “Shelly PM Mini”, meters “Shelly Pro 3EM”, “Shelly 3EM (Gen1)”, “Shelly EM (Gen1)” or “Shelly Pro EM-50”. Address: the Shelly IP, behind a connector with firmware 0.23 or newer.

  3. Devices with several outputs

    Pro 2PM, Pro 4PM, Shelly 2.5, Shelly EM and Pro EM-50 have several channels. Add each channel as a separate device with the same IP address, and on the device page choose the channel in “Driver settings” (output 1 = channel 0).

  4. Via Shelly Cloud: copy the key and the server

    Shelly app → User settings → Authorization cloud key: copy the key and the server address (e.g. shelly-103-eu.shelly.cloud). You will find the Device ID in the device → Settings → Device information.

  5. Via Shelly Cloud: add the device

    Devices → Add → model “Shelly relay / plug — Shelly Cloud” or “Shelly meter — Shelly Cloud”. Enter the server, Device ID, channel and key.

  6. Check switching on and off

    On the device page, in the “Relay” card, use “Enable” and “Disable”. In simulation mode the command does not reach the device — you change the mode in the site's control settings.

The Shelly Cloud key changes when the Shelly account password is changed — then add the device again with the new key.

Shelly Cloud accepts 1 request per second; for real-time control (e.g. PV surplus) local reading is better.

Grid connection meter: positive power = import from the grid. If it is the other way round, reverse the current transformer or set the direction in the Shelly app.

Integration not verified on devices — report differences from the Shelly app.

Create accountSign in All guides Contact