Connect a Shelly energy meter

Shelly Gen2 and Gen3 devices (Pro 3EM, EM Gen3, Pro EM-50, Plug S Gen3, 1PM Gen3) send their measurements straight to FreeMaint over Wi-Fi or Ethernet. FreeMaint gives you a short script that already contains your access key: you paste it into the device once.

Before you start

• The Shelly is installed, powered and connected to your network with internet access.
• You can open its web page by typing its IP address in a browser on the same network.
• Your company is on the Business plan and you hold the Connect manage permission.

Pair the device

1. Create the connection — In Connected devices → Integrations, click Connect a device, choose Shelly (Wi-Fi / Ethernet), give it a name (for example: Main switchboard — Shelly) and create it.
2. Copy the script — FreeMaint shows the script once, with your access key inside. Copy it before closing the window.
3. Paste it into the Shelly — On the Shelly's web page, open Scripts → Create script, paste the script and save.
4. Start it for good — Click Start and turn on Run on startup, so the script starts again after a power cut.

What you get

Within a minute the device appears in Connected devices → Devices and its channels fill up. The script sends the measurements every 60 seconds: power, energy counters, voltage and current per phase, depending on the model.

• Energy counters are stored as totals that only go up: FreeMaint computes the consumption between two readings, even across a reset.
• Values sent in Wh are converted to kWh, so a Shelly and a utility meter add up correctly.
• If a model is not recognised automatically, choose it in the device's Model field.

Nothing arrives?