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Connecting a charging station to watt.ma is the first step toward monitoring your fleet and enabling users to charge. This guide explains how to retrieve your OCPP server URL, configure it on the station, then verify that the connection is successfully established from the dashboard.
watt.ma supports only the OCPP 1.6J protocol (JSON over WebSocket). Make sure your station is compatible with this version before beginning.

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Prerequisites

  • A charging station compatible with OCPP 1.6J (Alfen, ABB, Ratio, Teison, or other)
  • Access to the station’s administration interface (touch screen, manufacturer app, or local web portal)
  • An active account on watt.ma

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Connection Steps

1

Retrieve the OCPP server URL

Sign in to watt.ma, then go to Stations > Add a station. watt.ma automatically generates a unique OCPP server URL for your account, for example:
Copy this URL. It identifies your account and allows the station to authenticate with watt.ma.
2

Configure the station

From your station’s administration interface, access the network or OCPP settings. Fill in the following fields:
  • OCPP backend URL: paste the URL copied in the previous step
  • Protocol: WebSocket (wss://)
  • OCPP version: 1.6J
  • ChargeBox ID: unique identifier for the station (often its serial number)
Save the configuration and restart the station if the manufacturer requires it.
3

Verify the connection in watt.ma

Return to watt.ma, open the Dashboard, and locate your new station. If the connection is successful, the status changes to Online in green within two minutes. The connectors then appear as available.
Before putting the station into production, launch a test session from the dashboard or with an RFID card. Verify that the session appears correctly in Sessions > Session tracking with the right consumption and pricing.

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Common Issues

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Next Steps