1. Overview
1.1 What is OCPP?
The Open Charge Point Protocol (OCPP) is an industry-standard open protocol used for communication between electric vehicle (EV) chargers and charging management systems.
Wallbox chargers support OCPP 1.6j, ensuring compatibility and efficient operation.
1.2 Acronyms and Conventions
Various acronyms are used throughout this guide. You can refer to this table as you read.
| Acronym | Model |
| OCPP | Open Charge Point Protocol |
| CSMS | Charging Station Management System |
| CP | Charging Point – the physical system where an EV can be charged |
| CPO | Charging Point Operator – person or team managing a set of CPs using a CSMS |
| VPN | Virtual Private Network |
| EV | Electric Vehicle |
| EMS | Energy Management System |
1.3 Additional information
For more details on OCPP, visit the official website: Open Charge Alliance.
2. Compatibility
2.1 Compatible Wallbox Chargers
All new Wallbox chargers support OCPP 1.6j.
If you’re unsure whether your older model supports OCPP, please contact Wallbox Customer Service.
2.1 Compatible Wallbox EMS
OCPP-enabled Wallbox chargers are compatible with Wallbox EMS features:
When using Wallbox EMS and OCPP Smart Charging simultaneously, charging limits will follow the most restrictive settings to ensure optimal performance.
3. OCPP Activation
3.1 Before starting
To connect your Wallbox charger to your CSMS using OCPP, ensure:
- Your charger has an active internet connection.
- Your provider has provided you with assurance of compatibility with the chargepoint.
Important Note: Wallbox cannot guarantee correct performance if your charger and CSMS haven’t passed a Factory Acceptance Test successfullysuccessfully passed a Factory Acceptance Test. If issues occur, contact [email protected] or your sales representative.
3.2 OCPP setup
3.2.1 Wallbox account setup
- Download the Wallbox app.
- If you do not yet own a Wallbox account, create one using this guide.
- Add your charger to your account following this article.
3.2.2 Charger Internet Connection Setup
Depending on your charger model, connect it to the internet using one of the following methods:
- Ethernet – plug in your Ethernet connector, and the Internet connection will start automatically.
- Wi-Fi – follow this article to connect your charger using Wi-Fi.
- Mobile Connectivity – configure mobile connectivity in the wallbox App
Using OCPP with a VPN
Check the network security section in the article How to Set Up Wallbox Chargers for Optimal Cloud Communication for instructions on how to set up your VPN to allow connectivity to Wallbox services.
3.2.3 OCPP Setup and Activation
Once your charger is connected to the internet:
- Log in to the app and select your charger.
- Confirm your charger is connected to the Cloud (internet).
- Tap Settings (cogwheel icon).
- Scroll to External Management and select OCPP.
- Choose your OCPP provider from the dropdown menu to auto-fill the URL field.
- If your provider isn’t listed, manually enter the CSMS URL provided by your OCPP provider.
- Enter your Charge Point ID (provided by your OCPP provider).
- Enter a password, if required by your provider.
Your charger will restart automatically. An OCPP icon will appear on your charger’s app overview screen.
If the OCPP settings don’t appear, contact Wallbox Customer Service to check charger compatibility.
3.2.4 Security Profile Level 2
Security Profile Level 2 provides enhanced security using a TLS certificate. To activate:
- Request the CA root certificate from your OCPP provider.
- Connect to your charger via Bluetooth.
- Upload the certificate through the Wallbox app to securely authenticate your charger with the management system.
3.4 OCPP connection status
Your Wallbox app will display the OCPP connection status clearly:
- Connected: Successful communication with your CSMS.
- Connecting: Attempting to establish connection; if persistent, verify settings or contact provider.
- Connection Rejected: Connection rejected by the CSMS; verify with your provider.
- Certificate Validation Failed: Incorrect TLS certificate; recheck or consult your provider.
3.5 Charger Features’ Use & Availability
Once connected via OCPP, some features must be managed via your CSMS:
- User access management
- Charger current limits
- OCPP features configuration and specific functionalities
The Wallbox app still allows essential tasks:
- Software updates
- Restart and restore the charger
- Network configurations
- External MID meter setup
- EMS features (Load Management, Solar Charging)
- Halo light stand-by
3.6 Using a charger connected via OCPP
Unlocking a charger
When your charger is connected via OCPP to your CSMS, users will be able to unlock the charger by:
- Using an RFID card
- Trigger a command from your OCPP Provider App or Portal
AuthEnabled in CSMS
If AuthEnabled is set to FALSE by your provider, the charger won’t require any authorisation to start a charge. By connecting the EV gun, the charger will start charging according to the car’s demand. The charger status LED will remain Yellow.
4. Troubleshooting
OCPP connection status remains in “Connecting”
Check the network connection status and setup of OCPP parametersnetwork connection status and OCPP parameters setup.
I can not start a new charge.
Check OCPP connection status, RFID authorisation and Charge Point availability with your Charge Point Operator.
I can not unlock the charger with the RFID card.
Confirm your RFID card is authorised by your CSMS. When OCPP is active, RFID UID is read as little-endian, hexadecimal, with no separators.