OCPP

Open Charge Point Protocol: the open protocol between a charger and its operator's backend.

Explained in

EV charging fundamentals · Stop 03What happens after you tap your card?Follow one tap from the card reader to the operator's backend and, for another company's card, across the roaming route and back. OCPP and OCPI in action.

OCPP connects the charger with its own operator's backend: status, meter values, authorisations, start and stop.

From “Two protocols with two jobs”, stop 03

Also in

  1. EV charging fundamentals · Stop 08Which standards and rules make all of this work?Three standards for connections, one regulation for duties
  2. Charging hardware · Stop 04What is inside a DC charger?Connected by law
  3. Load management · Stop 01Why can't every car charge at full power?Why the connection is smaller
  4. OCPP in depth · Stop 01What is OCPP for?One language for many manufacturers
  5. OCPI and roaming · Stop 04How does a token reach the charger?From the list to the charger
  6. Plug & Charge · Stop 02How do car and charger talk to each other?More than identification
  7. Bidirectional charging · Stop 04Which standards make it work?Charger to backend: OCPP 2.1
  8. Payments and billing · Stop 02When must the price be shown?How the screen gets the price

Named in 34 further stops as well.

  1. OCPIOpen Charge Point Interface: an open protocol for roaming between operators and e-mobility service providers.
  2. OICPOpen InterCharge Protocol: the roaming protocol of the Hubject platform.
  3. Roaming hubA platform that connects many operators and service providers, each through one connection.
  4. RoamingCharging in another company's network with your own card or app.
  1. Open Charge Alliance: Open Charge Point Protocol (OCPP). https://openchargealliance.org/protocols/open-charge-point-protocol/. Checked 07 Oct 2026.