These are the two universal languages of the charging industry. OCPP (Open Charge Point Protocol) is the communication language between the charging station (hardware) and the central management system (software). OCPI (Open Charge Point Interface) is the communication language between different operator platforms to enable roaming and interoperability.

Analysis from an Application Environment Perspective

These two protocols construct the software ecosystem of the charging network.

• Asset Management & Operations (OCPP Application):
  CPOs use the OCPP protocol to remotely monitor the status of chargers scattered across a city. When a charger malfunctions, the backend sends reboot commands or retrieves diagnostic logs via OCPP. It allows operators to procure hardware from different brands while managing them with a single software system, breaking hardware vendor lock-in.
• Interconnected Ecosystem (OCPI Application):
  For navigation providers (like Google Maps) or aggregator charging Apps, OCPI is the bridge connecting data from thousands of operators. It allows users to see real-time status (available/occupied) of different operators’ stations directly on a map App and complete payments, serving as the technical cornerstone for a unified user experience.