Industry jargon

High-Level Communication

Also called: HLC High-Level Communication, or HLC, is digital communication between an EV and EVSE used in addition to the basic charging signalling defined for the charging interface. ISO 15118 uses HLC to exchange the richer information needed for functions such as Plug & Charge and managed charging. For wired ISO 15118-3 communication, the EV and EVSE establish the data link over the charging connection using power-line communication. ISO 15118 also defines other physical-layer options in later parts of the standards family. HLC is separate from OCPP. HLC carries vehicle-to-EVSE communication, while OCPP normally connects the charging station to its CSMS.