Developed and integrated OCPP Q11/Q12 offline duration support into the everest-core repository, focusing on enhancing V2X operations under intermittent connectivity. The work involved extending the connectivity manager to accurately track disconnection times and modifying the smart charging logic to validate charging profiles based on offline durations. Documentation was updated to reflect the new implementation, ensuring clarity for future development. The feature was delivered in C++ with an emphasis on embedded systems and OCPP protocol compliance, resulting in a clean integration into the OCPP v2 stack. No bug fixes were required, as the work centered on robust feature delivery and maintainability.