The electrical interface systems used for external power supply to railway vehicles are largely based on technical standards UIC 552 and UIC 554, developed in the 1970s. These standards focus solely on the transmission of electrical energy and are no longer adequate for modern railway applications. Several limitations of the current system can be identified:

• Energy consumption data from existing power supply points are typically gathered through manual meter readings, resulting in inefficient billing processes.
• Modern supply systems enable automated billing with user assignment, yet the requirement for physical identification tokens is often considered impractical by users.
• Load management under peak conditions is currently only possible through the manual shutdown of individual supply points.
• Vehicle-to-grid (V2G) energy feedback is fundamentally not supported.

To address these challenges, this study proposes an initial investigation into the potential adaptation and implementation of road vehicle charging standards—particularly ISO 15118—for railway use. The work is conceptionizes an adaption of these norm for the use in railsways. Whereby the requirements for the railway system are met. Beginning with theoretical analyses that examine existing railway infrastructure, assess its compatibility with modern digital charging protocols, and identify technical barriers or required adaptations. Railway-specific constraints and life-cycle expectations of up to 40 years will be considered. Further aspects include ensuring backward compatibility with conventional vehicles and evaluating emerging developments such as bidirectional charging and the evolution of Open Charge Point Protocol (OCPP) communication. The applicability of EN 50546 for three-phase power supply at 63/125 A and 600 A will also be explored.