This presentation examines the practical applications of high-voltage DC (HVDC) coupling between two independent HV systems to enhance the functionality and range of electric mobile machines. It outlines the mechanical, electrical and system-level challenges that arise when interconnecting previously isolated HVDC systems and highlights the essential system functions required to ensure safe coupling, protection and controlled operation. A practical implementation of a safe, connectable HVDC link is presented, based on the AEF ISO 23316 2 high-power interface. Finally, a 4×4 battery electric AgroTruck is showcased, demonstrating HVDC coupling with external swappable batteries for scalable range extension.

• Practical use cases of HVDC coupling from extending machine functionality to improving the machine range
• Technical issues when linking inependent HVDC systems, including mechanical, electrical and system‑level challenges
• Required system features and functions for safe coupling and operation of connectable HVDC links
• Practical implementation example or a HVDC coupling system using the AEF ISO 23316‑2 agricultural electric high-power interface
• Case study: Extending the range of an electric 4×4 AgroTruck using HVDC coupling and external swappable HV batteries