As energy systems continue to evolve, ensuring compliance with grid code standards is crucial for maintaining system stability and interoperability. This presentation explores the certification process of grid code requirements using Hardware-in-the-Loop (HIL) testing methodologies. We begin by defining HIL and its role in simulating real-world conditions for electrical components and systems. Recent updates to grid code standards, such as EN 50549-10, are discussed, focusing on their guidance for using HIL in conformity evaluation. The presentation outlines a proposed certification process that incorporates HIL, discussing its potential benefits in terms of efficiency and effectiveness for certifying product platforms. Attendees will gain an understanding of how HIL can be applied in certification processes to support compliance with modern grid requirements.