A main scientific and technical challenge facing the implementation of new and sustainable energy sources is the development and improvement of materials and components. In order to provide commercial viability of these applications, an intensive research in material-hydrogen (H) interaction is required. This work provides an overview of recently developed in-situ and in-operando H-charging methods and their applicability to investigate mechanical properties, H-absorption characteristics and H embrittlement (HE) susceptibility of a wide range of materials employed in H-related technologies, such as subsea oil and gas applications, nuclear fusion and fuel cells.