Green hydrogen is emerging as a versatile chemical and energy carrier in a context promoting decarbonisation and transition to renewable energy sources. Power-to-H2 systems can be successfully integrated with renewable energy systems by using excess electricity for H_2 production. Solid Oxide Electrolyzers Cells (SOECs) are one of the most attractive options due to their high electrical conversion efficiency and potential for CO_2 co-electrolysis. This advantage is related to their elevated operating temperatures, ranging from 600 to 900 °C, which allow a significant increase in the transport processes involved in the stack operation. Nevertheless, high temperatures have a strong impact on system’s durability due to thermal degradation issues.