Data centres play a pivotal role in today's technology landscape, but their energy demands are substantial and growing. With global energy consumption projected to rise, the focus shifts to sustainable solutions. The EU is at the forefront of implementing regulations to enhance the energy efficiency of data centres. Initiatives like the Energy Efficiency Directive and Renewable Energy Directive impose obligations on data centre operators to reduce carbon footprint and transition to renewable energy sources. Corporate Power Purchase Agreements are becoming increasingly common for securing renewable energy supply. However, renewable energy sources can be intermittent, prompting exploration into hydrogen as an alternative energy storage solution. Green hydrogen offers promise as a clean energy source for data centres, potentially replacing traditional backup generators. Understanding and meeting regulatory requirements for utilizing hydrogen is crucial. The potential integration of hydrogen in data centres signifies a shift towards greener and more sustainable operational practices, aligning with global efforts for climate action and energy efficiency.