Why hydrogen?

Storing solar energy in the form of hydrogen

Storing solar energy in the form of hydrogen is a technique that transforms the electricity produced by solar panels into hydrogen, via a process of electrolysis. This method uses electricity to separate water molecules into hydrogen and oxygen. The hydrogen produced is a clean fuel that can be stored and used later to generate electricity, heat or even power hydrogen-powered vehicles. Unlike batteries, which have limited storage capacity, hydrogen can be stored for long periods, enabling solar energy to be harnessed even when there is no sun.

This solution is particularly useful for meeting the storage challenges associated with renewable energies, as it offers a sustainable and flexible energy reserve. During periods of low solar production, such as at night or in the winter months, the stored hydrogen can be converted back into electricity using a fuel cell, providing a stable source of energy. Hydrogen storage therefore promotes energy autonomy and contributes to the transition to a CO₂ emission-free energy system, playing a key role in balancing the electricity grid and developing sustainable mobility.