At the global level, electricity storage is likely to develop in a context of rapid growth in variable renewable energy (VRE) sources. However, simulations have shown that stationary storage needs will remain limited in the French context due to the flexibility of our electricity system and its interconnections with the European system. Significant storage requirements – especially inter-seasonal needs – are only likely to emerge after 2035, if an electricity mix consisting almost entirely of renewable means of production is established. Electricity storage is also a key issue in the rapid development of forms of sustainable mobility, at present for electric mobility, and in the longer term for mass hydrogen-powered mobility.