Ukraine’s energy sector has rapidly transformed as the war revealed structural weaknesses and prompted urgent regulatory reforms. The regulator, together with the Ministry, introduced a modern regulatory framework for energy storage, recognising flexibility as a vital component of system security rather than a long-term goal. The Energy Storage Facilities Law and subsequent NEURC regulations formalised storage as an independent market participant with full access to wholesale markets, offering investors much-needed legal certainty during a time of significant system stress.