The U.S. International Development Finance Corporation (DFC) has approved financing for a 200 MW/400 MWh battery energy storage system (BESS) portfolio developed by DTEK across six sites in Ukraine. The decision was announced on September 16, 2026, as part of more than $8 billion in new DFC investments globally.
The storage portfolio is located across the Kyiv and Dnipropetrovsk regions and consists of six battery systems ranging from 20 MW to 50 MW each. The facilities collectively provide 400 MWh of storage and are designed to support frequency regulation, balance fluctuations in electricity supply and improve the stability of Ukraine’s power grid.
DTEK developed the project with U.S.-based energy storage company Fluence, which supplied its Gridstack technology. The systems provide rapid grid response and include grid-forming capabilities designed to support network stability. The portfolio can deliver enough stored electricity to supply the equivalent of about 600,000 Ukrainian homes for two hours.
The project was completed in approximately six months between March and August 2025, considerably faster than the typical 18 to 24 months cited by DTEK for projects of comparable complexity. Fluence also completed commissioning remotely after training 20 Ukrainian power engineers at its projects in Germany and Finland, allowing local teams to undertake installation and commissioning work.
The BESS portfolio entered commercial operation after securing a contract with Ukraine’s transmission system operator Ukrenergo, with operations planned from October 2025. Its distributed configuration across multiple locations is intended to provide additional flexibility and reduce dependence on individual generation assets during periods of grid disruption.
DTEK describes the project as a €125 million investment and says the DFC financing represents its largest debt transaction for Ukraine’s energy sector since Russia’s full-scale invasion in 2022. The DFC said its financing will strengthen energy security through American technology while supporting greater resilience in Ukraine’s electricity infrastructure.
The financing also highlights the growing role of battery storage in Ukraine’s power-sector recovery. Beyond providing stored electricity, the six-site portfolio can respond rapidly to changes in grid conditions, helping manage frequency and power imbalances. The project adds to a broader expansion of energy storage in Ukraine as the country seeks more flexible and resilient electricity infrastructure.