DTEK Group, Ukraine’s leading energy company, in collaboration with Fluence, a global leader in energy storage solutions, has started the commissioning of a significant battery energy storage (BESS) project. This is the largest BESS project in Ukraine.
698 Fluence Gridstack cubes with batteries have been installed at six energy storage sites. Each cube has a capacity of between 20MW and 50MW. Collectively, they are able to store 400MWh, which is enough energy to power 600,000 homes for two hours. This system is designed to improve grid stability and support the integration of renewable energy sources in Ukraine.
Battery energy storage systems are becoming increasingly essential. They allow for better management of energy supply and demand, can stabilize the grid, and facilitate the integration of renewable energy sources like wind and solar. This is particularly important as countries worldwide move towards achieving their renewable energy targets.
DTEK’s venture into energy storage represents a strategic shift in its approach to energy management. By incorporating advanced storage solutions, the company aims to enhance its operational efficiency and reliability.
Fluence, with its extensive experience in energy storage, is providing the necessary technology and expertise for the project. The partnership leverages Fluence’s cutting-edge capabilities and DTEK’s local market knowledge to create a robust energy storage solution.
This project is part of DTEK’s broader strategy to modernize Ukraine’s energy sector. By investing in innovative solutions, DTEK aims to lead the transition to a more sustainable energy system, reducing dependence on fossil fuels while enhancing energy security.
Energy experts underscore the importance of such projects, noting their role in reducing carbon emissions and supporting the shift to renewable energy sources. As more countries and companies commit to climate goals, the demand for efficient energy storage solutions will continue to rise.
The project has entered the final phase of delivery, which includes commissioning. The project is being commissioned fully remotely due to the challenges of war and restricted access in Ukraine. Commercial operations are set to begin in October 2025.
“The remote commissioning approach we have introduced ensures continuity and operational efficiency amid travel restrictions and will also enable faster scaling of any future deployments.”
Julian Nebreda, CEO, Fluence
The successful commissioning of this project could serve as a model for future initiatives, illustrating the potential benefits of integrating battery storage solutions within existing energy grids. Through partnerships like that of DTEK and Fluence, the energy sector can achieve significant advancements in sustainability and efficiency.
Source: DTEK and Fluence battery project goes into commissioning
Photo Credit: DTEK


