DTEK and Fluence Start Commissioning 200MW/400MWh Ukraine Portfolio

Image: DTEK

DTEK, Ukraine's largest private energy company, and Fluence Energy have announced the early start of commissioning for Ukraine's largest battery energy storage project and one of the biggest in Eastern Europe.

The deployment of 200 MW of connected power across six locations is now entering the final phase of delivery, which includes commissioning, testing and first discharge of the batteries.

Six hundred and ninety eight Fluence Gridstack cubes with the batteries have been installed at six energy storage sites – each one with a capacity of between 20 MW and 50 MW. Collectively, they are able to store 400 MWh of electricity – enough to power 600,000 Ukrainian homes for two hours.

Under the contract with grid operator Ukrenergo, commercial operations are set to begin in October 2025 – in time for the start of Ukraine’s crucial winter heating season.

Once fully operational, the systems will provide frequency and power reserve as well as balancing services to reinforce Ukraine's grid. This is especially critical during outages and to reduce the necessity of implementing rolling power outages that affect the population and economy.