September 15, 2025: Ukrainian private energy sector investor DTEK and Fluence have energized a 200 MW BESS in Ukraine.

DTEK said on September 11 the €125 million ($147million) investment showed capital can still flow into Ukraine’s energy sector when there is a clear need, with the right partnership and the right technology.

The BESS uses Fluence’s proprietary Gridstack lithium iron phosphate utility-scale tech. A total of nearly 670 Gridstack cubes with batteries have been installed at six sites, each one with a capacity of between 20-50MW.

DTEK said the project is the largest of its kind in Ukraine and eastern Europe, with the ability to power 600,000 Ukrainian homes for two hours.

Despite Russia’s invasion and war with Ukraine, the BESS was built in six months, which DTEK said is significantly faster than the industry average and comes online just before the winter season.

The facility is the first major energy project to be delivered since the signing of the US-Ukraine Economic Partnership Agreement earlier this year.

Fluence has said previously it will continue to support commissioning and operations of the project remotely through diagnostics, testing and performance monitoring to ensure safe and efficient deployment in wartime conditions.

DTEK shareholder Rinat Akhmetov said: “Despite the war, we invest in Ukraine’s recovery and growth. Our energy sector, having withstood countless Russian attacks, now gains new momentum.”