Chinese battery manufacturer Hithium has entered into a strategic cooperation framework agreement with international renewable energy provider KNESS Group to develop long-duration energy storage projects in Ukraine.
The agreement, signed in Warsaw, outlines plans to deploy a total of 2 GWh of battery energy storage systems over the next two years, with approximately 400 MWh slated for initial delivery in the first quarter of 2026.
The project will feature multiple containerized battery energy storage systems (BESS), including 6.25 MWh and 5 MWh units, designed to support higher levels of renewable generation and enhance grid resilience. Sam Wang, Sales Director at Hithium, noted that such infrastructure is becoming essential for countries like Ukraine as they integrate growing shares of wind and solar power into their electric grids.
Hithium has already demonstrated its long-duration storage capabilities through a separate 2 GWh supply agreement signed in September 2025 with Bulgarian EPC Solarpro Holding. That deal covers utility-scale installations across Eastern Europe, including Bulgaria, Hungary, Romania and North Macedonia. Under both agreements, Hithium will deliver its ∞Power DC block solutions, which incorporate high-capacity 1175 Ah and 587 Ah lithium-ion cells.
In 2024, Hithium completed one of Bulgaria’s largest BESS installations at the time—a 25 MW/55 MWh system for Austria’s Renalfa IPP—underscoring its experience in large-scale projects. The company recently released results from an independent open-door fire safety test, conducted by UL Solutions, on its 6.25 MWh ∞Power system. The test simulated a thermal runaway event under maximum oxygen conditions. According to Hithium, fire-resistant module covers, reinforced steel enclosures and multi-layer insulated containers successfully contained any fire to a single unit, with no thermal propagation to adjacent systems and temperatures remaining within safe limits.
According to data from Taiwanese research firm InfoLink, Hithium was the second-largest battery cell supplier worldwide in 2025, trailing only one competitor. The company is frequently ranked among the top three DC-side BESS vendors, reflecting its growing presence in the global energy storage market.
Source: ESS News
