Hungary ACEMIL-Zrt vanadium liquid flow battery energy storage system project For user-side energy storage demonstration project, the energy storage system uses the trough period and discharges during the peak period, and obtains benefits through the time-sharing electricity. Hungary ACEMIL-Zrt vanadium liquid flow battery energy storage system project For user-side energy storage demonstration project, the energy storage system uses the trough period and discharges during the peak period, and obtains benefits through the time-sharing electricity. Invinity Energy Systems plc (“Invinity”), a global manufacturer of utility-grade long-duration energy storage, today announces two new sales agreements in Hungary totalling 20 MWh, alongside a trading update for the year ended 31 December 2025. Two new sales agreements totalling 20 MWh with Central. STS Group, a leading Hungarian renewable energy project developer, has purchased a 1. 5 MWh vanadium flow battery for use in a solar plus storage project near the municipality of Öskü, central Hungary. Find out more in the case study below. Hungary was among the first countries globally to turn its 2050 emissions target. Invinity Energy Systems hits £17m 2025 revenue and secures 20 MWh in new Hungarian sales, showcasing vanadium flow battery progress and a growing order book. The energy storage system will be installed alongside a large-scale solar PV.