One of Hungary’s largest battery energy storage facilities has been completed in Szolnok. Built by Forest-Vill on behalf of MAVIR, the system officially began operations on June 26. The HUF 8.5 billion investment aims to support the grid integration of solar power plants established in the region.
One of the largest electricity storage systems in Hungary has been inaugurated in Szolnok. Forest-Vill was responsible for the full design and implementation after winning MAVIR’s public procurement tender at the end of 2023. The system has a power output of 20 MW and an energy storage capacity of 60 MWh, started operating after 26 June, and it is directly connected to MAVIR’s substation in Szolnok. The HUF 8.5 billion project is help integrate the region’s solar power plants into the grid, thereby enhancing supply security.
The project’s significance lies in its scale: it is currently Hungary’s second-largest grid-connected battery energy storage facility, capable of contributing to domestic sustainable energy production at an unprecedented level. The high-reliability and safety storage units were supplied by Huawei.
“The implementation of the Szolnok energy storage facility is a milestone not only for us, but also for the entire Hungarian energy sector. With the increasing expansion of solar power capacities – 1,600 MW in 2023 and 1,500 MW last year – finding energy storage solutions has become essential. We are proud to have realized such a large-scale, strategically important project. Our goal is to contribute to the expansion of Hungary’s energy storage capacity in the coming years through additional large-scale investments,” said Csaba Németh, CEO of Forest-Vill.
Forest-Vill, headquartered in Budaörs, is a specialized electrical engineering company actively involved not only in optimizing domestic power networks, but also in delivering energy storage projects, from planning to execution. The Szolnok investment is expected to significantly contribute to the sustainable growth of Hungary’s renewable energy portfolio.
Although the Szolnok energy storage system was considered the largest of its kind in the country at the time the project began, it has since been surpassed. Forest-Vill also carried out the construction of MET Danube Energy Storage’s energy storage system in Százhalombatta, with a nominal output of 40 MW and storage capacity of 80 MWh. This facility was also connected to the national grid in June 2025, breaking the previous record held by the Szolnok unit.
