MET Group has inaugurated Hungary’s largest standalone battery energy storage system (BESS) at the Dunamenti Power Station in Százhalombatta, further advancing efforts to enhance grid flexibility and support renewable energy integration.
The 40-megawatt (MW) / 80 megawatt-hour (MWh) system operates on a two-hour charge-discharge cycle and marks a significant scale-up from the company’s earlier 4MW/8MWh pilot project at the same location, commissioned in 2022. While the initial system was built using Tesla Megapack 2 batteries, the new installation features technology supplied by Huawei Technologies, with Forest-Vill Ltd acting as the main contractor.
“The application of battery energy storage systems is a key element on the road to energy transition, as they allow to increase the penetration of new renewable sources into the power grid,” said Péter Horváth, chief executive of Dunamenti Power Station.
According to MET, the combined capacity at the Százhalombatta site is sufficient to meet Budapest’s decorative and public lighting needs for four hours.
Hungarian Battery Association president Péter Kaderják welcomed the development, stating: “We must strive by all possible means to exploit Hungary’s renewable energy sources as extensively as possible, using well-established, cost-effective technologies.”
The new facility forms part of MET Group’s broader strategy to expand its European battery storage footprint. In 2024, the Swiss-headquartered energy company acquired French battery developer Comax and is now pursuing co-located storage projects alongside solar parks in multiple countries.
MET Group reported €17.9 billion in sales revenue in 2024, trading 140 billion cubic metres of gas and 76 terawatt-hours (TWh) of electricity.
