Image: MET Group

Swiss-based energy company MET Group has officially commissioned Hungary’s largest standalone battery energy storage system (BESS) at its Dunamenti Power Station in Százhalombatta, just south of Budapest. The new facility features a total output of 40 MW and a storage capacity of 80 MWh, marking a major milestone in Hungary’s energy transition.

This large-scale project significantly enhances MET Group’s energy storage portfolio in the country. It follows the installation of a 4 MW / 8 MWh demonstrator BESS—powered by Tesla Megapack 2 batteries—commissioned at the same site in 2022.

Originally a coal and gas power station, the Dunamenti site has seen a progressive shift toward cleaner technologies since MET Group acquired a 75% majority stake from GDF Suez in 2014. The latest development underscores the group’s commitment to modernizing its energy infrastructure through solar PV and battery storage solutions.

The technology for the new facility was supplied by Huawei Technologies, with Forest-Vill Ltd., a Hungarian engineering firm, serving as the main contractor.

According to MET Group, the combined capacity of the two BESS units is now sufficient to power all of Budapest’s decorative and public lighting for four continuous hours, highlighting the strategic role of battery storage in urban resilience and grid flexibility.

Péter Kaderják, president of the Hungarian Battery Association, welcomed the launch, emphasizing the growing need for energy storage to complement renewables:

“We must strive by all possible means to exploit Hungary’s renewable energy sources as extensively as possible, using well-established, cost-effective technologies.”

This project positions MET Group at the forefront of Hungary’s clean energy transformation and strengthens the country’s grid infrastructure amid rising renewable penetration.