The energy storage system, with a total nominal power of 40 MW and a storage capacity of 80 MWh, consists of 48 lithium-ion-based battery units and represents an important milestone on Hungary’s path toward decarbonization. Of this capacity, 60 MWh is subsidized under Hungary’s Recovery and Resilience Facility (RRF), co-financed by the European Union, as part of the “Installation of Network Energy Storage at Energy Market Operators" program. Under tender ID RRF-6.5.1-23-2024-00039, the 10 MW storage units—implemented with approximately HUF 1.350 billion in non-refundable grant—are expected to be commissioned starting in the summer of 2025.
Decarbonization is a key objective of the MET Group. The energy storage project currently under construction in Százhalombatta marks a significant domestic step in the green transition of the energy sector. Construction of the 80 MWh system began in November 2024 by MET Danube Energy Storage LLC on the grounds of the Dunamenti Power Station. A distinctive feature of the project is that it is being built as three separate units, each as an independent facility within the power station: one 20 MW unit and two 10 MW units.
The site is undergoing continuous transformation and is increasingly functioning as an energy industrial park, aligning with the sector’s carbon neutrality goals. Unlike previous Dunamenti’s projects, this one is being documented more thoroughly with video and photo coverage to give the public a step-by-step insight into the construction of one of Hungary’s largest energy storage facilities. The project progress is on track, and commissioning of the units is going to begin in the summer of 2025.
To present the project’s workflows and technical challenges, the organizers held a public day. The press-opened event, held on April 3, 2025, was attended by representatives of MET Danube Energy Storage LLC, the manufacturer of the energy storage units Huawei Technologies, and the project’s general contractor and builder Forest-Vill Kft. Although the construction is still ongoing, the companies involved jointly, showcased the already-installed storage units to members of the press and professional guests.
Thanks to the continuous renewal of the Dunamenti Power Station, the site has been responsive to change in recent years. In 2021, a program was launched, and as part of the current energy storage project, new equipment has been installed to leverage synergies and repurpose existing infrastructure.
“Decarbonization is the future. Our goal is to meet the growing flexibility needs of the electricity system through battery-based storage and discharge of electricity generated from renewable sources,” emphasized project engineer Benjámin Gáthy.
The energy storage system is a key milestone, with its primary objective being to ensure grid flexibility. “The project contributes to the security of electricity supply and to the better utilization of renewable energy sources,” added project engineer Ádám Hován.
MET Danube Energy Storage LLC's 60 MWh capacity is supported under Hungary’s Recovery and Resilience Facility (RRF), co-financed by the EU, in the “Installation of Network Energy Storage at Energy Market Operators" program. The 10 MW storage units implemented under tender ID RRF-6.5.1-23-2024-00039 and supported with HUF 1.350 billion in non-refundable funding are aligned with the European Union’s 2030 climate goals and Hungary’s national energy strategy.
More information about the project is available at: danubeenergystorage.met.com
