E.ON has completed the installation of a new battery energy storage system in Soroksar to enhance Hungary’s electricity network and allow for more household solar connections.
The project, valued at about 2 million euros, was funded partly through non-repayable support from the European Union’s Recovery and Resilience Facility (RRF) and partly from E.ON’s own resources. The facility offers 5.5 MWh of storage capacity and 2.5 MW of power output, housed in 16 outdoor cabinets. Each cabinet, weighing 3.6 tons, contains liquid-cooled lithium iron phosphate (LFP) batteries. The system also includes two 1.25 MW converters and a 3,150 kVA transformer. Fully automated and remotely operated within a smart grid framework, it requires no on-site personnel.
According to E.ON, the storage system can hold the daily output of around 350 household solar installations. It stores excess electricity when production surpasses demand and releases it during shortages, helping stabilize voltage and reduce outage risks. This capability also makes it possible to integrate more solar systems into the grid, supporting Hungary’s National Energy and Climate Plan goals.
With this addition, the Soroksar substation now has a combined storage and power capacity of 12.5 MW and 11.5 MWh, including Hungary’s first large-scale battery storage facility, which was commissioned at the site in 2018.
