Greenergy-Solar Duna Ltd. has completed its electricity storage construction project, which involved a HUF 1.8 billion investment to install four storage units, each with a capacity of 1,245 megawatts, at the company’s solar park near Paks, Central Hungary, MTI reports.
At a project-closing press conference held on-site, Levente Tasnádi-Tulogdi, the company’s managing director, stated that the investment was supported by HUF 672 million from the European Union’s Recovery and Resilience Facility.
The company executive explained that the four storage units operate using lithium iron phosphate technology and were manufactured by the Chinese company BYD. Converters and a step-up transformer were installed for the storage units. Operational testing is still underway at the facility, and it will begin commercial operation next week.
Each storage unit has a nominal capacity of 2.8 megawatt-hours, which means it can store enough energy to meet the annual energy consumption of an average household.
The managing director said that the storage facility complements the company’s solar power plant well, making it possible to align the output of power plants using weather-dependent renewable energy sources with consumer demand. The facility can participate in the system-level services market, which is operated by the Hungarian Electricity Transmission System Operator (MAVIR) Ltd. and determines whether power plants should generate more or less to maintain balance.
He also noted that the project’s payback period is close to ten years.
According to information provided by the company at the time, Greenergy-Solar Duna’s 20-hectare solar park, which was commissioned in 2022, features 21,000 photovoltaic modules and 44 inverters, and the power plant generates enough electricity to meet the average consumption of 5,500 households.
In 2025, the company achieved net revenue of HUF 714 million, derived from the sale of the 16 gigawatt-hours of electricity generated annually by the solar power plant — partly through direct sales to large consumers. According to Levente Tasnádi-Tulogdi, the operation of the energy storage facility increases revenue by HUF 200–300 million annually.
The company is wholly owned by Greenergy Holding Plc., which owns more than 36 megawatts of solar power capacity. In 2025, the company achieved net revenue of 23.389 billion forints, with a net profit of HUF 2.7 billion. The company’s CEO said they do not expect any significant changes in this regard.
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