Product
NAS Battery Handover Ceremony Held at Hungarian State-Owned Energy Company MVM
Attended by the State Secretary of the Ministry for Energy of Hungary and the CEO of the state-owned energy company MVM
June 23, 2025
NGK INSULATORS, LTD. (hereinafter, “NGK”) announces that a handover ceremony was held following the completion of installation and test operation of a NAS batteries for storing electric energy ordered by MVM Balance Zrt., a subsidiary of the Hungarian state-owned energy company MVM Group, through Duna Center Therm Uzemi Szolgaltato Kft., a Hungarian engineering company.
The NAS batteries have been installed inside the power station of MVM Balance for use in a grid storage battery demonstration project for stabilizing the electricity grid. The project will verify the use of grid storage batteries for storing energy during times of surplus and discharging it when there is a shortage, to boost the earliest social implementation. It will also examine the provision of adjustment capacity to the ancillary service market, which trades energy supply (adjustment capacity) to eliminate gaps in supply and demand of electric energy. The MVM Group has adopted a policy of full-scale advancement of storage battery installation as a measure for adjusting renewable energy supply and demand. With this demonstration project, the MVM Group plans to examine the performance standard for grid storage batteries to be introduced in the future.
At the conclusion of the installation and test operation work, a handover ceremony was held at the power station of MVM Balance in Liter on June 10. Government officials and personnel responsible for the MVM Group were in attendance, and the State Secretary of the Ministry for Energy of Hungary gave a speech, in which he noted that the introduction of batteries to the power station would enable rapid and flexible response to electric power demand and contribute to increasing energy stability and security.
Comment from Mr.Attila Steiner, State Secretary
The Ministry of Energy aims to secure 1 gigawatt of electric energy storage capacity within Hungary by 2030. This demonstration project is a further step toward achieving this goal. At the same time, it will contribute to energy autonomy, sustainability, and technology reform. Stable energy supplies are essential to the building of resilient communities. This demonstration project is the key to obtaining electric power that local firms and citizens can rely on.
Comment from Hiroyuki Shinohara, Senior Vice President, Group Executive, Energy & Industry Business Group, NGK INSULATORS, LTD.
I am very honored to have been able to participate in this demonstration project. NAS batteries are a high-capacity storage battery that contributes to stable supplies of renewable energy with their ability to discharge electric power over a long period. Made by using the abundant resources of sodium (Na) and sulfur (S), they also have an inherent resilience to geopolitical risk. This demonstration project has demonstrated their effective role in resolving energy issues in Hungary. I look forward to seeing their beneficial impacts on the grid and on local communities.
Hungary, which has legislated the achievement of carbon neutrality by 2050, has established a goal of converting 90% of its generated power to low-carbon sources by 2030, and is rapidly introducing renewable energy. Installed capacity of solar power generation equipment has reached approximately 8 gigawatts, accounting for over 25% of Hungary’s domestic electricity supply. Electric power demand and supply adjustment is essential for the stable use of renewable energy, and an urgent priority issue in terms of energy stability and security. Moreover, since the terrain in Hungary is mostly flat, it is difficult to construct pumped storage hydroelectricity* stations, which require a difference in elevation, so demand for high-capacity storage batteries such as NAS batteries is increasing as an alternative, and their adoption is expected to expand.
NAS batteries are used in various applications including stabilization of renewable energy, electric power demand and supply balancing, and emergency power sources. They have so far been installed in over 300 locations around the world and have a stable operational track record of more than 20 years. NGK will continue to further promote marketing and sales activities for NAS batteries and contribute to the expansion of renewable energy introduction and realization of carbon neutrality globally.
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*Pumped storage hydroelectricity
A facility that acts like a storage battery which uses water to store electricity. A regulating reservoir is created which stores water in the top and bottom areas of the power station. During times of high-power demand, water flows from the top to the bottom to generate electricity, and during times of low power demand, surplus power is used to pump water from the bottom to the top to be used for generating power again.
Overview of the Ordered NAS Battery
| Installation site | MVM Balance power station (Litér, Veszprém County) |
|---|---|
| Output | 750 kilowatt DC (maximum output) |
| Capacity | 4,350 kilowatt-hours DC (at the time of delivery) |
| Units installed | 3 container-type NAS batteries |
| Applications | Demonstration projects for electric energy supply for adjustment of electrical energy demand and supply, and demand and supply adjustment market |
Overview of the handover ceremony
| Date | 10:00~12:50, June 10 (local time) |
|---|---|
| location | MVM Balance Litér thermal power station |
| Attendees | Mr. Attila Steiner, State Secretary of the Ministry for Energy of Hungary Mr. Károly Mátrai, CEO of MVM Group Mr. Sándor Csorba, CEO of MVM Balance Zrt. Hiroyuki Shinohara, Senior Vice President, Group Executive, Energy & Industry Business Group, NGK INSULATORS, LTD., and others |
About NAS batteries
NAS batteries are a megawatt class large-capacity storage battery, implemented practically for the first time in the world by NGK. The batteries feature large capacity, high energy density (compact), and long life, and can provide a stable supply of electric power with a high output over long periods of time. They have been installed at over 300 locations worldwide, with a total output of over 740,000 kW (740 MW) and total capacity of approx. 5.0 million kWh (5,000 MWh) installed. NAS batteries were originally developed as the alternative technology to the pumped hydroelectric storage in urban areas. Nowadays they are used for various applications, including peak cutting through load balancing and emergency power supply, as well as stabilization of renewable energy and construction of smart grids, thereby contributing to reduced environmental load and realization of carbon neutrality. NAS batteries have obtained the certification based on stationary storage battery safety standard UL 1973 (cell and module level) and a test report based on UL 9540A standard*, which is to verify batteries and storage battery systems fire risk, for confirming compliance with its evaluation criteria (cell, module, and installation level) through the evaluation program of UL Solutions, a global independent safety science company.
About NAS Batteries
- *NAS batteries container type (including the single batteries and modules on mounted) are covered.
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*NAS and the NAS logo are trademarks of NGK INSULATORS, LTD., registered in the U.S. and other countries.