News Release

Orders of 14.9MWh Lithium-ion Storage Battery System, For energy storage stations that received subsidies by the Tokyo Metropolitan Government

March 18, 2024
GS Yuasa Corporation

GS Yuasa Corporation (Tokyo Stock Exchange: 6674) has received orders for a lithium-ion battery storage systems with a storage capacity of 14.9MWh ("the facility") from a joint venture company jointly established by sub-subsidiary of Mizuho Leasing Company and Tohoku Electric Power Co.,Inc.. The facility will be delivered to energy storage facilities to be constructed in Kumagaya City, Saitama Prefecture and Isesaki City, Gunma Prefecture with subsidies from the Tokyo Metropolitan Government.
The introduction of renewable energy has been increasing in recent years. However, there are some issues, such as instability in the power supply and demand balance in the power system because the amount of electricity generated varies depending on the weather and the time, and the need to control the power generation output when the demand for electricity is low. These storage systems contribute to the maximum utilization of renewable energy by adjusting the power supply balance and stabilizing the power system by recharging and discharging power to the grid to which they are connected.

These storage systems are equipped with the “LEPS-2-14” lithium-ion battery for industrial use which is manufactured by GS Yuasa. The receipt of this order was secured as a result of a favorable evaluation of the quality, safety measures, and prompt after-sales service system of GS Yuasa products.

GS Yuasa will continue contributing to the field of power supply stabilization through expanding sales of its lithium-ion battery power storage systems. By helping to facilitate power grid adjustment capabilities, GS Yuasa is also contributing to further expansion of renewable energy use in support of Japan’s commitment to achieving carbon neutrality by 2050.

※ Tokyo Metropolitan Government Website :

Features of lithium-ion battery storage system

1. High level of safety ensured as voltage of all cells can be monitored and temperatures of all modules can be controlled
2. As the modules are fan-less, malfunctions are less likely to occur and the number of parts requiring replacement has been substantially reduced
3. Modules housed in fire prevention ordinance compliant cubicles in accordance with relevant laws and regulations
4. Able to withstand severely cold climatic conditions

GS Yuasa's services

Constant voltage monitoring and failure monitoring are performed on all of the cells to ensure the reliability of the entire system. In the event of a malfunction, GS Yuasa utilizes its nationwide service network (one of Japan’s largest) to promptly respond to customer needs.

Overview of the Lithium-ion storage battery facility

Delivery destination Yatogo Energy Storage Station Niraduka Energy Storage Station
Location Kumagaya City, Saitama Pref. Isesaki City, Gunma Pref.
Scheduled date of operation February, 2025 June, 2025
Battery type LEPS-2-14 lithium-ion batteries
Output 1.96 1.96
Capacity 7.46 7.46
Dimensions Housed in W2,350mm×L9,400mm×H2,800mm containers
Number of containers 4 4

Conceptional image of lithium-ion storage battery installation

Yatogo Energy Storage Station

Yatogo Energy Storage Station

Niraduka Energy Storage Station

Niraduka Energy Storage Station

*The copyright of the image belongs to a joint venture company jointly established by sub-subsidiary of Mizuho Leasing Company and Tohoku Electric Power Co.,Inc..

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