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June 22, 2015
NGK INSULATORS, LTD.

NGK Receives Order for World's Largest Battery Using Containerized Large-Capacity
NAS Batteries for Kyushu Electric Power Co, Japan

NGK INSULATORS, LTD. (President Taku Oshima; Headquarters: Nagoya, Japan) announced today that it has received an order from Mitsubishi Electric Corporation to install a large NAS battery energy storage system at Buzen Power Station of Kyushu Electric Power Co., Inc.

The order is for NAS containerized batteries with a total output of 50,000 kW and a storage capacity of 300,000 kWh (enough to supply electricity to approximately 30,000 households). The completed system is expected to be the largest storage battery facility in the world and is scheduled to begin operation by March 31, 2016. Kyushu Electric will connect the NAS battery system to its power grid to improve the electricity supply-demand balance, control the grid voltage and smooth the delivery of renewable energy to its power grid. The system will be capable of storing electricity equivalent to a pumped hydroelectric power generation facility.

Kyushu Electric won a grant in a public bid initiated by the New Energy Promotion Council to launch a Demonstration Project for Improving the Balance of Power Supply and Demand with a LargeCapacity Storage Battery System.

Each NAS battery container houses NAS batteries and control devices with a total output of 200 kW and storage capacity of 1200 kWh in a transportable 20 ft container. The containers substantially reduce the lead time and cost of installing NAS battery systems and enable installations with appropriate capability for each application, worldwide.

NAS batteries are proven large-capacity storage batteries first commercialized by NGK in 2002. They are characterized by high energy density, and longevity, and are capable of delivering a stable supply of high-output electricity for many hours at a time over a long service life. Since 2002, NGK has delivered NAS battery systems with a total output of more than 450,000 kW and storage capacity of 3,000,000 kWh at 190 locations worldwide. The systems are being used for load leveling and emergency power supplies, as well as to stabilize and smooth the power output of renewable energy sources. NGK continues to support the growth of renewable energy by supplying large-capacity NAS battery systems.


Overview of the NAS Battery System Order

Power output: 50,000kW
Storage capacity: 300,000kWh
Installation site: Buzen Power Station of Kyushu Electric Power Co., Inc. (Buzen City, Fukuoka Prefecture)
Operation start: Before March 31, 2016 (planned)

Diagram of the installation of NAS battery containers

Diagram of the installation of NAS battery containers


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