NGK Insulators, Ltd., founded in 1919, is a Japan-based company mainly engaged in the provision of ceramic products. NGK was the first in the world to commercialize a NAS® battery system which is characterised by large capacity, high energy density and long life. By storing fluctuating renewable energy such as wind and solar during off-peak times, NAS® batteries safely and efficiently supply reliable power during peak demands. With a capacity of six hours, NAS® batteries are the green alternative to fossil fuel peak plants. NAS® batteries can additionally provide any type of application depending on your needs, like deferral of grid and generation investments, provide on-peak / off-peak price arbitrage, frequency regulation, ramping services, voltage control and other grid functions.