NGK Analyzer NAS Battery

NGK’s NAS batteries are large-capacity batteries with many power grid applications. Superior function and performance possible only from decades of research, design, testing, demonstration, advanced manufacturing and over 15 years of proven commercial operation.


The world’s first large-capacity battery energy storage system and a major leap forward in the ability to provide a stable supply of renewable energy. A product of NGK’s proprietary advanced ceramic technologies, the NAS battery was the world’s first commercialized battery system capable of megawatt-level electric power storage. The NAS battery system boasts an array of superior features, including large capacity, high energy density, and long service life, thus enabling a high output of electric power for long periods of time.


  • Long Duration
  • 24/7 Power Supply
  • Fast Response
  • Compact
  • High Reliability
  • Safety
  • Develops for Grids
  • System Expansion
  • Minimal Maintenance
  • Wide Ambient Operating Range
  • Long Lifetime
  • Plug & Play


During discharge

  • Molten sodium donates electrons to the external circuit at the anode
  • The resulting ions Na+ migrate to the cathode through the beta-alumina solid electrolyte that separates the two liquid electrodes and that acts as a superionic conductors
  • The volume of liquid at the anode therefore decreases
  • Arriving at the cathode, Na+ ions combines with molten sulfur which reacts with the electrons coming from the external circuit, forming sodium polysulfide Na2Sx
  • The volume of liquid at the cathode therefore increases
    2 Na + x S → Na2Sx with 3.3 ≤ x ≤ 5

During charge

  • The reverse process takes place


Voltage 2V
Energy density 367 Wh/l
222 Wh/kg
Power density 36 W/kg
C-rate 1 / 6 = 0.17
Optimal temperature range 300 – 340°C
Maximal temperature range 290 – 360°C
Life time 4500 cycles
15 years

Additional Information

Major Advantages

  • Long duration
  • Long life expectancy
  • Tolerance for cold and high temperature environment

Couldn’t find what you were looking for?

Contact us with your specification for assessment and availability of other products configurations.

Click Here