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Energy storage technology by efficiency 2015

Energy storage technologies based on efficiency in 2015

The data shows the efficiency of several energy storage technologies in 2015. During this year, flywheels had a maximum efficiency of 95%. Flywheels are a mechanical method of energy storage.

Super capacitor 80 98
SMES 80 95
PHS 70 85
CAES 40 75
Flywheels 70 95
NaS battery 70 90
Li-ion battery 85 98
Flow battery 60 85
Hydrogen 25 45
SNG 25 50