FES systems have relatively long lifetimes (lasting decades with little or no maintenance; full-cycle lifetimes quoted for flywheels range from in excess of 10⁵, up to 10⁷, cycles of use), high specific energy (100-130 W·h/kg, or 360-500 kJ/kg) and power density.

Solid mass gravitational

Changing the altitude of solid masses can store or release energy via an elevating system driven by an electric motor/generator. Studies

1.Previous
3.Next