1) High energy storage density; Higher than superconducting magnetic energy storage, supercapacitor energy storage, and general batteries.

2) Short charging and discharging time, without overcharging and discharging problems, and long service life; Charging the flywheel for energy storage only takes a few minutes,

Unlike chemical batteries, which require several hours of charging time. The lifespan of a flywheel energy storage system depends heavily on the lifespan of its power electronics, typically reaching around 20 years.

The important bottlenecks in the widespread application of flywheel energy storage technology include:

a) The technical cost is relatively high compared to batteries;

b) Further breakthroughs are needed in bearing materials;

c) The phenomenon of self discharge is very serious.