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Question 7 of 21

Flywheels aren’t new. Why haven’t they gone mainstream?

Flywheels already run on the grid for seconds to minutes of power. Qnetic is building one that stores energy for hours.

Michael Pratt, CEO · Pulsar demo, 23 Sep

The full answer

The physics is well proven, and flywheels already run on the grid today, but mostly for seconds to minutes of power. Qnetic's work is a flywheel that stores energy for hours at grid scale. That takes a light, very fast rotor, magnetic bearings controlled to fractions of a millimeter, and a vacuum. The difficulty is in that engineering, and the Vega and Pulsar prototypes are proving it one step at a time.

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