Not only is it a viable energy storage method, it's already used commercially (predominantly in power conditioning systems). See also: https://en.wikipedia.org

Not only is it a viable energy storage method, it's already used commercially (predominantly in power conditioning systems). See also: https://en.wikipedia.org/wiki/Superconducting_magnetic_energy_storage https://en.wikipedia.org/wiki/Superconducting_magnetic_energ...