Superconducting magnetic energy storage. For example, an ordinary kitchen magnet has a magnetic field strength of less than 0.05 Tesla. American Superconductor has produced magnet coils surpassing 2 Tesla, the threshold rating for commercial HTS motors and generators. A device that converts power from one voltage and current level to another. Transmitting energy at higher voltages is more efficient, but consumers need low voltage power.
Electricity experiences several voltage changes enroute to an end-user.