This is a design for a Superconducting Solar Power Cable. It can generate and transfer energy super-efficiently. If it is shaped into a continuous loop it would act as a great energy storage solution, storing energy from the electrons indefinitely with zero resistance.

A liquid coolant travels through the inner tube so that it can keep the superconductor below its critical temperature. Liquid Helium is the ideal coolant because it is a Superfluid, however the coolant may be one of several different liquids depending on the exact implementation of the device. One option is to use Liquid Hydrogen, a liquid fuel, so that the cable can transfer electrical energy and fuel simultaneously.

A vacuum is used to thermally isolate the superconductor and coolant from the external environment. The better the vacuum, the better the insulation, the better this device will function. Attaching full time vacuum pumps might be necessary to maximise energy efficiency. Alternatively, if the device is implemented on a satellite in outer space, the vacuum of space can be used rather than vacuum pumps.

Magnets are used to maintain a space between the outer layers and the inner layers. This is to ensure that there is no path for heat to travel from the external environment to the superconducting layer or the coolant. The magnets should also counter the force of gravity and any small normal forces on the cable so that no direct contact can be made to the inner layers of the cable. It may also be possible to use the Meissner effect to achieve the required levitation of the core.

The Outer Shield could be made out of tempered glass. It must be strong but must also allow photons or EMR to pass through. The main purpose of it is to protect the inner layers and also maintain the vacuum within.

If this technology was utilised in conjunction with a DC superconducting electrical grid, the energy efficiency would be phenomenal. It could be used to power heavy industry, homes, vehicles, spacecraft, etc., and could guide humanity to a renewable future.