The plant that concentrates sunlight to store heat in molten salt to produce electricity 24/7 has even more promise if located in the Sahara Desert where it would be impractical to use water for agriculture.
If enough molten salt is used, stored nuclear waste could add to the solar energy output as soon as the problem of corrosion is not a problem. A radium-beryllium alloy would supply enough neutrons to safely run a nuclear reactor made completely out of nuclear waste for fuel.
Even better adjust research nuclear reactors to the operating temperature of this solar plant, for commercial power plant fuel efficiency results by supplementing solar output with experimental nuclear output. Carbon dioxide used as the core moderator will drop a nuclear reactor below critical mass as soon as it escapes the pressure vessel to avoid Chernobyl results. Extra stored molten salt would then flood the core laced with boron to wick nuclear waste heat away to the heat storage unit of the whole power plant. Depleted uranium oxide lining for the pressure vessel has over a 5000 degree melting point to allow the safe breeding of fuel. Molten aluminum instead of CO2 may also work if bombardment by fast neutrons creates Al-26 and two slower neutrons. Be(O18-8) ceramic would also be a neutron boosting material.
Solar cells that could withstand temperatures used to heat the molten salt would boost Carnot Cycle efficiency.
A superconducting power line under the Straight of Gibraltar would allow electricity to be exported to Europe from the sunny Sahara Desert.
This technology could be optimized for outer space use in the far future, as it is helped by a lot of salt used for thermal mass.