The direct conversion of sunlight to electricity has been technically feasible for many years. Likewise, chemical storage of electrical energy in batteries has also been done since before the twentieth century. Seemingly, there would be no problems in building a system which would convert the sun's energy into electricity, store the excess energy for use during the night, and provide DC power for an impressed current cathodic protection system. This is technically true, however a much different set of data must be considered than if the same power were to be delivered by a cathodic protection rectifier.

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