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Tesla claimed the invention was an electrical generator that would not consume any fuel.
Such a generator would be its own prime mover and was utterly impossible according to modern scientists.
Free energy inventions are devices which can tap a seemingly unlimited supply of energy from the universe, without burning any kind of fuel, creating the perfect solution to the worldwide energy crisis and its associated pollution, degradation, and depletion of the environment.Conventional solar panels are expensive, and, whatever the coating, they are manufactured by esoteric processes.But Tesla's solar panel is just a shiny metal plate with a transparent coating of an insulating material.Ninety to a hundred years ago, everybody knew that a heavier-than-air machine could not possibly fly. This was the learned opinion of practically all of the so-called experts on the matter.
For example, "The demonstration that no possible combination of known substances, known forms of machinery and known forms of force, can be united in a practical machine by which man shall fly long distances through the air." Fortunately, a few people such as the Wright Brothers wouldn't accept such pronouncements as the final word. Today, orthodox physicists and other scientists are saying similar things against the idea of free energy technologies.
Connect across the capacitor some sort of switching device so that it can be discharged at rhythmic intervals, and you have an electric output.