Michael Faraday, the Faraday Disk, is one potential of achieving over-unity because the diameter determines the voltage and the voltage has a squaring factor on its output.
But the Faraday disk is not practical because it would have to be massively large for a household.
The trick is how do you take, oh let's say, a 100 mile diameter disk and fit it in the corner of your bedroom and still have the voltage squaring factor on that diameter of a hundred miles, When being used as a Faraday Disk.
No you don't fold it
I know how!