Could We Extract Energy From a Black Hole? Scientists Propose a Wild New Plan - ScienceAlert

"Our theory shows that when magnetic field lines disconnect and reconnect, in just the right way, they can accelerate plasma particles to negative energies and large amounts of black hole energy can be extracted.".

Penrose's calculations suggested that if a particle split into two parts inside the ergosphere, with one piece falling into the event horizon and the other escaping the black hole's gravitational pull, energy yielded by the escaping object would be theoretically extractable, if practically impossible.

Via this method, escaping plasma streams with topped-up energy could theoretically serve as a virtually limitless source of free energy, as long as the black hole keeps swallowing negative energy plasma, that is.

"Achieving an efficiency greater than 100 percent is possible because black holes leak energy, which is given away for free to the plasma escaping from the black hole.".

Clearly, all mechanisms extract black hole rotational energy by feeding the black hole with negative energy and angular momentum."