Scenario: Aliens gift humanity some mega power plant that runs off a black hole or some shit. Maybe it’s a quantum time battery or perpetual motion machine, whatever.
If we plopped it somewhere on Earth, could humanity build infrastructure across the globe to provide everyone with near unlimited clean electricity?
A staple of Sci-fi like Star Trek is that not just power generation, but storage and transmission are also trivial. They have any number of ways to transmit energy across large distances, between ships etc.
As an example, this already exists: In a First, Caltech’s Space Solar Power Demonstrator Wirelessly Transmits Power in Space
I imagine one of the ways for planet level energy generation would be solar panels in space and transmitting to earth somehow. I don’t know whether that is feasible IRL anytime in the next 200 years but in a “sci fi setting” its probably the most reasonable idea that is not just “magic” IMO.
So maybe one realy big solar panel array, or a planet wide coverage of many smaller arrays coordinated for sharing load with dozens of transmission points down to Earth would be my solution to your question.