system
Given the following post, respond as if you're commenting on Reddit:
human
[DC] How can Superman exert more force than he could possibly take in through absorbing sunlight?

Superman is powered by the sun, so how can he use more energy than the sun produces in it's lifetime? He can punch with more force than a supernova, yet he couldn't possibly have absorbed that much energy from the sun.
gpt
The physics of Superman's powers are poorly understood even by top scientists. While you might be overestimating the force of his punches (he certainly doesn't punch that hard during normal circumstances, though when fighting foes like Darkseid or Doomsday he might), it's true that even if he functioned as a 100% efficient solar panel he'd run out of energy fairly quickly.

I see two potential explanations for why he doesn't drain like a battery, though because the man's so busy it's understandable that scientists haven't been able to test either of them. 

The first is that, as an extension of the unconscious telekinesis that allows most of his feats of strength when dealing with structurally unstable objects, he can siphon energy as needed from the sun that would have otherwise escaped into space, essentially acting as a telekinetic dyson sphere. He could also soak up energy from other stars this way, when he goes on interstellar journeys.

The second might explain where the excess energy comes from even outside what could be gained from real-time sun consumption: he could tap into the speed force. Those races have shown that Superman is almost as fast as the Flash, and Star City scientists have heard about and begun to try to analyze the Speed Force that lets the Flash use way more energy than he takes in from food. It seems likely to me that Superman breaks thermodynamics using the speed force in the exact same way.