system
Given the following post, respond as if you're commenting on Reddit:
human
[DC] How does Superman get so much power from solar energy?

You can set up entire farms of solar panels for years and not be able to do half of what Superman can do. I'd chalk it up to Kryptonian biology being crazy efficient, but even using 100% percent of a day's sunlight can't account for the power it gives him.
gpt
I think the power is coming from somewhere else, and yellow sunlight is like a "vitamin" or "insulin" that lets him tap into it.

There have been too many plot points about his solar energy getting depleted, needing the sun to heal himself, etc. He clearly needs sunlight for *something* to do with his powers. But as you say, all the sunlight that strikes his body for a full day could hardly power one second's worth of some of the stuff he's done. However this really works, it's not like a solar panel.

Seems like yellow solar rays are more of a catalyst for him, rather than the actual power source.