system
Given the following post, respond as if you're commenting on Reddit:
human
ELI5: Why do current generation solar panels only operate at ~30% efficiency? What stops us from achieving 100%?
gpt
100% efficiency would basically mean the solar panel is a black hole.  Any light that hits it disappears and is entirely converted to electricity.  The panel itself wouldn't get hot (because the heat is solar energy being converted into infrared), it wouldn't get worn or erode or degrade from the sun, it wouldn't reflect any light, etc.