Yeah I'm not quite sure what happened here either. I just tried loading an old version of that world I shared and also into a new creative world to check it for the bug there too. However, the solar panels are working correctly in both test cases. The only thing that I could think of that might have ...

1. What did you do?
I played the game on the latest experimental version.

2. What happened?
I noticed that my solar panels on Vulcanus and Gleba were not producing the correct amounts of power.

3. What did you expect to happen instead? It might be obvious to you, but do it anyway!
For context all ...