The images for mono and regular panels appear to be switched
Solar panels have wrong image in build menu
I think that actualy the solar cell textures on the models have been switched &
not the preview images in the build menu.
I had a discussion about this here: https://discord.com/channels/803508556325584926/985064985501769739/1386971918334431232
The model of the solar panel and it's preview are now matching, but I'm unsure, if it's correct the way it is now. Since higher performance solar cells irl typically appear darker.
Also is the Icon of the solar cell (MKI) light blue and the mono solar cell is dark blue, but the resulting buildings are the other way around

It might make sense anyway.
Just have a look at the exact texture of the T1 solar panels,
the solar cell surface is extremely crunchy, T2 ones are "flat":
https://discord.com/channels/803508556325584926/985064985501769739/1386980184191795331
Closed as ✅ Fixed