Forge version: 35.1.13
Futurepack version: 21.0.2

The NE/Cycle value shown in the Screnching GUI of the Solar Panel is always shown to be 0, although it is generating energy as intended.

The Ion Collector does not have this issue.

PLease try this version 21.0.3

The NE/Cycle number is now updated when you open the GUI of the Solar Panel!

However, it is only updated when you open the regular GUI of the Solar Panel.

When you place down a new Solar Panel and open its motherboard GUI without opening the regular GUI, then NE/Cycle is still shown as zero.

I think it would be best if the NE/Cycle number was instead updated when opening the motherboard GUI, since you can't see that number anyway in the regular GUI.

and doing that is insanly difficult with (my) current design sadly.

Alright, no worries! I would say that your fix works well enough!