To reproduce:
Start a new ship, or use and old one.
Use "Modify Whole Ship" to double the size of the ship X3.
create a solar panel of 8X.05X8
Use "Modify Whole Ship" to halve the size of the ship X3.
The solar panel should now be 1X.01X1:
Copy paste to make a stack of the solar panels
This stack of any material solar panel will now vastly out perform the same volume of any material generators
I hope it was appropriate to post this here. As over powered as this is, I feel like the fragility of solar panels would balance it out with any sort of shield penetrating weapons on the opponent's side, but only if solar panels were like hangars and would only function if exposed.