What's this repair kit business? I admittedly only went about 1200 Ly out and back but during that time none of my modules took any damage at all. Or is it only if you take heat damage or are attacked the repair modules become useful?
Accidents will happen on longer trips - mainly losing concentration & flying too close to stars when scooping or flying into ring systems 'edge on' that you cant see.
These cause damage to your modules & with your repair kits you can restore them back to 100%