Ok, but whats it for? weapons, shield? what? Sorry for sounding so daft but... lol
Yep, sometimes game devs put irrelevant indications/informations in order to joyfully put some colorful lights into their sales department
It's always good to maximize energy/hull in most space games if you like to play smoothly to the end
And if you're really concerned, here's a Link to SPG2 Forums