Factorio Forums

http://i.imgur.com/ZZPdzrf.jpg

even though they are not connected to grid. They don't power anything so its just gui bug?

At a not connected Grid :

'Demand Satisfation' --> 0 Usage and 0 power = 100% satistfaction

At connected Grid

'Demand Satisfation' --> Usage lesser than power = 100% satistfaction
'Demand Satisfation' --> Usage greater than power = lesser than 100% satistfaction (but you have then an energy Problem )