Thank you for clarification. It still sounds a bit confusing, because the popup hint for the solar grid says “+3 Stars, +1 Electricity, -1 Worker” as you can see on the screenshot.
I have clearly not had enough coffee this morning..... I issue is that mines have a bonus that makes them use less power when adjacent and satisfied - this gives you your missing 2 power. Sorry for the confusion, I will think about how to make this more obvious at this initial stage of the game.
