But it is (should be) cheap to power the AC now.
In these scenarios, using more (renewable) electricity actually has no net effect at all, as it is purely from additional production, which is only available because you use it. I live in a region in Germany with a lot of wind and solar and I regularly see my PV plant be capped by the local energy company and the wind turbines around my village standing still despite a stiff breeze. Every kwh I use from my own PV in this case is free energy in the most expansive meaning of the word.