Also, all the activity you do inside your insulated home also increases temperature. Human body itself is a small space heater. At some point, you gotta get that energy out somehow, and if nights are hot, there is no way to do that except via a heat pump.
When it is 40C max by day and 22C min by night, for example, the outside is still cooler than the inside at night. So ventilating will have a real impact.
With this you might reach 25-26C inside in the morning and 29C by the end of the afternoon. It is hot but generally OK with fans, depending on humidity.
Then you can turn the AC on during daytime on top of that, which makes more sense than relying only on it.
Though I have no A/C, per se... I have thought about it. I'm 100% off grid, but the only time I would like that is when the sun is so far up that the batteries have all already charged.