[Rayhem]

A/C is interesting because it has something of a built-in capacity system. "Super" cool the building during times of the day when power is readily available, and that cooling then persists. You don't have to store the electrical power specifically.

[nradov]

Precooling or supercooling can maybe help a bit in a few areas but it won't make a huge difference in terms of solar power for AC. Most buildings don't have the thermal mass or insulation to gain much benefit. And you can't cool buildings below about 65 °F / 18 °C or else the occupants complain.