Fair enough. But in Arizona, it's not like you're just turn off the AC completely and let the house bake in the 115 noonday heat. Maybe you bump your thermostat from 76 to 90 from 9-3 (gotta give it time to cool back down before you get home). That cuts your power usage in half for six hours of the day, 22 days a month. At most that might save you $120 during the hot summer months.