We have a 1937 sq ft designer with volume ceilings. Our elec for June, July Aug & Sept this year was $142, $155, $178 and $196. We keep the temp right around 78 degrees.
I think volume ceilings help a house in the summer, as hot air rises. Seems like the cold air from the AC would fall and displace the hot air more easily with volume ceilings. After all, the thermostat is at about 5 feet off the floor, so the temp would rise in the lower part of the house and the AC would shut off.
In the winter (thankfully there really isn't one) the opposite would occur, and the rooms would need to warm from the top down, making the heating system work longer.
$227 sounds high, unless you consume lots of electric doing other stuff like lights on all the time, electric hot tub heater, extra refrigerators in the garage and the like. Also as mentioned if you have an all electric house you are cooking, drying clothes and heating water with electric too.
You might want to get a real thermometer too, perhaps your thermostat isn't 100% accurate, and you are really cooling the house to 76 or 75, thinking it's 78.
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