I bought a house last November; house has central air. I was absolutely floored when I got my first electric bill of the summer and it was $443 (the prior partial summer month was $260 so I had a slight heads up). During the winter, it was a moderate $75/month so I knew it would go up some, but not 6 times. According to my neighbor whose house was built at the same time - 2014 - their electric bill is $160 in the summer. The electric company told me the prior owner's summer bills where in the same range, but won't get specific.
So I had someone look at my air conditioner, which I figured was the biggest difference in summer and winter usage. The tech said there was a 'blockage' somewhere in it that caused it hard to 'balance' the airflow. I had a home warranty so I only had to pay for part of replacement and the house did have a 200 sq. ft addition put on after it was built which I thought might be a factor so I replaced the AC unit with a more energy efficient one. For those who understand, I went from a 10 SEER to a 13 SEER. I also went from 2.5 tons to 3 tons; the house is around 1,900 square feet.
It's only been a week, but in looking at my detailed energy usage, I'm not seeing any significant decrease in electric usage. I'm using +/- 60 kwh/day; and that seems to be about where I was a month ago under similar weather conditions. I did bump my thermostat from 74 to 78 in order to reduce energy usage; that dropped my electric bill $40 this month. The 60 kwh/day is after I bumped it to 78.
I will say my son is home from college this summer and has been running several computers/monitors, etc. He admits that will cause some distinct increase, but swears he's calculated it and it's not more than $30/month. He'll be gone in a week.
So I'm looking for other ideas on what might be causing my sky-high usage. Is it possible that something is wrong with how the electrical is hooked up on the AC? Any other ideas?