I was getting electric bills in excess of 300 a month, which I knew to be about twice my normal. I purchased Sense to try and help me find the problem. Right out of the box I could see something kicking in 3 times an hour for like 13kwh. With a little process of elimination because Sense had not identified the unit yet, I was able to identify the culprit as the hot water heater. The hot water heater was really new, installed about 2 years ago and supposed to be energy efficient. I went and checked the setting and found it in performance mode. Set it to Energy Saver mode, and it uses a 10th of the energy it was using before.