Your electric usage is not that high. 15-16 KWh a day is normal. You probably have a lot of screen and monitors on during the day as your neighbors go to work. Check your meter and see what your daily electric consumption is when your family is away and your electronics are off. Your square footage is small for a family. Are you being compared to singles? Do you have more than one refrigerator? Do you have a finished basement that does not count towards the square footage. Does your home have more surface area than the similar homes? Is it an older home? I would suggest: Adding insulation in the attic. Reduce air leakage. Be sure to keep your refrigerator full.