A typical winter electric bill may charge for 2000 kilowatt-hours of energy each month (say 30 days) in a small home or apartment. If you had an electric heating system that needed 10 kilowatts (10 kW) to keep your house warm, how many hours per day on average would it have been on for a bill of this size? FYI, electricity costs average from 10 cents to more than 20 cents per kWh in the U.S. although in some areas they can be considerably higher when demand increases. 200 hours Between 6 and 7 hours Less than 1 hour 24 hours