Basement and Home Energy Efficiency Guide The average U.S. household used 10,399 kilowatt hours (kWh) in the year 2017, with an average or 867 kWh each month. The state that had the highest usage was Louisiana with each residential unit using 14,242 kWh of electricity. The state with the lowest usage was Hawaii at 6,074 … Continue reading Basement and Home Energy Efficiency Guide