A kilowatt-hour (kWh) is a measure of electrical energy usage.
1 kilowatt-hour is the amount of energy it takes to run a 1,000-watt appliance for 1 hour. For example, running a 100w light bulb for 10 hours consumes 1 kWh.
According to the U.S. Energy Information Administration (www.eia.gov) the average electricity consumption for a U.S. residential utility customer in 2021 was about 886 kWh per month.