The price of electricity isn't always the same. It can change depending on the time of day and the season. Your utility company might charge you more or less for the electricity you use because the electricity demand fluctuates throughout the day and year. They have to adjust the supply to meet this demand.
When the electricity demand is high, usually in the afternoon and evening, the utility company charges you more for each kilowatt-hour (kWh) of electricity you use. These are known as peak hours or on-peak hours. During this time, the grid is under more pressure, and the utility company may need to rely on more expensive and less efficient power plants to meet the demand.
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