Electricity is typically cheapest during off-peak hours, which are the early morning and late night when the demand for electricity is lowest. In Alberta, off-peak hours are typically between 9:00 PM and 7:00 AM. To save money on electricity bills, it's a good idea to use washing machines and dishwashers during off-peak hours. These are times when electricity rates are lower because there is less demand for electricity. During peak hours, when more people are using electricity, the rates are higher because the power grid is under more stress. If you avoid using heavy-use appliances during peak hours, you can save money on your electricity bills.