Time-of-use electric rates are an electricity plan designed to incentivize you to use less electricity when the cost of generation is high. Time-of-use rates follow a set schedule, resulting in your electricity provider charging you more for your electricity consumption when the cost of generation and demand for electricity are high (i.e., the afternoon of a hot summer day) and less when both of these are low (i.e., in the middle of the night). You can save money in two ways: by being thoughtful about when you’re running certain appliances and waiting for off-peak times when cheap electricity is available, and by installing a solar battery to reduce the amount of electricity you pull from the grid when rates are high.