Off-peak electricity is power supplied during lower-demand periods, often overnight, when some retailers offer a lower usage rate. In Australia, the times and prices vary by state, network, retailer and tariff, and may be called a controlled load or dedicated circuit for appliances such as hot-water systems. Your meter and tariff determine whether appliances use off-peak power automatically, so check your latest bill or ask your retailer about the applicable times and rates. Compare the full tariff, including peak charges and supply fees, before switching.