Peak hours are generally between 7 am and 11 pm on Monday to Friday (except most holidays) when the most people are powering their homes so demand is highest. Usage during peak hours incurs the highest rates. Off-peak hours are between 11 pm and 7 am when demand is lower. Usage during off-peak hours has cheap electricity rates. Each state in Australia has different peak times so when you compare electricity plans make sure you check the off-peak periods relevant to your area to find the best electricity prices for your home.