What is time-to-use (TOU) pricing?

The provincial government has imposed a new complicated electricity plan known as time-of-use pricing where the rate you are charged depends on when you use your electricity and the rates are different for On-Peak usage hours, Mid-Peak usage hours and Off-Peak usage hours. Mid-Peak and On-Peak hours flip in the winter and summer due to demand factors and rates can change every 6 months. Ontario Residential Plans.