Peak hours for SCE customers with time-of-use (TOU) rate plans are either 4-9 p.m. or 5-8 p.m., depending on their specific plan. Peak rates are highest in the TOU-D-5-8PM plan, in which on-peak rates reach 74 cents per kWh during summer weekdays. The TOU-D-4-9PM plan features a longer on-peak window, but a slightly lower summer weekday rate of 59 cents per kWh.